Fault Code 21

Fault Code 21

Outside Temperature Sensor - Short Circuit To B+/Short Circuit To Ground

Diagnostic conditions
- Ignition on
- No control module fault stored
- No fault with power supply sensors (5 V) stored

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

Affected pins
Connector B, pin 5 and pin 9

Diagnosis/troubleshooting

Work Instruction 1 - 5:

Work Instruction 6 - 10: