Knock Sensor: Testing and Inspection

DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE
WITH CONSULT
1) Turn ignition switch "ON" and select "DATA MONITOR" mode with CONSULT.
2) Start engine and run it for at least 5 seconds at idle speed.

OR

WITH GST
1) Start engine and run it for at least 5 seconds at idle speed.
2) Select "MODE 3" with GST.

OR

WITH NO TOOLS
1) Start engine and run it for at least 5 seconds at idle speed.
2) Turn ignition switch "OFF", wait at least 5 seconds and then turn "ON".
3) Perform "Diagnostic Test Mode II" (Self-diagnostic results) with ECM.




WIRING DIAGRAM




DIAGNOSTIC PROCEDURE

COMPONENT INSPECTION
- Use an ohmmeter which can measure more than 10 M Ohms.
1. Disconnect knock sensor harness connector.




2. Check resistance between terminal (2) and ground.

Resistance: 500 - 620 K Ohms at 25°C (77°F)

CAUTION:
- Discard any knock sensors that have been dropped or physically damaged. Use only new ones.