| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001G7AK |
| Model Year Start: 2020 | Model: Corolla | Prod Date Range: [01/2019 - 09/2022] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): ABS Operates Before Necessary When Braking; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022] | ||
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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.
PROCEDURE
|
1. |
PERFORM TEST MODE (SIGNAL CHECK) INSPECTION (SPEED SENSOR CIRCUIT) |
(a) Using the Techstream, perform a Test Mode (Signal Check) inspection sensor check and check that speed sensor Test Mode (Signal Check) inspection items change from incomplete to complete.
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![2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): TEST MODE PROCEDURE](/t3Portal/stylegraphics/info.gif)
Chassis > ABS/VSC/TRAC > Utility
|
Tester Display |
|---|
|
Signal Check |
OK:
Speed sensor Test Mode (Signal Check) inspection items change from incomplete to complete.
|
Result |
Proceed to |
|---|---|
|
OK (for Front) |
A |
|
OK (for Rear) |
B |
|
NG |
C |
NOTICE:
- When cleaning the front speed sensor, make sure to clean the installation hole before installation.
- Do not use parts cleaner when cleaning the front speed sensor rotor.
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 FRONT SPEED SENSOR AND FRONT SPEED SENSOR ROTOR |
| B |
|
| C |
|
INSPECT AND REPAIR MALFUNCTIONING SPEED SENSOR CIRCUIT |
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