ABS Warning Light Remains ON

BRAKE CONTROL: ANTI-LOCK BRAKE SYSTEM (for Sedan): ABS Warning Light Remains ON

ABS Warning Light Remains ON

DESCRIPTION

If any of the following conditions are detected, the ABS warning light remains on:
1. The ECU connectors are disconnected from the skid control ECU.
2. There is a malfunction in the skid control ECU internal circuit.
3. There is an open or short in the wire harness between the combination meter and the skid control ECU.
HINT: The Techstream may not be used when there is a malfunction in the skid control ECU.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK CAN COMMUNICATION SYSTEM
(a) Check if the CAN communication system DTC is output Diagnosis System.
Result:






B -- REPAIR CAN COMMUNICATION SYSTEM
A -- Continue to next step.
2. CHECK CONNECTOR CONNECTION CONDITION
(a) Check the skid control ECU connector condition.
OK:
The connector is securely connected.
NG -- CONNECT CONNECTOR CORRECTLY
OK -- Continue to next step.
3. PERFORM ACTIVE TEST USING TECHSTREAM (ABS WARNING LIGHT)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the tester on.
(d) Select the following menu items: Body / Combination Meter / Active Test.

ACTIVE TEST: Combination Meter





(e) Check that the ABS warning light turns on and off in the combination meter using the Techstream.
OK:
The ABS warning light turns ON and OFF in accordance with the Techstream operation.
HINT: When the ABS warning light remains illuminated, an open in the wire harness of the combination meter or abnormalities in the meter circuit should be considered.

NG -- CHECK COMBINATION METER CIRCUIT
OK -- REPLACE BRAKE ACTUATOR