Signal Circuit Inspection

Lift the vehicle.
Ignition "ON".
Turn the wheel with hand.

Measure waveform between terminal of the HECU harness connector and chassis ground.

Specification: Approx. High: 1.05 V, Low: 0.525 V

Fig 1: Measuring Waveform Between Terminal Of HECU Harness Connector And Chassis Ground

G06412613

Courtesy of KIA MOTORS AMERICA, INC.

DTC CHART

DTC	LOCATION	HECU harness connector (Signal)
DTC	LOCATION	ABS	ESC
DTC C1200	Front Left	5	5
DTC C1203	Front Right	10	10
DTC C1206	Rear Left	17	27
DTC C1209	Rear Right	19	29

Is the measured waveform within specifications?
YES
- Substitute with a known-good HECU and check for proper operation. If problem is corrected, replace HECU and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- Check for open or short to GND in wheel speed sensor harness between terminal "FL, FR: 1, RL, RR: 1" of the wheel speed sensor harness connector and terminal of the HECU harness connector. Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
- If OK, Go to "COMPONENT INSPECTION " procedure.