| Last Modified: 01-30-2024 | 6.11:8.1.0 | Doc ID: RM10000000214QR |
| 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): C140000,C140A00; Brake Pressure Leak Malfunction; 2022 - 2024 MY RAV4 RAV4 HV [12/2021 - ] | ||
|
DTC |
C140000 |
Brake Pressure Leak Malfunction |
|
DTC |
C140A00 |
Pressure Control Reservoir Leak Malfunction |
DESCRIPTION
The No. 2 skid control ECU (brake actuator assembly) controls the brake fluid pressure of each wheel cylinder based on the brake fluid pressure sensor.
DTCs may be stored if one of the following occurs:
- Brake fluid leaks.
- Foreign matter enters a solenoid valve.
- Brake pads are replaced.
-
Rotors are replaced.
HINT:
When replacing the brake pads, retracting the brake caliper pistons and installing new brake pads will greatly increase the clearance between the brake pads and brake discs. This will result in a significant possibility of this DTC being stored the next time the brake pedal is depressed. As this is not a malfunction, clear the DTC if it is stored for this reason.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Note |
|---|---|---|---|---|---|
|
C140000 |
Brake Pressure Leak Malfunction |
Malfunction (leakage, etc.) detected in the ABS decrease pressure valve in the brake actuator assembly. |
|
Does not come on |
Output ECU: No. 2 skid control ECU (brake actuator assembly) |
|
C140A00 |
Pressure Control Reservoir Leak Malfunction |
After the vehicle is driven at a certain speed and the ignition switch is turned off for 90 seconds, a malfunction is detected by the No. 2 skid control ECU (brake actuator assembly) during self-diagnosis. |
|
Does not come on |
Output ECU: No. 2 skid control ECU (brake actuator assembly) |
CAUTION / NOTICE / HINT
NOTICE:
-
After replacing the No. 1 skid control ECU (brake booster with master cylinder assembly), perform "Calibration" after performing "Reset Memory".
Click here
![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)
-
After replacing the No. 2 skid control ECU (brake actuator assembly), perform "Calibration" after performing "Reset Memory".
Click here
PROCEDURE
|
1. |
INSPECT WHEEL CYLINDER PRESSURE |
(a) Mount a pedal effort gauge.
(b) Disconnect the A106 brake booster with accumulator pump assembly connector.
(c) Depress the brake pedal 10 times or more until it becomes hard.
HINT:
Depressing the brake pedal with the connector of the brake booster with accumulator pump assembly disconnected drops the accumulator pressure to approximately 0 MPa.
(d) Connect an LSPV gauge set.
(e) Slowly depress the brake pedal and check the wheel cylinder pressure with respect to brake pedal depression force.
NOTICE:
Check the wheel cylinder pressure with the switching solenoid (SSA, SGH) off and an accumulator pressure of 0 MPa.
Standard Pressure:
for Front Right Wheel
|
Brake Effort [N (kgf, lbf)] |
Hydraulic Pressure [MPa (kgf/cm2, psi)] |
|---|---|
|
200 (20, 45.0) |
0.00 to 2.90 (0.0 to 29.5, 0 to 420) |
|
500 (51, 112.4) |
1.15 to 5.15 (11.8 to 52.5, 167 to 746) |
for Rear Right Wheel
|
Brake Effort [N (kgf, lbf)] |
Hydraulic Pressure [MPa (kgf/cm2, psi)] |
|---|---|
|
200 (20, 45.0) |
0.00 to 2.90 (0.0 to 29.5, 0 to 420) |
|
500 (51, 112.4) |
1.15 to 5.15 (11.8 to 52.5, 167 to 746) |
| NG |
|
|
|
2. |
CLEAR DTC |
(a) Clear the DTCs.
Chassis > Brake/EPB > Clear DTCs
(b) Turn the ignition switch off.
|
|
3. |
RECONFIRM DTC |
(a) Based on the Freeze Frame Data and interview with the customer, attempt to reproduce the conditions when the malfunction occurred.
(b) Check if the same DTC is output.
Chassis > Brake/EPB > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTCs C140000 and C140A00 are not output. |
A |
|
DTCs C140000 and/or C140A00 are output. |
B |
|
DTC C140A00 and C139A00 are output at the same time. |
C |
| A |
|
| B |
|
REPLACE BRAKE ACTUATOR ASSEMBLY
|
| C |
|
REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY AND BRAKE ACTUATOR ASSEMBLY for Brake Booster with Master Cylinder Assembly: Click here
for Brake Actuator Assembly: Click here
|
|
4. |
INSPECT BRAKE FLUID LEAKS |
(a) Brake fluid leaks and air in brake line inspection
(1) Check and take a note of the fluid level in the brake master cylinder reservoir assembly.
(2) Repeatedly depress the brake pedal and confirm that the brake pedal feels normal (no air in the system, etc.).
(3) Check if the brake fluid level in the brake master cylinder reservoir assembly has changed.
(4) If the brake fluid level has decreased, check for leaks due to damaged brake lines or hoses, loose union nuts, damaged brake master cylinder sub-assembly seals, etc.
| OK |
|
REPLACE BRAKE ACTUATOR ASSEMBLY
|
| NG |
|
REPAIR BRAKE FLUID LEAKS AND ADD FLUID |
|
|