ABS Warning Light Comes ON Steady

ABS Warning Light Comes ON Steady

Wiring Diagram

Refer to "Warning Diagram" under ABS Warning Light Does Not Come ON at Ignition Switch ON ABS Warning Light Does Not Come ON at Ignition Switch ON.

Circuit Description

Refer to "Circuit Description" under ABS Warning Light Does Not Come ON at Ignition Switch ON ABS Warning Light Does Not Come ON at Ignition Switch ON.

Troubleshooting



1. DTC check

Perform DTC check.

Is there any DTC(s)?
YES
Go to Step 7 of ABS Check.
NO
Go to Step 2.

2. ABS hydraulic unit / control module assembly power supply and ground circuit check

Check that ABS hydraulic unit / control module assembly power supply circuit and ground circuit is in good condition referring to ABS Hydraulic Unit / Control Module Assembly Power Supply and Ground Circuit Check ABS Hydraulic Unit / Control Module Assembly Power Supply and Ground Circuit Check.

Are check results OK?
YES
Go to Step 3.
NO
Repair ABS hydraulic unit / control module assembly power supply or ground circuit.

3. CAN communication line circuit check

Turn ignition switch to OFF position.
Disconnect connectors of all control modules communicating by means of CAN.
Check for proper connection to CAN communication line wire.
If OK then check CAN communication line circuit between control modules for open, short and high resistance.

Is each CAN communication line circuit in good condition?
YES
Substitute a known-good combination meter and recheck. If warning light remains ON, substitute a known-good ABS hydraulic unit / control module assembly and recheck.
NO
Repair circuit and recheck.