Inspection Procedure

1. Disconnect the connector from the HECU.
2. Measure the voltage between the terminals 9 (+) and 8 (-), 24 (-) of the HECU connector.

   Specification: Battery positive (+)

   Fig 1: Measuring Voltage Between Terminals 8 (-), 24 (-) Of HECU Connector

   Courtesy of HYUNDAI MOTOR CO.

Is the voltage within the specification?

NO 

1. Check ABS fuse (10A) and fusible link (30A).
2. Check and repair harness or connector.

YES 

• Check circuit for community to ground.

Fig 2: Measure Resistance Between Terminals 8 (-), 24 (-) Of HECU Connector And Body Ground

Courtesy of HYUNDAI MOTOR CO.

1. Disconnect the connector from the HECU.
2. Measure the resistance between terminals 8 (-), 24 (-) of the HECU connector and the body ground.

Is the resistance below 1Ω?

NO 

• Check and readjust the installing of the body ground.

YES 

• Test motor actuation by using hi-scan (pro)

Is the sound of motor operating heard?

YES 

• Check repair, if necessary, harness and connector.

NO 

• Replace the HECU then recheck.