Test 9 - Knock Sensor (Code 66)
- Unplug ECU connectors at ECU, and at knock sensor. Check resistance across sensor. Resistance should be more than 1000 ohms. Replace sensor if resistance is different.
- If resistance is okay, check continuity of circuit as indicated in table. If resistance are incorrect, repair or replace harness.
TESTING KNOCK SENSOR CIRCUIT
| Wire Color | ECU Connector Terminal No. | Resistance (Ohms) |
|---|---|---|
| White | 37 | 0 |
| Ground | 37 | Infinity |
| Black | 28 | 0 |