Toyota Corolla Cross: Electric Parking Brake does not Operate
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- The electric parking brake may still operate up to 20 seconds after the ignition switch is turned off. Before disconnecting connectors or fuses, turn the ignition switch off and wait 20 seconds or more.
- Inspect the fuses for circuits related to this system before performing the following procedure.
- After replacing the skid control ECU (brake actuator assembly), perform
acceleration sensor zero point calibration and store system information
memorization.
Click here
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- When replacing the skid control ECU (brake actuator assembly), operate the electric parking brake switch assembly as the parking brake indicator light blinks (red) when the ignition switch is first turned ON.
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 | .gif)
|
GO TO CAN COMMUNICATION SYSTEM |
|
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|
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.
Click here
|
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 |
|
GO TO STEP 4 |
|
|
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 |
|---|
|
Park Warning |
(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 ignition switch off.
(b) Disconnect the A151 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 ignition switch off.
(b) Disconnect the A151 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) |
|
|
6. |
CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - ENGINE STOP AND START ECU) |
(a) Turn the ignition switch off.
(b) Disconnect the A151 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the I230 engine stop and start ECU connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A151-36 (IGR) - I230-23 (IG31) |
Always |
Below 1 Ω |
|
A151-36 (IGR) or I230-23 (IG31) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
GO TO STOP AND START SYSTEM |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
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Message Not Displayed on Multi-information Display When AUTO Function Set to
ON/OFF
DESCRIPTION
When the AUTO function is set to ON/OFF, a message is displayed
on the multi-information display in the combination meter assembly.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Brake Warning Light (Yellow) Remains On
DESCRIPTION
This procedure is for troubleshooting when the brake system
warning light (yellow indicator) remains on but no DTCs are output.
The skid control ECU (brake actuator assembly) controls
Electric Parking Brake System AUTO Function Circuit
DESCRIPTION
The skid control ECU (brake actuator assembly) receives shift
position signals from the TCM via CAN communication to control the electric parking
brake system AUTO function (shift-lin
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