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.
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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.
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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 |
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...
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:
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...
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...
Categories
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.
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