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.
2012 Volkswagen CC (357) L4-2.0L Turbo (CCTA)FACTORY OEM SERVICE PROCEDURE
Climatronic Control Module J255 Pin Assignment, Manual Climate Control System, from 30 May 2011
Climatronic Control Module J255 Pin Assignment, Manual Climate Control System, from 30 May 2011
Special tools, testers and auxiliary items required
• Test Box (basic unit) (V.A.G 1598/14)
• Test adapter (V.A.G 1598/47)
• Template (V.A.G 1598/47-2)
5-pin Connector - A - in Wiring Diagram 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 Connector - B - in Wiring Diagram T16e
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 +5V
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 Connector - C - in Wiring Diagram T20c
5 High Pressure Sensor (G65)
7 CAN Bus Low
8 CAN Bus High
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
Factory Service Tools
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.
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