Fault Code 21

Fault Code 21

Outside temperature sensor - short to B+/ short to ground

Diagnostic conditions
- Ignition on

NOTE:
- No control module fault stored
- No fault with supply voltage (5 V)

Possible cause of fault
- Short circuit to voltage/ground or open circuit in the wiring between the air-conditioning system regulator and the outside temperature sensor
- Temperature sensor faulty

Affected terminals
Plug B, terminals 5 and 9

Diagnosis/troubleshooting

Diagnosis/troubleshooting: