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
A. Specification : Infinite




(4) Is resistance within the specification ?
YES
1) Go to next step as below
NO
1) Repair as necessary and go to "Verification of Vehicle Repair" procedure.
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
A. Specification : Approx. 0V




(3) Is voltage within the specification ?
YES
1) Go to next step as below
NO
1) Repair as necessary and go to "Verification of Vehicle Repair" procedure.
3. Check for open in signal circuit
(1) Ignition "OFF"
(2) Measure resistance between terminals 53 of the ECM harness connector and 3 of the ABS Control Module harness connector
A. Specification : Approx. 0 ohms




(3) Is resistance within the specification ?
YES
1) Check for poor connection between ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair" procedure
NO
1) Repair as necessary and go to "Verification of Vehicle Repair" procedure.

[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
A. Specification : Infinite




(5) Is resistance within the specification ?
YES
1) Go to next step as below
NO
1) Repair as necessary and go to "Verification of Vehicle Repair" procedure.
2. Check for short to battery 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
A. Specification : Approx. 0V




(4) Is voltage within the specification ?
YES
1) Go to next step as below
NO
1) Repair as necessary and go to "Verification of Vehicle Repair" procedure.
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.
A. Specification : Approx. 0 ohms




(4) Is resistance within the specification ?
YES
1) Check for poor connection between ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair" procedure
NO
1) Repair as necessary and go to "Verification of Vehicle Repair" procedure.