3.
Turn ignition "ON" and measure voltage between terminal 7 of the ECM harness connector and chassis ground
Specification : Remain stable at battery voltage
Ignition "OFF".
Disconnect ECM connector.
Turn ignition "ON" and measure voltage between terminal 7 of the ECM harness connector and chassis ground
Specification : Remain stable at battery voltage
Are circuits remaining stable at battery voltage?
YES
▶ Test with a new ECM and check for proper operation. If problem is corrected, replace ECM and go to "Verification of Vehicle Repair" procedure.
NO
▶ If voltage fluctuates, check circuit Thoroughly for loose, bent or corroded terminals, Repair as necessary and go to "Verification of Vehicle Repair" procedure.
