Fault Code 1491

Fault code 1491

Glow pin for heating

Diagnostic conditions
- Ignition on
- Internal auxiliary heater control unit function test

Possible cause of fault
- Electrical fault in electric circuit (plug contact problem)
- Short circuit to ground
- Short circuit to B+
- Open circuit in wiring
- Auxiliary heater control unit faulty

Affected pins
-

Diagnosis/troubleshooting