DTC P1386: Knock Sensor Control Zero Test: Procedure
NOTE:
Record all freeze frame data before disconnecting any connectors or clearing DTCs.
- Turn ignition off. Disconnect ECM 88-pin connector. Check for continuity between ECM connector terminals No. 70 and 71 (Yellow/Blue wire and Black/Green wire). See Figure. If continuity does not exist, go to next step. If continuity exists, go to step 3.
- Check for continuity between ground and ECM connector terminals No. 70 (Yellow/Blue wire) and No. 71 (Black/Green wire). See Figure. If continuity exists between ground and either terminal, repair short to ground in appropriate wire between knock sensor and ECM. If continuity does not exist between ground and either terminal, check connectors for loose, damaged or corroded terminals. If problem exists, repair appropriate connector. If problem does not exist, replace knock sensor.
- Disconnect knock sensor connector. Check for continuity between ECM connector terminals No. 70 and 71 (Yellow/Blue wire and Black/Green wire). If continuity exists, repair shorted wires between knock sensor and ECM. If continuity does not exist, replace knock sensor.