Lexus ES: Left Electric Parking Brake Actuator Control Circuit Short to Battery (C060B12)
DESCRIPTION
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Memory | Note |
|---|---|---|---|---|---|
| C060B12 | Left Electric Parking Brake Actuator Control Circuit Short to Battery |
|
| DTC stored | An electric parking brake system malfunction is displayed on the multi-information display. |
WIRING DIAGRAM
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CAUTION / NOTICE / HINT
NOTICE:
- 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.
-
After replacing the skid control ECU (brake actuator assembly), perform acceleration sensor zero point calibration and store system information memorization.
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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 engine switch is first turned on (IG).
PROCEDURE
| 1. | CHECK FOR SHORT TO +B |
(a) Turn the engine switch off.
(b) Make sure the No. 2 parking brake wire assembly is securely installed.
(c) Disconnect the b3 parking brake actuator assembly LH connector.
| (d) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
| OK |  | REPLACE PARKING BRAKE ACTUATOR ASSEMBLY LH |
|
| 2. | CHECK FOR SHORT TO +B |
(a) Disconnect the bN4 No. 2 parking brake wire assembly connector.
| (b) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
| OK | | REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY |
|
| 3. | CHECK FOR SHORT TO +B |
(a) Disconnect the bN4 No. 2 parking brake wire assembly connector.
(b) Disconnect the A40 skid control ECU (brake actuator assembly) connector.
(c) Measure the voltage according to the value(s) in the table below.
| *a | Front view of wire harness connector | *b | (to Skid Control ECU (Brake Actuator Assembly)) |
| *c | (to No. 2 Parking Brake Wire Assembly) | - | - |
Standard Voltage:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| bN4-2 or A40-13 (MRL+) - Body ground | Always | Below 1 V |
| bN4-1 or A40-12 (MRL-) - Body ground | Always | Below 1 V |
| OK | | REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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