Air Conditioning H02

Fault Code 21

Outside Temperature Sensor - B+/Ground Short

Diagnostic conditions
- Ignition on
- No control unit fault stored
- No sensor supply voltage fault stored (5 V)

Possible cause of fault
- Short circuit to B+/ground/between wires or open circuit in wiring between air-conditioning system regulator and outside temperature sensor
- Outside temperature sensor faulty
- Air-conditioning system regulator faulty

Affected pins
Plug B, pin 5 and pin 9

Diagnosis/troubleshooting

Work Instruction 1 - 2:

Work Instruction 3 - 7:

Work Instruction 8 - 10: