ABS Warning Light Remains ON

ANTI-LOCK BRAKE SYSTEM:

ABS Warning Light Remains ON

DESCRIPTION

During DTC read by SST (CHECK WIRE), if the ABS warning light remains on, troubleshoot by following this inspection flow.

HINT: Techstream may not be used when there is a malfunction in the ECU.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC
(a) Is DTC output?
Result:





B -- REPAIR CIRCUIT INDICATED BY OUTPUT DTC
A -- Continue to next step.
2. CHECK SKID CONTROL ECU CONNECTOR
NG -- CONNECT CONNECTOR TO ECU CORRECTLY
OK -- Continue to next step.
3. INSPECT BATTERY
(a) Check the battery voltage.
Standard voltage:
11 to 14 V
NG -- INSPECT CHARGING SYSTEM
OK -- Continue to next step.
4. INSPECT SKID CONTROL ECU TERMINAL VOLTAGE (IG1 TERMINAL VOLTAGE)
(a) WHEN USING TECHSTREAM:
(1) Connect Techstream to the DLC3.
(2) Start the engine.
(3) Select the Data List mode on Techstream.

ABS / VSC / TRAC:





(4) Read the voltage condition output from the ECU displayed on Techstream.
OK:
"Normal" is displayed.
(b) WHEN NOT USING TECHSTREAM:





(1) Disconnect the skid control ECU connector.
(2) Turn the ignition switch to the ON position.
(3) Measure the voltage according to the value(s) in the table below.
Standard voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - COMBINATION METER)





(a) Disconnect the skid control ECU connector and combination meter connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
6. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BODY GROUND)





(a) Disconnect the skid control ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE BRAKE ACTUATOR ASSEMBLY