Check for short to ground in signal circuit
Ignition "OFF"
Disconnect ECM and ABS Control Module connectors
Measure resistance between terminal 53 of the ECM harness connector and chassis ground
Specification : Infinite
Is resistance within the specification?
YES
▶ Go to next step as below
NO
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.
Check for short to battery in signal circuit
Ignition "ON" & Engine"OFF"
Measure voltage between terminal 53 of the ECM harness connector and chassis ground
Specification : Approx. 0V
Is voltage within the specification?
YES
▶ Go to next step as below
NO
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.
Check for open in signal circuit
Ignition "OFF"
Measure resistance between terminals 53 of the ECM harness connector and 14/E47 of the ABS Control Module harness connector.
Measure resistance between terminals 53 of the ECM harness connector and 21/E46 of the ESP Control Module harness connector.
Specification : Approx. 0Ω
Is resistance within the specification?
YES
▶ 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
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.
