Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Multi-Pin Connector Assignment On Rear Of Front A/C Display Control Head
Special tools and workshop equipment required
- Adapter Cable V.A.G 1598/47
- Template V.A.G 1598/47-2
- Test box (Basic Unit) V.A.G 1598/14
5-Pin Harness Connector -A-, T5
1 - 3rd blower speed
2 - 2nd blower speed
3 - 1st Blower speed
4 - 4th blower speed
5 - Terminal X and depending on the vehicle equipment level Auxiliary Heater Operation Relay -J485-
16-Pin Harness Connector -B-, T16
1 - Temperature door motor -V68- - set to warm
2 - Evaporator temperature sensor -G308-
3 - Air distribution door motor position sensor -G645-
5 - Temperature regulator door motor position sensor -G92-
7 - +5 volt
8 - Ground signal
9 - Recirculation door motor -V113- set to open
10 - Recirculation door motor -V113- set to closed
11 - Temperature door motor -V68- set to cold
12 - Air distribution door motor -V428-, set to position 1
13 - Air distribution door motor -V428-, set to position 2
20-Pin Harness Connector -C-, T20a
5 - High Pressure Sensor -G65-
7 - Low speed CAN Bus
8 - High speed CAN Bus
12 - Right seat heater (optional)
13 - Left seat heater (optional)
15 - Terminal 75 seat heater (optional)
16 - A/C Compressor Regulator Valve -N280-
19 - Terminal 30A
20 - Terminal 31
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.