P1386

CONTROL MODULE, KNOCK SENSOR CIRCUITRY





Fault Symptom.
Engine performance may be down due to continuous retardation of the ignition timing.

Conditions.
Fault in the control module's internal electronic circuits for signal conditioning of the knock sensor signal.





Diagnostic Procedure.
1. Final check

- Clear the diagnostic trouble code.
- Implementation of driving cycle:
^ Drive the car at varying engine loads and rpm for 5 minutes.
- Evaluation of driving cycle:
^ Check whether the diagnostic trouble code has recurred.

Has the diagnostic trouble code recurred?
YES: Continue at "Before Replacing a Control Module". Component Tests and General Diagnostics
NO: No steps to be taken.