Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM100000001CW4K |
Model Year Start: 2019 |
Model: GR Corolla |
Prod Date Range: [06/2018 - 09/2022] |
Title: PARKING BRAKE: ELECTRIC PARKING BRAKE SYSTEM (for Gasoline Model): C060B12; Left Electric Parking Brake Actuator Control Circuit Short to Battery; 2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022] |
DTC
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C060B12
|
Left Electric Parking Brake Actuator Control Circuit Short to Battery
|
DESCRIPTION
DTC No.
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Detection Item
|
DTC Detection Condition
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Trouble Area
|
Memory
|
Note
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C060B12
|
Left Electric Parking Brake Actuator Control Circuit Short to Battery
|
-
Diagnosis Condition:
Electric parking brake not operating
-
Malfunction Status:
The ECU power supply is normal but there is a malfunction in the electric parking brake actuator LH internal circuit (short to +B).
-
Detection Time:
Approximately 0.015 to 0.195 seconds (depending on each malfunction)
|
-
Parking brake actuator assembly LH
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No. 2 parking brake wire assembly
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Wire harness or connector
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Skid control ECU (brake actuator assembly)
|
DTC stored
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An electric parking brake system malfunction is displayed on the multi-information display.
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WIRING DIAGRAM
Click here
CAUTION / NOTICE / HINT
NOTICE:
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The electric parking brake may still operate up to 20 seconds after the engine switch is turned off. Before disconnecting connectors or fuses, turn the engine switch off and wait 20 seconds or more.
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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 (electric parking brake switch assembly) as the parking brake indicator light blinks (red) when the engine switch is first turned on (IG).
PROCEDURE
(a) Turn the engine switch off.
(b) Make sure the No. 2 parking brake wire assembly is securely installed.
(c) Disconnect the n1 parking brake actuator assembly LH connector.
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
|
Condition
|
Specified Condition
|
n1-2 (+) - n1-1 (-)
|
Electric parking brake not operating
|
Below 1 V
|
|
|
*a
|
Front view of No. 2 Parking Brake Wire Assembly
(to Parking Brake Actuator Assembly LH)
|
|
|
NG
|
|
|
(a) Disconnect the nO3 No. 2 parking brake wire assembly connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
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Condition
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Specified Condition
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nO3-1 - nO3-2
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Electric parking brake not operating
|
Below 1 V
|
|
|
*a
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Front view of wire harness connector
(to No. 2 Parking Brake Wire Assembly)
|
|
|
OK |
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REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY
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NG
|
|
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(a) Disconnect the nO3 No. 2 parking brake wire assembly connector.
(b) Disconnect the A51 skid control ECU (brake actuator assembly) connector.
(c) Measure the voltage according to the value(s) in the table below.
*a
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Front view of wire harness connector
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*b
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(to Skid Control ECU (Brake Actuator Assembly))
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*c
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(to No. 2 Parking Brake Wire Assembly)
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-
|
-
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Standard Voltage:
Tester Connection
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Condition
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Specified Condition
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nO3-1 or A51-13 (MRL+) - Body ground
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Always
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Below 1 V
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nO3-2 or A51-12 (MRL-) - Body ground
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Always
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Below 1 V
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NG |
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REPAIR OR REPLACE HARNESS OR CONNECTOR
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|