CAN Circuit Inspection (EPS ↔ ECM)

■ Open Check 

1. Ignition "OFF".
2. Disconnect EPS CM & ECM connector.
3. Measure resistance between CAN HIGH terminal of the EPS CM harness connector and CAN HIGH terminal of the ECM harness connector.
4. Measure resistance between CAN LOW terminal of the EPS CM harness connector and CAN LOW terminal of the ECM harness connector.

   Specification:  Approx. below 1

   Fig 1: Measuring Resistance Between EPS CM And ECM Harness Connectors

   Courtesy of HYUNDAI MOTOR AMERICA
5. Is the measured resistance within specifications?

   YES 

   • Go to "COMPONENT INSPECTION " procedure.

   NO 

   • Check Open between EPS CM & engine ECU harness. Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.