DTC 34: Knock Sensor
NOTE:
The knock sensor has a sub-harness assembly. This test is performed at the wiring harness-to-sub-harness connector.
- Check Input Signal Circuit - Turn ignition off. Disconnect ECM wiring harness connector and knock sensor sub-harness connector. See Figure and Fig 1 . Check continuity between wiring harness connector terminal "a" (White wire) and ECM terminal No. 27 (White wire). See Figure and Fig 2 . If continuity is present, go to next step. If continuity is not present, repair harness or connectors as necessary.
- Check Component - Inspect knock sensor. See I SYS/COMP TESTS article in the ENGINE PERFORMANCE section. Replace knock sensor if necessary and perform FINAL CHECK in this article. If knock sensor is okay, repair ECM pin terminals and/or wiring harness connector.