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:
REASSEMBLY CAUTION / NOTICE / HINT NOTICE: This procedure includes the installation of small-head bolts. Refer to Small-Head Bolts of Basic Repair Hint to identify the small-head bolts. Click here
PROCEDURE 1. INSTALL RING PIN NOTICE: It is not necessary to remove the ring pins unless they are being replaced...
PARTS LOCATION ILLUSTRATION
*1 BRAKE MASTER CYLINDER RESERVOIR ASSEMBLY - BRAKE FLUID LEVEL WARNING SWITCH *2 THERMISTOR ASSEMBLY *3 ECM *4 BRAKE ACTUATOR ASSEMBLY - SKID CONTROL ECU ILLUSTRATION
*1 HEADLIGHT ASSEMBLY RH *2 HEADLIGHT ASSEMBLY LH *3 HEADLIGHT UNIT ASSEMBLY RH *4 HEADLIGHT UNIT ASSEMBLY LH *5 HEADLIGHT CORD *6 OUTER REAR VIEW MIRROR ASSEMBLY RH - SIDE TURN SIGNAL LIGHT ASSEMBLY RH *7 OUTER REAR VIEW MIRROR ASSEMBLY LH - SIDE TURN SIGNAL LIGHT ASSEMBLY LH *8 REAR COMBINATION LIGHT ASSEMBLY RH *9 REAR COMBINATION LIGHT ASSEMBLY LH *10 REAR TURN SIGNAL LIGHT LED ILLUSTRATION
*1 MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) *2 POWER DISTRIBUTION BOX ASSEMBLY - ECU-DCC NO...
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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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