Signal Circuit Inspection

Open or Short Check 

1. IG "OFF".
2. Disconnect HECU and EPS(SAS) connector.
3. Measure resistance between CAN HIGH(LOW) terminal of the HECU harness connector and CAN HIGH(LOW) terminal of the EPS(SAS) harness connector.

Specification : Approx. below 1Ω

Fig 1: Measuring Resistance Between CAN HIGH(LOW) Terminal Of HECU Harness Connector & CAN HIGH(LOW) Terminal Of EPS(SAS) Harness Connector
Courtesy of HYUNDAI MOTOR CO.
4. Is the measured value within specifications?

   YES 

   • Go to "Component Inspection " procedure.

   NO 

   • Repair open in CAN BUS line between HECU harness connector and EPS(SAS) ECU harness connector and then go to "Verification Of Vehicle Repair " procedure.