Open Check
- Ignition "OFF" & Engine "OFF".
- Disconnect HECU and ECM connector.
- Measure resistance between CAN HIGH, LOW terminal of the HECU harness connector and CAN HIGH, LOW terminal of the ECM harness connector.
Specification : Approx. 0Ω
- Is the measured resistance within specifications?
YES:
- Go to "COMPONENT INSPECTION " procedure.
NO:
- Repair open in CAN BUS line between HECU harness connector and ECM harness connector and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.