Hyundai Tucson: Even After The Engine Is Started, The ABS Warning Lamp Remains ON

Detecting condition

If the HECU detects trouble, it lights the ABS warning lamp while at the same time prohibiting ABS control. At this time, the HECU records a DTC in memory. Even though the normal code is output, the ABS warning lamp remains ON, then the cause may be probably an open or short in the ABS warning lamp circuit.

• An open in the wire
• Faulty instrument cluster assembly
• Faulty ABS warning lamp module
• Faulty HECU

Inspection procedures

Check DTC Output

1. Connect the diagnostic tool to the 16P data link connector located behind the driver's side kick panel.
2. Check the DTC output using diagnostic tool.
3. Is DTC output?

Perform the DTC troubleshooting procedure (Refer to DTC troubleshooting).

Check the CAN circuit resistance for ABS warning lamp.

Check the CAN circuit resistance for ABS warning lamp

1. Disconnect the instrument cluster connector (M08) and turn the ignition switch OFF.
2. Measure the resistance between terminal (M08) 32 and 33 of the cluster harness side connector.

Specification : 60

3. Is resistance within specification?

Repair ABS warning lamp bulb or instalment cluster assembly.

Check the CAN circuit wiring for ABS warning lamp.

Check the CAN circuit wiring for ABS warning lamp

1. Disconnect the instrument cluster connector (M08) and ESC HECU connector, and then turn the ignition switch OFF.
2. Check for continuity between terminal (M08) 32 of the cluster harness side connector and terminal 26 of ESC HECU harness side.

Check for continuity between terminal (M08) 33 of the cluster harness side connector and terminal 14 of ESC HECU harness side.

Specification : Below 1

3. Is resistance within specification?

Repair short of wiring between terminal 26. 14 of ESC HECU harness connector and ABS warning lamp module.

Repair open of wiring between terminal 26, 14 of ESC HECU harness connector and ABS warning lamp module.

Terminal Function

ABS/ESC

ESC MOCI

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