| Last Modified: 01-30-2024 | 6.11:8.1.0 | Doc ID: RM10000000214RQ |
| Model Year Start: 2022 | Model: RAV4 | Prod Date Range: [12/2021 - ] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): Abnormal Brake Pedal Response on First Depression; 2022 - 2024 MY RAV4 RAV4 HV [12/2021 - ] | ||
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Abnormal Brake Pedal Response on First Depression |
DESCRIPTION
If the vehicle has been stopped without opening or closing the driver door for a long period of time, the electronically controlled brake system will not be ready and sufficient fluid pressure may not be stored in the accumulator. In this case, the brake pedal response may not be the same as usual the first time the brake pedal is depressed. This is not a malfunction.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
After replacing the No. 1 skid control ECU (brake booster with master cylinder assembly), perform "Calibration" after performing "Reset Memory".
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![2022 - 2024 MY RAV4 RAV4 HV [12/2021 - ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): UTILITY](/t3Portal/stylegraphics/info.gif)
PROCEDURE
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1. |
BRAKE PROBLEM CHECK |
(a) Check the conditions at the time the problem occurred.
(1) Whether a warning light illuminated or the buzzer sounded.
(2) The number of times the ignition switch was turned to ON since the latest symptom occurred.
(3) Frequency of the symptom.
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2. |
CHECK DTC |
(a) Check the DTCs (electronically controlled brake system) that are output.
Chassis > Brake Booster > Trouble Codes
|
Result |
Proceed to |
|---|---|
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DTCs C125600, C125609 and C139100 are not output. |
A |
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DTCs C125600, C125609 and/or C139100 are output. |
B |
| B |
|
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS |
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3. |
CHECK VEHICLE |
(a) Turn the ignition switch off.
(b) Depress the brake pedal within 4 minutes of opening the driver door and check the response of the brake pedal.
(c) Release the brake pedal and wait for 4 minutes without depressing the brake pedal, opening or closing the driver door or operating the ignition switch.
(d) After 4 minutes or more have elapsed, depress the brake pedal and check that the first depression response is different to successive depression responses.
HINT:
Compare the response of the brake pedal when the system is in sleep mode and when the stroke simulator is operating.
|
Result |
Proceed to |
|---|---|
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The response of the brake pedal does not change. |
A |
|
The response of the brake pedal changed. |
B |
| B |
|
END |
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|
4. |
INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (FOR DRIVER SIDE) |
(a) Set the interior light door switch to ON and check that the map light assembly illuminates, then set the interior light door switch to DOOR.
(b) Check that the map light assembly illuminates when the driver door is opened.
OK:
The map light assembly illuminates when the driver door is opened.
| NG |
|
|
|
5. |
CHECK HARNESS AND CONNECTOR (CTY TERMINAL) |
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(a) Make sure that there is no looseness at the locking part and the connecting part of the connector. OK: The connector is securely connected. |
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(b) Disconnect the A104 No. 1 skid control ECU (brake booster with master cylinder assembly) connector.
(c) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A104-40 (CTY) - Body ground |
Driver door open |
Below 1.5 V |
|
A104-40 (CTY) - Body ground |
Driver door closed |
11 to 14 V |
| OK |
|
REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY
|
| NG |
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REPAIR OR REPLACE HARNESS OR CONNECTOR |
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