| Last Modified: 01-30-2024 | 6.11:8.1.0 | Doc ID: RM100000001HG9E |
| Model Year Start: 2019 | Model: RAV4 | Prod Date Range: [02/2019 - 12/2021] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): ABS Warning Light Remains ON; 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021] | ||
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ABS Warning Light Remains ON |
DESCRIPTION
The skid control ECU (brake booster with master cylinder assembly) is connected to the combination meter assembly via CAN communication.
If any of the following is detected, the ABS warning light remains on:
- The skid control ECU (brake booster with master cylinder assembly) connector is disconnected from the brake booster with master cylinder assembly.
- There is a malfunction in the skid control ECU (brake booster with master cylinder assembly) internal circuit.
- There is an open in the wire harness between the combination meter assembly and the skid control ECU (brake booster with master cylinder assembly).
- The ABS control system is defective.
HINT:
In some cases, the Techstream cannot be used when the skid control ECU (brake booster with master cylinder assembly) is malfunctioning.
CAUTION / NOTICE / HINT
NOTICE:
When replacing the skid control ECU (brake booster with master cylinder assembly), perform initialization and calibration of the linear solenoid valve.
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![2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): UTILITY](/t3Portal/stylegraphics/info.gif)
PROCEDURE
|
1. |
READ VALUE USING TECHSTREAM (ABS WARNING LIGHT) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Select the Data List on the Techstream.
Click here
Chassis > ABS/VSC/TRAC > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
ABS Warning Light |
ABS warning light |
ON or OFF |
ON: Warning light on OFF: Warning light off |
- |
Chassis > ABS/VSC/TRAC > Data List
|
Tester Display |
|---|
|
ABS Warning Light |
(d) Check the Techstream display condition of the ABS warning light.
|
Result |
Proceed to |
|---|---|
|
Display of the Data List remains OFF. |
A |
|
Display of the Data List remains ON. |
B |
| A |
|
| B |
|
REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY
|
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