Signal Circuit Inspection

WARNING: This page is about a different variant/trim than selected.

■ Check short to battery in harness

IG "OFF". Disconnect injector connector.
IG "ON".
Measure voltage between signal terminal of sensor harness connector and chassis ground.
Specification: Approx. 1.5 V
Is the measured voltage within specification?
YES
- Go to next step below.
NO
- Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

■ Check short to ground in harness

IG "OFF". Disconnect knock sensor connector and PCM connector.
Measure resistance between signal terminal of the sensor harness connector and chassis ground.
Specification: Infinite
Is the measured resistance within specification?
YES
- Go to next step below.
NO
- Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

■ Check open in signal harness

IG "OFF". Disconnect knock sensor connector and PCM connector.
Measure resistance between signal terminal of sensor harness connector and Knock signal terminal of the PCM harness connector.
Specification: Approx. 0 Ω
Is the measured resistance within specification?
YES
- Go to "GROUND CIRCUIT INSPECTION " procedure.
NO
- Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.