CHECK KNOCK SENSOR.

1) Disconnect the connector from knock sensor.

2) Measure the resistance between knock sensor terminals.

Terminals

No. 1 — No. 2:

QUESTION

Is the resistance less than 500 kΩ?

Yes No

Replace the knock sensor.

Repair the ground short circuit of harness between the ECM and knock sensor connector.

NOTE:

The harness between both connectors are shielded. Remove the shield and repair the short circuit of the harness circuit.