Inspection Procedure

1. Clear the DTC using the Hi-Scan (pro).
2. Turn the ignition switch OFF.
3. Turn the ignition switch ON, and check if the same DTC is stored in the memory.

Is the same DTC output?

NO 

• Problem is intermittent and the HECU memory was not cleared.

YES 

• Check power source of valve relay

1. Disconnect the connector from the HECU.
2. Measure the voltage between the terminals 25 and 8, 24 of the HECU connector.

   Specification: Battery positive (B+)

   Fig 1: Measuring Voltage Between Terminals 25 And 8, 24 Of HECU Connector

   Courtesy of HYUNDAI MOTOR CO.

   Is the voltage within the specification?

   NO 

3. Check and replace fuse (10A) and fusible link (30A).
4. Check and repair harness or connector.

   YES 

   • Check circuit for continuity to ground.

1. Disconnect the connector from the HECU.
2. Measure the resistance between terminals 8 (-), 24 (-) of the HECU connector and the body ground.
   Fig 2: Measuring Resistance Between Terminals 8 (-), 24 (-) Of HECU Connector And Body Ground

   Courtesy of HYUNDAI MOTOR CO.

Is the resistance below 1Ω?

NO 

• Check and readjust the installing of the body ground.

YES 

• Replace the HECU then recheck.