Volkswagen Caddy (SB; 2024 – 2025) – fuse and relay box diagram

Posted on 28 August 202528 August 2025 by admin

Volkswagen Caddy (SB; 2024 – 2025) – fuse and relay box diagram

Year of production: 2024, 2025

The fifth-generation Volkswagen Caddy was produced from 2021 to present. In this guide, you will find descriptions of the fuses and relays for the Volkswagen Caddy 5 (2021 – 2023 models), including fuse box diagrams, their locations.

Passenger Compartment

Fuse box diagram

Assignment of the fuses in the passenger compartment

No.	A	Function/component
F1	–	–
F2	30	ATO, Rear fresh air control unit
F3	25	ATO, Trailer control unit, left (vehicles with factory-fitted towing bracket)
F4	30	ATO, Control unit for reduction agent heating [for vehicle with diesel engines]
F5	25	ATO, Parking lock actuator
F6	30	ATO, Interior lighting, On-board power supply control unit
F7	30	ATO, Seat heating, Heating and air conditioning control unit
F8	25	ATO, Control unit for special vehicles (depending on the equipment)
F9	30	ATO, Driver’s door control unit [for vehicle with left-hand steering], Front passenger’s door control unit [for vehicles with right-hand steering]
F10	25	ATO, Control unit for special vehicles
F11	15	ATO, Trailer recognition control unit (vehicles with factory-fitted towing bracket)
F12	40	MAXI+, Right exterior lighting, On-board power control supply control unit
F13	40	MAXI+, Central locking, On-board power control supply control unit
F14	40	MAXI+, Interior with socket, 12V/230V
F15	–	–
F16	7,5	MINI, Airbag control unit, Seat occupied sensor radio communication control unit
F17	10	MINI, Relay for reducing agent dosing system [for vehicles with diesel engines] / Supply module of the reducing agent dosing system [for vehicles with diesel engines] / Recovery tank [for vehicles with diesel engines]
F18	10	MINI, Electronic steering column lock control unit / Access and start authorization interface / Anti-theft alarm control unit 2 / Anti-theft alarm control unit 3 / Anti-theft alarm control unit 4 / Anti-theft alarm control unit 5
F19	7,5	MINI, Instrument cluster / Control unit for emergency call module and communication unit
F20	7,5	MINI, Telephone, Storage compartment with mobile phone interface / Transmission and reception stabilization control unit / USB port 1
F21	7,5	MINI, Interior lighting relay / Blind spot monitoring control unit / Blind spot monitoring control unit 2 / Around view camera rear view
F22	–	–
F23	15	MINI, Contact plate in left B-pillar
F24	15	MINI, All-wheel drive control unit
F25	25	ATO, Control unit for special vehicles
F26	30	ATO, Front passenger door control unit
F27	25	ATO, Control unit for special vehicles
F28	–	–
F29	15	ATO, Trailer charging cable ( vehicles with factory-fitted towing bracket)
F30	20	ATO, Infotainment components, Electronic information system control unit 1
F31	25	ATO, trailer control unit, right (vehicles with factory-fitted towing bracket)
F32	15	ATO, Rear lid control unit
F33	15	ATO, Contact plate in right B-pillar
F34	–	–
F35	40	MAXI+, Left exterior lighting, On-board power supply control unit
F36	40	MAXI+, Blower regulator, Supply air fan control unit
F37	–	–
F38	–	–
F39	–	–
F40	7,5	MINI, anti-theft alarm
F41	7,5	MINI, Data bus diagnostic interface
F42	7,5	MINI, Selector lever / Selector lever position indicator
F43	10	MINI, Heating and air conditioning control unit / Interior temperature sensor / Rear window heating relay / Tyre pressure monitoring control unit / Auxiliary heater radio signal receiver
F44	7,5	MINI, Electromechanical parking brake button / Dash panel switch module, center / Light control panel / Anti-theft alarm sensor / Air humidity, rain and light sensor / Front interior light
F45	7,5	MINI, Steering column electronics control unit
F46	7,5	MINI, Display for front control, display and information unit
F47	–	–
F48	–	–
F49	–	–
F50	–	–
F51	–	–
F52	20	ATO, Cigarette lighter [Optional][5] / 12V socket [Optional][5] / 12V socket 3 [Optional][5] / 12V socket 4 [Optional][5]
F53	–	–
F54	–	–
F55	–	–
F56	–	–
F57	–	–
F58	7,5	MINI, Adaptive cruise control unit [Optional] / Parking assistance control unit [Optional] / Front camera for driver assistance systems [Optional]
F59	7,5	MINI, Electromechanical parking brake button / Reversing light switch [Optional] / Refrigerant circuit pressure sensor / Socket relay
F60	7,5	MINI, Diagnostic connector
F61	7,5	MINI, Clutch pedal position sensor [Optional] / Starter relay 1 / Starter relay 2
F62	7,5	MINI, USB charging socket 1 [Optional]
F63	–	–
F64	–	–
F65	–	–
F66	15	ATO, Rear window wiper.
F67	30	MAXI+, Rear window heating
R1		Socket relay
R2		Power supply relay terminal 15
R3		Rear window heating relay
R4		Relay for reducing agent dosing system [for cars with diesel engine]

Engine Comparment

Fuse box diagram

Assignment of the fuses in the engine compartment

No.	A	Function/component
F1	80	MIDI, Power steering control unit
F2	7,5	ATO, ABS control unit / Main relay [for cars with a gasoline engine] / Terminal 30 power supply relay [for vehicles with diesel engines] / Engine control unit
F3	7,5	ATO, [with engine letter designation DHFA] Shut-off and safety valve 1 for gas cylinder / Shut-off and safety valve 2 for gas cylinder / Shut-off and safety valve 3 for gas cylinder / Shut-off and safety valve 4 for gas cylinder / Shut-off and safety valve 5 for gas cylinder
F4	15	ATO, Headlight front left
F5	15	ATO, Headlight front right
F6	–	–
F7	30	ATO, Gearbox oil cooling pump [Optional]
F8	40	ATO, Brake booster
F9	15	ATO, Horn relay
F10	30	ATO, Windscreen wiper motor relay 1 / Windscreen wiper motor relay 2 / Windscreen wiper motor
F11	–	–
F12	15	ATO, Mechatronic unit DSG gearbox [Optional]
F13	25	ATO, ABS control unit
F14	20	ATO, Additional heater control unit [Optional]
F15	40	ATO, ABS control unit
F16	–	–
F17	40	MAXI, Heating element for additional air heater [for vehicles with diesel engines]
F18	40	MAXI, Heating element for additional air heater [for vehicles with diesel engines]
F19	–	–
F20	–	–
F21	7,5	ATO, Engine control unit
F22	30	Starter
F23	15	ATO, Engine control unit
F24	7,5	ATO, [for vehicles with diesel engines] Oil level and temperature sensor [for vehicles with diesel engines] / Fuel pump relay [for vehicles with diesel engines] / Activated carbon filter solenoid valve 1 [for vehicles with diesel engines] / Exhaust camshaft adjuster valve 1 [for vehicles with diesel engines] / Oil pressure regulating valve [for vehicles with diesel engines] / Inlet camshaft adjuster cylinder 2 [for vehicles with diesel engines] / Exhaust camshaft adjuster cylinder 2 [for vehicles with diesel engines] / Inlet camshaft adjuster cylinder 3 [for vehicles with diesel engines] / Exhaust camshaft adjuster cylinder 3 [for vehicles with diesel engines] / Inlet camshaft adjuster valve 1 [for vehicles with diesel engines] / Radiator fan [for vehicles with diesel engines]
F24	10	ATO, for cars with a gasoline engine] Oil level and temperature sender [for cars with a gasoline engine] / Glow plug control unit [for cars with a gasoline engine] / Reducing agent preheating control unit [for cars with a gasoline engine] / Reducing agent metering system relay [for cars with a gasoline engine] / Fuel pressure regulator [for cars with a gasoline engine] / Fuel metering valve [for cars
F25	7,5	ATO, Injector cylinder 1 / Injector cylinder 2 / Injector cylinder 3 / Injector cylinder 4
F26	10	ATO, Crankcase ventilation heating resistor [for vehicles with diesel engines] / Oil pressure regulating valve [for vehicles with diesel engines] / Coolant regulating valve [for vehicles with diesel engines] / Piston cooling nozzle control valve [for vehicles with diesel engines] / Heater circulation pump [for vehicles with diesel engines] / Charge air cooling pump [for cars with a gasoline engine] /
, F27	10	ATO, [for cars with a gasoline engine] Lambda probe 1 after neutralizer [for cars with a gasoline engine] / Lambda probe 1 before neutralizer [for cars with a gasoline engine]
F27	15	ATO, [for vehicles with diesel engines] Soot Particle Sensor [for vehicles with diesel engines] / NOx Sensor 3 [for vehicles with diesel engines] / Lambda Probe 1 Before Catalytic Converter [for vehicles with diesel engines] / NOx Sensor Control Unit [for vehicles with diesel engines] / NOx Sensor Control Unit 2 [for vehicles with diesel engines]
F28	20	ATO, Ignition coil 1 with output stage [for cars with a gasoline engine] / Ignition coil 2 with output stage [for cars with a gasoline engine] / Ignition coil 3 with output stage [for cars with a gasoline engine] / Ignition coil 4 with output stage [for cars with a gasoline engine]
F29	15	ATO, [for cars with a gasoline engine] Fuel pump control unit / Fuel delivery module
F29	20	ATO [for vehicles with diesel engines]
F30	–	–
F31	7,5	ATO, brake light sensor
F32	–	–
F33	40	MAXI, Heating element for additional air heater [for vehicles with diesel engines]
F34	30	ATO, Heated windscreen relay [for cars with heated windshield] / Windscreen heating element [for cars with heated windshield] / Relay 2 for heated windscreen [for cars with heated windshield]
F35	30	Relay 2 for heated windscreen [for cars with heated windshield] / Windscreen heating element [for cars with heated windshield]
R1		Main relay [for cars with petrol engines], Power supply relay terminal 30 [for cars with diesel engine]
R2		High Power Heating Relay
R3		Horn relay
R4		Starter relay 1
R5		Starter relay 2
R6		Fuel pump relay/ Gas shut-off valve relay [with engine letter designation DHFA]
R7		Glow plug control unit [for cars with diesel engine]
R8		Low power heating relay [for vehicles with additional air heater heating element]
R9		Heated windscreen relay
R10		Relay 2 for heated windscreen
R11		Relay 1 windscreen wiper motor
R12		Windscreen wiper motor relay 2

Fuses for junction box 1 (SX1)

Assignment of the fuses in the juncion box 1 (SX1)

Type	No.	Function/component
Battery Terminal	SA1	Fuse box B
Battery Terminal	SA2	Radiator Fan [for vehicle with a simple radiator fan]
Battery Terminal	SA2	Radiator Fan [for vehicle with dual radiator fan]
Battery Terminal	508	Switching and distribution box 2/ Battery
Battery Terminal	SA4	Fuse box C
Battery Terminal	SA5	Fuse box C

Fuses for junction box 2 (SX2)

Assignment of the fuses in the juncion box 2 (SX2)

Type	No.	Function/component
MIDI	A	Starter/ Generator with voltage regulator
MIDI	B	Relay and fuse block J for special vehicle [for cars with preparation for a 2nd battery]

There are also videos on this topic on our YouTube channel.

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

Volkswagen Caddy (SB; 2021 – 2023) – fuse and relay box diagram

Posted on 28 August 202528 August 2025 by admin

Volkswagen Caddy (SB; 2021 – 2023) – fuse and relay box diagram

Year of production: 2021, 2022, 2023

Passenger Compartment

Fuse box diagram

Assignment of the fuses in the passenger compartment

No.	A	Function/component
F1	–	–
F2	30	ATO, Rear fresh air control unit
F3	25	ATO, Trailer control unit, left (vehicles with factory-fitted towing bracket)
F4	30	ATO, Control unit for reduction agent heating [for vehicle with diesel engines]
F5	25	ATO, Parking lock actuator
F6	30	ATO, Interior lighting, On-board power supply control unit
F7	30	ATO, Seat heating, Heating and air conditioning control unit
F8	25	ATO, Control unit for special vehicles (depending on the equipment)
F9	30	ATO, Driver’s door control unit [for vehicle with left-hand steering], Front passenger’s door control unit [for vehicles with right-hand steering]
F10	25	ATO, Control unit for special vehicles
F11	15	ATO, Trailer recognition control unit (vehicles with factory-fitted towing bracket)
F12	40	MAXI+, Right exterior lighting, On-board power control supply control unit
F13	40	MAXI+, Central locking, On-board power control supply control unit
F14	40	MAXI+, Interior with socket, 12V/230V
F15	–	–
F16	7,5	MINI, Airbag control unit, Seat occupied sensor radio communication control unit
F17	10	MINI, Relay for reducing agent dosing system [for vehicles with diesel engines] / Supply module of the reducing agent dosing system [for vehicles with diesel engines] / Recovery tank [for vehicles with diesel engines]
F18	10	MINI, Electronic steering column lock control unit / Access and start authorization interface / Anti-theft alarm control unit 2 / Anti-theft alarm control unit 3 / Anti-theft alarm control unit 4 / Anti-theft alarm control unit 5
F19	7,5	MINI, Instrument cluster / Control unit for emergency call module and communication unit
F20	7,5	MINI, Telephone, Storage compartment with mobile phone interface / Transmission and reception stabilization control unit / USB port 1
F21	7,5	MINI, Interior lighting relay / Blind spot monitoring control unit / Blind spot monitoring control unit 2 / Around view camera rear view
F22	–	–
F23	15	MINI, Contact plate in left B-pillar
F24	15	MINI, All-wheel drive control unit
F25	25	ATO, Control unit for special vehicles
F26	30	ATO, Front passenger door control unit
F27	25	ATO, Control unit for special vehicles
F28	–	–
F29	15	ATO, Trailer charging cable ( vehicles with factory-fitted towing bracket)
F30	20	ATO, Infotainment components, Electronic information system control unit 1
F31	25	ATO, trailer control unit, right (vehicles with factory-fitted towing bracket)
F32	15	ATO, Rear lid control unit
F33	15	ATO, Contact plate in right B-pillar
F34	–	–
F35	40	MAXI+, Left exterior lighting, On-board power supply control unit
F36	40	MAXI+, Blower regulator, Supply air fan control unit
F37	–	–
F38	–	–
F39	–	–
F40	7,5	MINI, anti-theft alarm
F41	7,5	MINI, Data bus diagnostic interface
F42	7,5	MINI, Selector lever / Selector lever position indicator
F43	10	MINI, Heating and air conditioning control unit / Interior temperature sensor / Rear window heating relay / Tyre pressure monitoring control unit / Auxiliary heater radio signal receiver
F44	7,5	MINI, Electromechanical parking brake button / Dash panel switch module, center / Light control panel / Anti-theft alarm sensor / Air humidity, rain and light sensor / Front interior light
F45	7,5	MINI, Steering column electronics control unit
F46	7,5	MINI, Display for front control, display and information unit
F47	–	–
F48	7,5	USB charging socket 1 [Optional]
F49	–	–
F50	–	–
F51	–	–
F52	20	ATO, Cigarette lighter [Optional][5] / 12V socket [Optional][5] / 12V socket 3 [Optional][5] / 12V socket 4 [Optional][5]
F53	–	–
F54	–	–
F55	–	–
F56	–	–
F57	–	–
F58	7,5	MINI, Adaptive cruise control unit [Optional] / Parking assistance control unit [Optional] / Front camera for driver assistance systems [Optional]
F59	7,5	MINI, Electromechanical parking brake button / Reversing light switch [Optional] / Refrigerant circuit pressure sensor / Socket relay
F60	7,5	MINI, Diagnostic connector
F61	7,5	MINI, Clutch pedal position sensor [Optional] / Starter relay 1 / Starter relay 2
F62	–	–
F63	–	–
F64	–	–
F65	–	–
F66	15	ATO, Rear window wiper.
F67	30	MAXI+, Rear window heating
R1		Socket relay
R2		Power supply relay terminal 15
R3		Rear window heating relay
R4		Relay for reducing agent dosing system [for cars with diesel engine]

Engine Comparment

Fuse box diagram

Assignment of the fuses in the engine compartment

No.	A	Function/component
F1	80	MIDI, Power steering control unit
F2	7,5	ATO, ABS control unit / Main relay [for cars with a gasoline engine] / Terminal 30 power supply relay [for vehicles with diesel engines] / Engine control unit
F3	–	–
F4	15	ATO, Headlight front left
F5	15	ATO, Headlight front right
F6	–	–
F7	30	ATO, Gearbox oil cooling pump [Optional]
F8	40	ATO, Brake booster
F9	15	ATO, Horn relay
F10	30	ATO, Windscreen wiper motor relay 1 / Windscreen wiper motor relay 2 / Windscreen wiper motor
F11	–	–
F12	15	ATO, Mechatronic unit DSG gearbox [Optional]
F13	25	ATO, ABS control unit
F14	20	ATO, Additional heater control unit [Optional]
F15	40	ATO, ABS control unit
F16	–	–
F17	40	MAXI, Heating element for additional air heater [for vehicles with diesel engines]
F18	40	MAXI, Heating element for additional air heater [for vehicles with diesel engines]
F19	–	–
F20	–	–
F21	7,5	ATO, Engine control unit
F22	30	Starter
F23	15	ATO, Engine control unit
F24	7,5	ATO, [for vehicles with diesel engines] Oil level and temperature sensor [for vehicles with diesel engines] / Fuel pump relay [for vehicles with diesel engines] / Activated carbon filter solenoid valve 1 [for vehicles with diesel engines] / Exhaust camshaft adjuster valve 1 [for vehicles with diesel engines] / Oil pressure regulating valve [for vehicles with diesel engines] / Inlet camshaft adjuster cylinder 2 [for vehicles with diesel engines] / Exhaust camshaft adjuster cylinder 2 [for vehicles with diesel engines] / Inlet camshaft adjuster cylinder 3 [for vehicles with diesel engines] / Exhaust camshaft adjuster cylinder 3 [for vehicles with diesel engines] / Inlet camshaft adjuster valve 1 [for vehicles with diesel engines] / Radiator fan [for vehicles with diesel engines]
F24	10	ATO, for cars with a gasoline engine] Oil level and temperature sender [for cars with a gasoline engine] / Glow plug control unit [for cars with a gasoline engine] / Reducing agent preheating control unit [for cars with a gasoline engine] / Reducing agent metering system relay [for cars with a gasoline engine] / Fuel pressure regulator [for cars with a gasoline engine] / Fuel metering valve [for cars
F25	7,5	ATO, Injector cylinder 1 / Injector cylinder 2 / Injector cylinder 3 / Injector cylinder 4
F26	10	ATO, Crankcase ventilation heating resistor [for vehicles with diesel engines] / Oil pressure regulating valve [for vehicles with diesel engines] / Coolant regulating valve [for vehicles with diesel engines] / Piston cooling nozzle control valve [for vehicles with diesel engines] / Heater circulation pump [for vehicles with diesel engines] / Charge air cooling pump [for cars with a gasoline engine] /
, F27	10	ATO, [for cars with a gasoline engine] Lambda probe 1 after neutralizer [for cars with a gasoline engine] / Lambda probe 1 before neutralizer [for cars with a gasoline engine]
F27	15	ATO, [for vehicles with diesel engines] Soot Particle Sensor [for vehicles with diesel engines] / NOx Sensor 3 [for vehicles with diesel engines] / Lambda Probe 1 Before Catalytic Converter [for vehicles with diesel engines] / NOx Sensor Control Unit [for vehicles with diesel engines] / NOx Sensor Control Unit 2 [for vehicles with diesel engines]
F28	20	ATO, Ignition coil 1 with output stage [for cars with a gasoline engine] / Ignition coil 2 with output stage [for cars with a gasoline engine] / Ignition coil 3 with output stage [for cars with a gasoline engine] / Ignition coil 4 with output stage [for cars with a gasoline engine]
F29	15	ATO, [for cars with a gasoline engine] Fuel pump control unit / Fuel delivery module
F29	20	ATO [for vehicles with diesel engines]
F30	–	–
F31	7,5	ATO, brake light sensor
F32	–	–
F33	40	MAXI, Heating element for additional air heater [for vehicles with diesel engines]
F34	30	ATO, Heated windscreen relay [for cars with heated windshield] / Windscreen heating element [for cars with heated windshield] / Relay 2 for heated windscreen [for cars with heated windshield]
F35	30	Relay 2 for heated windscreen [for cars with heated windshield] / Windscreen heating element [for cars with heated windshield]
R1		Main relay [for cars with petrol engines], Power supply relay terminal 30 [for cars with diesel engine]
R2		High Power Heating Relay
R3		Horn relay
R4		Starter relay 1
R5		Starter relay 2
R6		Fuel pump relay/ Gas shut-off valve relay [with engine letter designation DHFA]
R7		Glow plug control unit [for cars with diesel engine]
R8		Low power heating relay [for vehicles with additional air heater heating element]
R9		Heated windscreen relay
R10		Relay 2 for heated windscreen
R11		Relay 1 windscreen wiper motor
R12		Windscreen wiper motor relay 2

Fuses for junction box 1 (SX1)

Assignment of the fuses in the juncion box 1 (SX1)

Type	No.	Function/component
Battery Terminal	SA1	Fuse box B
Battery Terminal	SA2	Radiator Fan [for vehicle with a simple fan]
Battery Terminal	SA2	Radiator Fan [for vehicle with dual radiator fan]
Battery Terminal	508	Switching and distribution box 2/ Battery
Battery Terminal	SA4	Fuse box C
Battery Terminal	SA5	Fuse box C

Fuses for junction box 2 (SX2)

Assignment of the fuses in the juncion box 2 (SX2)

Type	No.	Function/component
MIDI	A	Starter/ Generator with voltage regulator
MIDI	B	Relay and fuse block J for special vehicle [for cars with preparation for a 2nd battery]

There are also videos on this topic on our YouTube channel.

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

Volkswagen Caddy (IV; 2015 – 2020) – fuse and relay box diagram

Posted on 27 August 202527 August 2025 by admin

Volkswagen Caddy (IV; 2015 – 2020) – fuse and relay box diagram

Year of production: 2015, 2016, 2017, 2018, 2019, 2020

The fourth-generation Volkswagen Caddy was produced from 2015 to 2020. In this guide, you will find descriptions of the fuses and relays for the Volkswagen Caddy 4 (2015 – 2020 models), including fuse box diagrams, their locations.

Passenger Compartment

Fuse box location

The interior fuse box is located at the bottom of the dashboard, behind a protective cover.

Fuse box diagram

Assignment of the fuses in the passenger compartment

No.	A	Function/component
1	–	–
2	–	–
3	–	–
4	–	–
5	–	–
6	–	–
7	–	–
8	–	–
9	10	10-pin connector, pin 4 (interface for special functions)
10	8	Diagnostic data bus interface. Engine control unit. Starter relay 1. Starter relay 2.
11	5	Parking assistance system control unit unit. Power steering control unit
12	5	Taximeter. Taximeter mirror.
12	20	8-pin connector, pin 8; 28-pin connector, pin 20
13	7,5	Headlight range – adjustable. Button for disabling ASR and electronic stability control. Selector lever. Tire pressure indicator button. Start/stop button. ABS control unit. Trailer detection control unit. ACC control unit. Four-wheel drive control unit. Power steering control unit. DSG transmission mechatronic control unit. Inverter with 12 V/230 V socket. Range control motor for left headlamp. Right headlamp range control motor.
14	10	Reverse light switch. Mass air flow sensor. Auxiliary heater switch relay. Control unit in instrument cluster. Crankcase ventilation heater resistor. Diagnostic connector. 1-pole connector, pin sixteen
15	5	Airbag control unit. Front passenger airbag deactivation indicator.
16	5	Lighting switch. Heating and mode selection switch. High pressure sensor. Atmospheric pollution sensor sensor. Temperature and oil level sensor. Light sensor. High beam assistant control unit. Front driver assistance camera. Anti-glare interior mirror.
17	–	–
18	10	10-pin connector, pin 6 (interface for special functions)
19	10	Taximeter. Mirror with taximeter. Walkie-talkie. Printer.
19	10	10 pin connector, pin 7 (interface for special functions)
20	20	Volkswagen Caddy 4 cigarette lighter fuse. 12 V connector, in the storage compartment
21	10	Heating and mode selection operation. Selector lever. Rear window heater relay. Rear window heater relay relay. Climatronic control unit. Air conditioning control unit. Emergency data recorder. (except special equipment for police). Reducing agent dosing system relay. Dual-band cell phone signal amplifier. Radio signal receiver for auxiliary water heater. Bluetooth cell phone antenna. 6-pin connector, 2-pin connector (special police equipment only). Diagnostic connector. 16-pin connector, pin 16
21	10	Light switch. Heating and heating mode selection switch. Selector switch. Ambient light switch in rear cowl (Camper). Illumination 1 in the tailgate. Illumination 2 in the tailgate. Rain and light sensor. Rear window heater relay. Climatronic control unit. Air conditioning control unit. Horn relay. Emergency data recorder. (Except special equipment for police). Reducing agent. Dosing system relay. 16-pole diagnostic connector, pin 16. Rear interior light (Camper). Illumination 1 in rear of hood. Illumination 2 in the rear of the hood. Rear reversing camera.
22	10	On-board network control unit. Lighting in the passenger compartment. Trunk light. Glove compartment light. Center cabin light. Rear interior light. Backlight 1 in tailgate (special equipment). Backlight 2 in tailgate (special equipment). Trunk light 2 (special equipment). Front left reading light. Front right reading light. Rear left reading lamp 2. Rear right reading light 2. On-board network control unit. Left fog lamp bulb. Right fog lamp bulb.
23	5	[Special vehicles] Taxi – interior light switch. Cab signal switch. 10-pin connector, pin 1 (interface for special functions)
23	10	[special vehicles] Direction indicator relay.
24	5	Interior condition monitoring sensor. Vehicle tilt sensor. Anti-theft alarm sensor. Alarm. on-board network control unit
25	5	Instrument panel. Control unit in the instrument cluster
26	10	Button for emergency data recorder (without special police equipment); Emergency data recorder (without special police equipment)
27	–	–
28	–	–
29	15	Rear wiper motor.
30	–	–
31	5	Heater operating mode switch. Heating resistor for left windshield washer nozzle. Heating resistor for right windshield washer nozzle.
32	–	–
33	40	Auxiliary heater switch relay ( vehicles with auxiliary heater, without R1234yf refrigerant); Heating mode switch. Air conditioner control unit. Auxiliary heater switch relay (cars with auxiliary heater, with R1234yf refrigerant); Fresh air fan cut-off relay. Heating mode switch. Air conditioner control unit. Outside air fan isolation relay (vehicles without auxiliary heater, with R1234yf refrigerant); Air conditioner control unit.
34	–	–
35	–	–
36	–	–
37	–	–
38	–	–
39	30	4-pin connector, pin 1 [special vehicles].
40	20	Trailer detection control unit.
41	20	Trailer detection control unit.
42	20	Trailer detection control unit.
43	15	Fuel pump relay (Caddy gasoline pump fuse). Fuel pump. High pressure fuel supply relay. Additional fuel pump. Electric fuel pump relay 2.
43	20	[Euro 6 diesel engine] – Fuel pump relay. Electric fuel pump relay 2. Fuel pump.
44	40	Fresh air blower control unit. Fresh air blower.
45	20	Headlight washer relay. Headlamp washer pump.
46	10	Driver’s door control unit. (models without power windows), left-hand drive vehicles / Passenger door control unit. models without power windows), right-hand drive vehicles
46	30	Driver door control unit (models with power windows), left-hand drive vehicles / Passenger door control unit (models with power windows), right-hand drive vehicles
47	40	X relay relay relay contact, fuse box C in the passenger compartment.
48	30	Front seat heating control unit.
49	10	Driver door control unit (models without power windows), right-hand drive vehicles / Passenger door control unit (models without power windows), left-hand drive vehicles
49	30	Driver door control unit (models with power windows), right-hand drive vehicles / Passenger door control unit (models with power windows), left-hand drive vehicles
50	20	On-board network control unit. Windshield washer pump. Rear wiper motor. Windshield and rear window washer pump.
51	15	Trailer power relay. TCU connector.
51	30	10-pin connector, pin 4 / 10-pin connector, pin 5 [special vehicles].
52	25	Rear window defroster relay. Rear window defroster resistor. Left hinged door rear window defroster resistor. Right hinged door rear window defroster resistor. Fresh air fan relay (vehicles with auxiliary heater). Ballast resistor for fresh air fan with overheating protection. Fresh air blower.
53	20	12V outlet – rear in center console; 12V outlet in left rear side panel.
54	15	Roof fan switch relay 1. [special vehicles].
55	15	8-pin connector, pin 4 [special cars]
56	30	Inverter with socket, 12V/230V.
57	–	–
58	–	–
59	5	Radio switch. Engine boost switch. Daytime running lights switch. Emergency data logger.
60	30	3-pin connector, pin 1 [special vehicles].

Engine Comparment

Fuse box location

In the engine bay, the fuse and relay box is positioned next to the battery and protected by a cover.

Fuse box diagram

Assignment of the fuses in the engine compartment

No.	A	Function/component
1	30	Gearbox heating control unit
2	–	–
3	5	Battery condition monitoring control unit, board power control unit
4	20	ABS control unit, ABS hydraulic unit
5	15	DSG transmission mechatronic unit (02E) with 20-pin connector
5	30	DSG transmission mechatronic unit (0AM) with 25-pin connector
6	5	Before May 2017: Instrument cluster control unit, Steering column electronics control unit; From June 2017 [For left-hand drive vehicles]: Light switch, Trunk lid illumination switch (Camper), Trunk lid illumination 1, Trunk lid illumination 2, Rain and light sensor, Horn relay, Instrument cluster control unit, Steering column electronics control unit, Emergency call module and communication control unit, Reverse camera, Rear interior light (Camper), Rear lid illumination 1, Rear lid illumination 2; From June 2017 [For right-hand drive vehicles]: Control unit in instrument cluster, Electronic steering column control unit, Dual-band cell phone signal booster, Bluetooth cell phone antenna.
7	40	Power relay terminal 15: Interior fuse box (#9 – #16 and #25 – #27)
8	15	Control unit with display for radio with navigation, control unit 1 for information electronics, radio, USB hub
9	20	Wheel drive control unit
10	5	Engine control unit, main relay [gasoline engine], power relay terminal 30 [diesel engine]
11	20	Auxiliary heater control unit
12	5	Diagnostic data bus interface
13	15	Engine control unit [Petrol engine]
13	30	Engine control unit [Diesel engine]
14	10	[Diesel engine, complies with Euro 6 emission standard]: Inlet camshaft adjustment valve 1, Fuel pressure regulator, Fuel metering valve
14	15	[Diesel engine, compliant with Euro 5, Euro 4 emission class]: Fuel pressure regulator, Fuel metering valve
14	20	Ignition coil, Ignition coil 1, 2, 3 and 4 with output stage
15	5	Fuel pump relay, Electric fuel pump relay 2, Glow plug control unit; [Diesel engine complying with Euro 5, Euro 4 emission class]: Low output heater relay, High output heater relay
15	10	Lambda probe heating element, Lambda probe heating element 1 after catalytic converter
15	15	[Diesel engine compliant with Euro 6 emission standard]: Low output thermal relay, High output thermal relay; NOx sensor control unit, NOx sensor control unit 2, Lambda probe heating element; Injectors for cylinders 1, 2, 3 and 4 [Petrol engine 1.6L].
16	30	On-board network control unit, Front right headlamp, Right headlamp discharge lamp control unit, Right daytime running lamps and front side lamps control unit, Right headlamp bulb for adaptive lighting system, Left fog lamp or right fog lamp bulb, Right daytime running lamps bulb, Front left lamp, Rear right lamp, Front right lamp, Rear left turn signal lamp, Front right turn signal lamp, Left brake light bulb, Right reversing light bulb, Left turn signal lamp, Left turn signal repeater bulb, High beam bulb, Right low beam bulb, Right high beam bulb, Right high beam bulb
17	15	Horn relay: High tone signal
18	30	Control unit for special vehicles
19	30	Windshield wiper motor control unit: Windshield wiper motor
20	10	Shut-off and safety valve 1, 2, 3, 4 and 5 for gas cylinder
21	10	[Diesel engine, complies with Euro 6 emission standard]: Fuel pump relay, glow plug control unit; lambda probe heating element [Diesel engine, complies with Euro 5, Euro 4 emission standards].
21	15	Fuel pump control unit [Gasoline engine]; [Gasoline engine 1.6 l]: Lambda probe heater, Lambda probe heater 1 after catalytic converter
21	30	[Gasoline engine 1.0 l]: Fuel pump control unit, Brake system vacuum pump
22	5	Brake light switch, Clutch pedal position sensor
23	15	Mass air meter, Charge pressure control solenoid valve, EGR cooler switch valve, Oil pressure control valve, Cylinder head cooling circuit valve, Gas cut-off valve relay, High pressure valve for gas operation, Charge air cooling pump
23	15	Fuel pressure regulator, Charge air cooling pump
24	10	Radiator fan: Radiator fan control unit; Relay for reducing agent metering system: Reducer level sensor, Recovery pump, Reducer return pump; Canister solenoid valve 1, Intake camshaft adjustment valve 1, Exhaust camshaft adjustment valve 1, Gas injection valve 1, 2, 3 and 4, Oil pressure adjustment valve, Coolant circulation pump 2, Charge air cooling pump, Heater circulation pump
25	60	ABS control unit, ABS hydraulic pump
26	30	On-board power control unit, Front left headlight, Adaptive lighting system left headlight bulb, Left headlight discharge lamp control unit, Left daytime running lamps and front side headlamps control unit, Left fog lamp bulb or right fog lamp bulb, Left daytime running lamps bulb, Front right lamp bulb, Left rear lamp bulb, Front left turn signal lamp, Rear right turn signal lamp, Right brake light bulb, Left reversing light bulb, Right turn signal repeater bulb, Left low beam bulb, Left high beam bulb, Left low beam bulb, Left high beam bulb, Left low beam headlamp flap
27	50	Glow plug control unit
28	40	Fuse 56 in the passenger compartment fuse box, Inverter with 12V/230V socket
28	60	Windshield heater relay: Windshield heater element
29	30	Special vehicles: Fuse 18 and 19 in the passenger compartment fuse box
29	50	Special vehicles: Fuse 39 in the passenger compartment fuse box, Fuse 51 in the passenger compartment fuse box, Fuses 54 and 55 in the passenger compartment fuse box, Fuses 59 and 60 in the passenger compartment fuse box
30	50	Trailer Driving: Fuse 40, 41 and 42 in the passenger compartment fuse box
R1		Main relay, Power relay terminal 30
R2		Gas shutoff valve relay
SA1	200	Alternator (110A); Alternator (140A/180A)
SA1	400	Alternator (140A/180A)
SA2	80	Power steering control unit: Power steering motor
SA3	50	Radiator fan: Radiator fan control unit, radiator fan, radiator fan 2
SA4	80	Contact relief relay X [Cars without Climatronic only]: Interior fuse box: No. 20 – No. 24 and No. 43 – No. 53
SA5	80	Interior fuse box: No. 20 – No. 24 and No. 43 – No. 53
SA6	40	Low power heating relay: Heating element for auxiliary air heater
SA7	80	High power heating relay: Heating element for auxiliary air heater
TV2		Protection of all circuits in underhood block

There are also videos on this topic on our YouTube channel.

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

Volkswagen Passat (B8; 2015 – 2019) – fuse and relay box diagram

Posted on 9 July 202510 July 2025 by admin

Volkswagen Passat (B8; 2015 – 2019) – fuse and relay box diagram

Year of production: 2014, 2015, 2016, 2017, 2018, 2019

This article covers the eighth-generation Volkswagen Passat (B8), manufactured from 2014 to 2022. It includes fuse box diagrams for the 2014 through 2019 models, provides information on the locations of the fuse panels inside the vehicle, and details the purpose and layout of each fuse and relay.

Passenger Compartment Fuse Box (Fuse Panel C -SC-)

Fuse Box Diagram

Volkswagen Passat (B8; 2015 - 2019) - fuse and relay box diagram -passenger compartment (fuse panel C) — Volkswagen Passat (B8; 2015 – 2019) – fuse and relay box diagram -passenger compartment (fuse panel C)

Assignment of the fuses in the instrument panel fuse box

№	Amps	Function / component
SC1	30 A	Control unit for reducing agent heater
SC2	10 A	Steering column electronics control unit
SC3	–	–
SC4	7.5 A	Alarm horn
SC5	5 A / 7.5 A	Data bus diagnostic interface
SC6	5 A / 7.5 A	Anti-theft alarm sensor Selector lever
SC7	10 A	Heater and air conditioning controls Selector lever Remote control receiver for auxiliary coolant heater Heated rear window relay Analogue clock Operating and display unit for rear air conditioning system Tyre Pressure Monitoring System control unit Magnetic clutch relay
SC8	10 A / 7.5 A	Rotary light switch Electromechanical parking brake button Rain and light sensor Diagnostic connection Anti-theft alarm sensor Front interior light Light for left dashboard background lighting Light for right dashboard background lighting Light for front left door contour lighting Light for front right door contour lighting Light for rear left door contour lighting Light for rear right door contour lighting Control unit for cornering light and headlight range control
SC9	1 A / 5 A / 7.5 A	Steering column electronics control unit
SC10	7.5 A / 10 A	Display unit for front information display and operating unit control unit TV tuner Control unit for Head-up Display CD player
SC11	25 A / 40 A	Control unit for front left belt tensioner Onboard supply control unit Front left headlight
SC12	5 A / 7.5 A / 20 A	Control unit 1 for information electronics
SC13	15 A / 25 A	Electronically controlled damping control unit Control unit for front left belt tensioner
SC14	30 A / 40 A	Fresh air blower control unit
SC15	10 A	Control unit for electronic steering column lock
SC16	7.5 A	Two-way signal amplifier for mobile telephone/data services Storage compartment with interface for mobile telephone USB hub Chip card reader TV tuner
SC17	5 A / 7.5 A	Dash panel insert Emergency call module control unit and communication unit Telematics control unit for real-time monitoring
SC18	7.5 A	Reversing camera Rear lid handle release button Control unit for overhead view camera Rear overhead view camera
SC19	7.5 A	Interface for entry and start system
SC20	7.5 A / 10 A	Relay for reducing agent metering system
SC21	15 A	All-wheel drive control unit
SC22	15 A	Trailer detector control unit
SC23	40 A / 20 A	Onboard supply control unit Front right headlight Sliding sunroof adjustment control unit
SC24	30 A / 40 A	Sliding sunroof adjustment control unit Onboard supply control unit Front right headlight
SC25	30 A	Driver door control unit (Only left-hand drive models) Front passenger door control unit (Only right-hand drive models) Rear left door control unit Rear left window regulator motor
SC26	30 A	Onboard supply control unit Seat heating
SC27	30 A / 40 A	Digital sound package control unit Onboard supply control unit
SC28	20 A / 25 A	Trailer detector control unit
SC29	–	–
SC30	10 A	High-voltage battery 1 Maintenance connector for high-voltage system
SC31	30A / 40 A	Onboard supply control unit Front left headlight Rear lid control unit
SC32	7.5 A / 10 A	Front camera for driver assist systems Adaptive cruise control unit Parking aid control unit Park assist steering control unit Blind Spot Monitor control unit Blind Spot Monitor control unit 2
SC33	5 A / 7.5 A	Airbag control unit Warning lamp for airbag deactivated on front passenger side
SC34	7.5 A	Electromechanical parking brake button Interior mirror Relay for power sockets Pedestrian protection warning lamp Switch module 2 in centre console Pressure sender for refrigerant circuit External air quality and air humidity sensor
SC35	7.5 A / 10 A	Diagnostic connection Headlight range control and instrument illumination regulator Control unit for cornering light and headlight range control Front left headlight Left headlight range control motor Front right headlight Right headlight range control motor
SC36	5 A / 7.5 A	Front right headlight Output module 1 for right LED headlight
SC37	5 A / 7.5 A	Front left headlight Output module 1 for left LED headlight
SC38	25 A	Trailer detector control unit
SC39	30 A	Front passenger door control unit (Only left-hand drive models) Driver door control unit (Only right-hand drive models) Rear right door control unit Rear right window regulator motor
SC40	20 A	Cigarette lighter 12V socket 12V socket 2 12V socket 3
SC41	25 A	Control unit for front right belt tensioner
SC42	40 A	Onboard supply control unit Central locking
SC43	30 A / 40 A	Onboard supply control unit Digital sound package control unit
SC44	15 A	Trailer detector control unit
SC45	15 A	Driver seat lumbar support adjustment switch Driver seat adjustment operating unit Driver seat adjustment control unit Operating unit for front left seat adjustment Massage control unit Front left seat cushion fan 1 Front left seat backrest fan 1
SC46	30 A	DC/AC converter with socket, 12V – 230V
SC47	15 A / 7.5 A	Rear window wiper motor Rear roller blind control unit
SC48	7.5 A	Engine sound generator control unit
SC49	5 A / 7.5 A	Clutch position sender Starter relay 1 Starter relay 2 High-voltage battery 1
SC50	40 A	Rear lid control unit
SC51	25 A	Operating and display unit for rear air conditioning system
SC52	15 A	Electronically controlled damping control unit
SC53	30 A	Heated rear window relay
R1		Relay for reducing agent metering system
R2		Magnetic clutch relay
R3		–
R4		Terminal 15 voltage supply relay
R5		Heated rear window relay
R6		Relay for power sockets

Fitting location of front passenger seat adjustment thermal fuse

Assignment of the fuses in the front passenger seat adjustment thermal fuse

№	Amps	Function/component
A	15 A	Operating unit for front right seat adjustment Front right lumbar support adjustment switch Front right seat cushion fan 1 Front right seat backrest fan 1
B	–

Engine Compartment Fuse Box (Fuse panels B -SB- & A -SA-)

Fuse Box Diagram

Volkswagen Passat (B8; 2015 - 2019) - fuse and relay box diagram -engine compartment (fuse panel B and A) — Volkswagen Passat (B8; 2015 – 2019) – fuse and relay box diagram -engine compartment (fuse panel B and A)

Assignment of the fuses in the engine compartment fuse box

№	Amps	Function / component
SB1	25 A / 40 A	ABS control unit
SB2	40 A	ABS control unit ABS hydraulic pump
SB3	15 A / 30 A	Engine/motor control unit
SB4	10 A / 5 A / 7.5 A	Radiator fan Oil level and oil temperature sender Relay for reducing agent metering system High heat output relay Low heat output relay Charge pressure positioner Activated charcoal filter solenoid valve 1 Exhaust camshaft control valve 1 Camshaft control valve 1 Valve for oil pressure control Inlet cam actuator for cylinder 2 Exhaust cam actuator for cylinder 2 Inlet cam actuator for cylinder 3 Exhaust cam actuator for cylinder 3 Fuel cooling valve Exhaust gas recirculation cooler changeover valve Charge pressure control solenoid valve Turbocharger air recirculation valve Power steering control unit
SB5	10 A	Fuel pressure regulating valve Fuel metering valve Camshaft control valve 1 Exhaust cam actuator A for cylinders 1-4 Exhaust cam actuator B for cylinders 1-4 Injector, cylinders 1-4 Engine component current supply relay Coolant valve for gearbox Coolant pump for high-voltage battery Coolant pump for high-temperature circuit
SB6	5 A / 7.5 A	Brake light switch
SB7	10 A / 15 A / 7.5 A	Fuel metering valve Circulation pump Radiator blind control motor Coolant valve for cylinder head Valve for oil pressure control Exhaust gas recirculation cooler changeover valve Charge pressure positioner Coolant pump for high-temperature circuit Charge air cooling pump Auxiliary pump for heating Coolant valve for gearbox Coolant shut-off valve Gearbox oil cooling pump Fuel pressure regulating valve Coolant changeover valve 2 Coolant changeover valve 1 Coolant pump for low-temperature circuit
SB8	10 A / 15 A	Lambda probe 1 before catalytic converter Lambda probe heater Lambda probe 1 after catalytic converter Lambda probe 1 heater after catalytic converter NOx sender
SB9	20 A / 5 A / 10 A / 7.5 A	Ignition coils 1-4 with output stage Heater element for crankcase breather Automatic glow period control unit Air mass meter Charge air cooling pump Activated charcoal filter solenoid valve 1 Exhaust camshaft control valve 1 Camshaft control valve 1
SB10	20 A / 10 A / 15 A	Fuel pump control unit
SB11	40 A	Auxiliary air heater element
SB12	40 A	Auxiliary air heater element
SB13	30 A / 15 A / 7.5 A	Mechatronic unit for dual clutch gearbox Dual clutch gearbox Auxiliary hydraulic pump 1 for gearbox oil Brake servo
SB14	40 A / 30 A	Heated windscreen relay
SB15	15 A	Horn relay
SB16	10 A / 20 A	Engine component current supply relay Power and control electronics for electric drive Charging unit 1 for high-voltage battery
SB17	7.5 A	Main relay Terminal 30 voltage supply relay Engine/motor control unit ABS control unit Heated windscreen relay
SB18	5 A / 7.5 A	Battery monitor control unit Data bus diagnostic interface
SB19	30 A	Wiper motor control unit
SB20	10 A	Alarm horn
SB21	30 A / 15 A	Heated windscreen relay 2 Mechatronic unit for dual clutch gearbox Dual clutch gearbox Auxiliary hydraulic pump 1 for gearbox oil
SB22	5 A / 7.5 A	Engine/motor control unit
SB23	30 A	Starter
SB24	40 A	Auxiliary air heater element Brake servo
SB25	–	–
SB26	–	–
SB27	–	–
SB28	–	–
SB29	–	–
SB30	–	–
SB31	–	–
SB32	30 A	Heated windscreen (Only models with battery at rear)
SB33	15 A / 30 A	Mechatronic unit for dual clutch gearbox Dual clutch gearbox Brake system pressure accumulator
SB34	5 A / 30 A	Brake servo Heated windscreen (Only models with battery at front)
SB35	30 A / 7.5 A	Wiper motor control unit Air conditioning system relay
SB36	–	–
SB37	20 A	Auxiliary heater control unit
SB38	–	–
SA1	125 A / 80 A	Supply for fuse holder C -SC- Fuses on fuse holder C: 2, 14, 22, 31, 38, 41, 46, 51, 53 Relay for power sockets Terminal 15 voltage supply relay Radiator fan (Only models with battery at rear)
SA2	400 A	Alternator
SA3	80 A	Power steering control unit (Only models with battery at front)
SA4	80 A	Supply for fuse holder C Terminal 30 Fuses on fuse holder C: 1, 3, 15, 21, 23, 28, 43, 45, 50 Power steering control unit (Only models with battery at rear)
SA5	50 A	Radiator fan Supply for fuse 4 on fuse holder A Power steering control unit (Only models with battery at rear)
R1		Starter relay 1
R2		Starter relay 2
R3		Horn relay
R4		High heat output relay (Only models with auxiliary air heater)
R5		Main relay (Only models with petrol engine) Terminal 30 voltage supply relay (Only models with diesel engine)
R6		Automatic glow period control unit (Only models with diesel engine) Coolant shortage indicator control unit (Only models with hybrid drive system)
R7		Low heat output relay (Only models with auxiliary air heater)
R8		Air conditioning system relay (Only models with hybrid drive system) Engine component current supply relay (Only models with a 1.8–2.0l petrol engine)
R9		Heated windscreen relay 1
R10		Heated windscreen relay 2

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

Volkswagen Passat (B9; 2024 – 2025) – fuse and relay box diagram

Posted on 9 July 20259 July 2025 by admin

Volkswagen Passat (B9; 2024 – 2025) – fuse and relay box diagram

Year of production: 2024, 2025

This article focuses on the ninth-generation Volkswagen Passat (B9), produced in 2024 and 2025. It includes fuse box diagrams for the 2024 and 2025 models, provides details on the locations of the fuse panels within the vehicle, and explains the function and layout of each fuse and relay.