| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM1000000026CPI |
| Model Year Start: 2023 | Model: Corolla | Prod Date Range: [09/2022 - ] |
| Title: PARKING BRAKE: ELECTRIC PARKING BRAKE SYSTEM (for HV Model): Electric Parking Brake does not Operate; 2023 - 2025 MY Corolla Corolla HV [09/2022 - ] | ||
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Electric Parking Brake does not Operate |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following procedure.
HINT:
Even if the electric parking brake is operating normally, the parking brake indicator light (red) on the combination meter may be malfunctioning.
PROCEDURE
|
1. |
CHECK CAN COMMUNICATION SYSTEM |
(a) Check if CAN communication system DTCs are output.
Chassis > Brake/EPB > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
DTCs are output |
B |
| B |
|
|
|
2. |
VEHICLE OPERATION CHECK |
(a) With the wheels not contacting the ground, check the condition of the rear wheels when the electric parking brake is operating and not operating.
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![2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - ]; PARKING BRAKE: ELECTRIC PARKING BRAKE ACTUATOR: ON-VEHICLE INSPECTION](/t3Portal/stylegraphics/info.gif)
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Result |
Proceed to |
|---|---|
|
Lock and release operation is normal and parking brake indicator light turns off or blinks (red) |
A |
|
Lock and release operation is malfunctioning and parking brake indicator light illuminates (red) or turns off according to switch operation |
B |
|
Lock and release operation is malfunctioning and parking brake indicator light turns off or blinks (red) |
C |
| B |
|
INSPECT REAR BRAKE |
| C |
|
|
|
3. |
INSPECT COMBINATION METER ASSEMBLY |
(a) Perform the Active Test of the combination meter assembly using the GTS.
Body Electrical > Combination Meter > Active Test
|
Tester Display |
|---|
|
Indicat. Park |
(b) Check the combination meter assembly.
OK:
Parking brake indicator light (red) turns on or off in accordance with GTS operation.
| OK |
|
REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)
|
| NG |
|
GO TO METER / GAUGE SYSTEM
|
|
4. |
CHECK HARNESS AND CONNECTOR (+BS TERMINAL VOLTAGE) |
(a) Turn the power switch off.
(b) Disconnect the A51 skid control ECU (brake actuator assembly) connector.
|
(c) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
5. |
CHECK HARNESS AND CONNECTOR (IGR TERMINAL VOLTAGE) |
(a) Turn the power switch off.
(b) Disconnect the A51 skid control ECU (brake actuator assembly) connector.
|
(c) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
| OK |
|
REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
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