Test Description
NOTE:
Test numbers refer to numbers on diagnostic chart.
- If QDM No. 4 related symptoms are present, checks on Code P1670 (2 OF 2) chart should isolate cause of fault.
- Determines which circuit is out of specification.
- Determines if problem is circuit or component.
- As factory installed PCM is protected with an internal circuit breaker, it is highly unlikely that PCM needs to be replaced.