W/Harness Inspection

Signal Circuit Inspection

1. Check for short to ground in signal circuit
(1) Ignition "OFF"
(2) Disconnect ECM and ABS Control Module connectors
(3) Measure resistance between terminal 53 of the ECM harness connector and chassis ground

Specification : Infinite




(4) Is resistance within the specification ?





2. Check for short to battery in signal circuit
(1) Ignition "ON" & Engine"OFF"
(2) Measure voltage between terminal 53 of the ECM 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 terminals 53 of the ECM harness connector and 14 of the ABS 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 ECM and wheel speed sensor (front right) harness connector
(3) Measure resistance between terminal 55 of the ECM harness connector and chassis ground
(4) Measure resistance between terminal 56 of the ECM harness connector and chassis ground

Specification : Infinite




(5) Is resistance within the specification ?





2. Check for short to ground in Signal circuit
(1) Ignition "ON" & Engine"OFF"
(2) Measure voltage between terminal 55 of the ECM harness connector and chassis ground
(3) Measure voltage between terminal 56 of the ECM 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 terminals 1 of the wheel speed sensor harness connector and 56 of the ECM harness connector.
(3) Measure resistance between terminals 2 of the wheel speed sensor harness connector and 55 of the ECM harness connector.

Specification : Approx. 0 Ohms




(4) Is resistance within the specification ?