Toyota Yaris: Vehicle Stability Control System / ABS Warning Light Remains ON
DESCRIPTION
This procedure is for troubleshooting when the ABS warning light remains on but no DTCs are output.
The skid control ECU (brake actuator assembly) controls the ABS warning light in the combination meter assembly via CAN communication.
CAUTION / NOTICE / HINT
NOTICE:
-
After replacing the skid control ECU (brake actuator assembly), perform "Calibration".
Click here
-
Before performing this procedure, depress the brake pedal and confirm that the stop lights illuminate.
PROCEDURE
1. | CHECK GTS OUTPUT (CAN COMMUNICATION SYSTEM) |
(a) Operate the GTS, and check for DTCs related to the CAN communication system.
Click here
Result | Proceed to |
Any CAN communication system relating DTCs are output | A |
None of the above conditions are met | B |
A |
| INSPECT CAN COMMUNICATION SYSTEM |
B |
| |
2. | INSPECT COMBINATION METER ASSEMBLY |
(a) Perform the Active Test of the combination meter assembly using the GTS.
Body Electrical > Combination Meter > Active Test
Tester Display |
ABS Warning |
(b) Check the combination meter assembly.
OK:
The ABS warning light turns on or off in accordance with the GTS operation.
OK |
| REPLACE BRAKE ACTUATOR ASSEMBLY |
NG |
| INSPECT METER / GAUGE SYSTEM |
DESCRIPTION The skid control ECU (brake actuator assembly) receives signals from the ECM, steering sensor and airbag sensor assembly via CAN communication...
DESCRIPTION The skid control ECU (brake actuator assembly) controls the ABS warning light in the combination meter assembly via CAN communication. CAUTION / NOTICE / HINT NOTICE: After replacing the skid control ECU (brake actuator assembly), perform "Calibration"...
Other information:
DESCRIPTION If recirculation/fresh mode changes unintentionally and without permission, the following causes are possible. Symptom Factor
Recirculation/fresh mode changes without permission
Recirculation/fresh mode light blinks
Customize setting
Change in ambient air temperature
Decrease in refrigerant pressure
Air conditioner pressure sensor circuit malfunction
Engine coolant temperature (high)
PROCEDURE 1...
DESCRIPTION Detection Item Symptom Trouble Area Skid Control ECU Communication Stop Mode Communication stop for "Skid Control (ABS/VSC/TRAC)" is indicated on the "Communication Bus Check" screen of the GTS. Click here
Brake actuator assembly branch line or connector
Power source circuit of brake actuator assembly
Brake actuator assembly ground circuit
Brake actuator assembly
WIRING DIAGRAM
CAUTION / NOTICE / HINT CAUTION: When performing the confirmation driving pattern, obey all speed limits and traffic laws...
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WARNING
When removing the fuel-filler cap, loosen the cap slightly and wait
for
any hissing to stop, then remove it
Fuel spray is dangerous. Fuel can burn skin and eyes and cause illness
if
ingested. Fuel spray is released when there is pressure in the fuel tank and
the fuel-filler cap is removed too quickly.
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