W/Harness Inspection

Signal Circuit Inspection

With ABS System
1. Check for short to ground in signal circuit
(1) Ignition "OFF"
(2) Disconnect PCM and ABS Control Module connectors
(3) Measure resistance between Vehicle speed input terminal of PCM harness connector and chassis ground.

Specification : Infinite Ohms





(4) Is resistance within the specification?





2. Check for short to battery in signal circuit
(1) Ignition "ON" & Engine"OFF"
(2) Measure voltage between Vehicle speed input terminal of PCM harness connector and chassis ground

Specification : Approx. 0V





(3) Is voltage within the specification?





3. Check for open in signal circuit
(1) Ignition "OFF"
(2) Measure resistance between Vehicle speed input terminal of PCM harness connector and Vehicle speed output terminal of ABS/ESP Control Module harness connector.

Specification : Approx. 0 Ohms





(3) Is resistance within the specification?





Without ABS system
1. Check for short to ground in Signal circuit
(1) Ignition "OFF"
(2) Disconnect PCM and wheel speed sensor (front right) harness connector.
(3) Measure resistance between signal '+' terminal of PCM harness connector and chassis ground.
(4) Measure resistance between signal '-' terminal of PCM harness connector and chassis ground.

Specification : Infinite Ohms





(5) Is resistance within the specification?





2. Check for short to battery in signal circuit
(1) Ignition "ON" & Engine"OFF"
(2) Measure voltage between signal '+' terminal of PCM harness connector and chassis ground.
(3) Measure voltage between signal '-' terminal of PCM harness connector and chassis ground.

Specification : Approx. 0V





(4) Is voltage within the specification?





3. Check for open in signal circuit
(1) Ignition "OFF"
(2) Measure resistance between signal '+' terminal of WSS harness connector and signal '+' terminal of PCM harness connector.
(3) Measure resistance between signal '-' terminal of WSS harness connector and signal '-' terminal of PCM harness connector.

Specification : Approx. 0 Ohms





(4) Is resistance within the specification?