Toyota Yaris: Vehicle Stability Control System / ABS Operates Before Necessary When Braking
DESCRIPTION
Troubleshooting for when ABS operates too soon due to a noisy signal from the speed sensor, a difference in output, etc.
CAUTION / NOTICE / HINT
NOTICE:
-
After replacing or removing and installing a speed sensor, perform Dealer Mode (Signal Check) inspection to confirm that the speed sensors are operating correctly.
Click here
-
After replacing or removing and installing a speed sensor rotor, perform Dealer Mode (Signal Check) inspection to confirm that the speed sensors are operating correctly.
Click here
PROCEDURE
| 1. | PERFORM DEALER MODE (SIGNAL CHECK) INSPECTION (SPEED SENSOR CHECK) |
(a) Using the GTS, perform a Dealer Mode (Signal Check) inspection sensor check and check that speed sensor Dealer Mode (Signal Check) inspection items change from incomplete to complete.
Chassis > Brake > Utility| Tester Display |
|---|
| Signal Check |
OK:
Speed sensor Dealer Mode (Signal Check) inspection items change from incomplete to complete.
| Result | Proceed to |
|---|---|
| OK (for Front) | A |
| OK (for Rear) | B |
| NG | C |
HINT:
The rear speed sensor and rear speed sensor rotor are incorporated into the rear axle hub and bearing assembly.
If the rear speed sensor and rear speed sensor rotor need to be replaced, replace the rear axle hub and bearing assembly.
| A |
 | CLEAN SPEED SENSOR AND SPEED SENSOR ROTOR |
| B |
 | REPLACE REAR AXLE HUB AND BEARING ASSEMBLY |
| C |
 | INSPECT AND REPAIR MALFUNCTIONING SPEED SENSOR CIRCUIT |
Excessive Brake Pedal Travel (No Fluid Leaks and No Air in System)
CAUTION / NOTICE / HINT NOTICE: After replacing the skid control ECU (brake actuator assembly), perform "Calibration". Click here
PROCEDURE 1. PRE-INSPECTION (a) Brake pedal inspection (1) Perform a visual inspection and operate the brake pedal to check for any malfunctions...
VSC does not Operate or VSC does not Operate Correctly
DESCRIPTION When TRC or VSC is operating, the skid control ECU (brake actuator assembly) blinks the slip indicator light to inform the driver that slippage occurred...
Other information:
Toyota Yaris XP210 (2020-2023) Reapir and Service Manual: Terminals Of Ecm
TERMINALS OF ECM ECM HINT: The standard voltage and resistance of each ECM terminal is shown in the table below. The appropriate conditions for checking each pair of terminals are also indicated. The result of checks should be compared with the standard voltage or resistance for that pair of terminals shown in the "Specified Condition" column Use the illustration above as a reference for the ECM terminals...
Toyota Yaris XP210 (2020-2023) Reapir and Service Manual: Components
COMPONENTS ILLUSTRATION *1 INTAKE VALVE GUIDE BUSH *2 EXHAUST VALVE GUIDE BUSH *3 SPARK PLUG TUBE *4 RING PIN *5 STUD BOLT *6 VALVE SPRING RETAINER LOCK *7 NO. 2 STRAIGHT SCREW PLUG *8 NO. 1 STRAIGHT SCREW PLUG *9 INTAKE VALVE SPRING SEAT *10 EXHAUST VALVE SPRING SEAT *11 INTAKE VALVE STEM OIL SEAL *12 EXHAUST VALVE STEM OIL SEAL *13 INTAKE VALVE *14 EXHAUST VALVE *15 INTAKE VALVE COMPRESSION SPRING *16 EXHAUST VALVE COMPRESSION SPRING *17 VALVE SPRING RETAINER - - N*m (kgf*cm, ft...
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Break-In Period
No special break-in is necessary, but a few precautions in the first 600 miles (1,000 km) may add to the performance, economy, and life of the vehicle.
Do not race the engine. Do not maintain one constant speed, either slow or fast, for a long period of time. Do not drive constantly at full-throttle or high engine rpm for extended periods of time. Avoid unnecessary hard stops. Avoid full-throttle starts.