Lexus ES: Left Electric Parking Brake Actuator Signal Stuck In Range (C060E2A)
DESCRIPTION
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Memory | Note |
|---|---|---|---|---|---|
| C060E2A | Left Electric Parking Brake Actuator Signal Stuck In Range |
|
| DTC stored | An electric parking brake system malfunction is displayed on the multi-information display. |
| Vehicle Condition | |||||
|---|---|---|---|---|---|
| Pattern 1 | Pattern 2 | Pattern 3 | Pattern 4 | ||
| Diagnosis Condition | Electric parking brake operating | ○ | ○ | ○ | ○ |
| Malfunction Status | Motor lock detected | ○ | - | - | - |
| Gear lock detected | - | ○ | - | - | |
| Free spinning detected | - | - | ○ | - | |
| Repeated slipping detected | - | - | - | ○ | |
| Detection Time | - | - | - | - | |
| Number of Trips | 1 trip | 1 trip | 1 trip | 1 trip | |
WIRING DIAGRAM
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CAUTION / NOTICE / HINT
NOTICE:
- Although DTC C060E2A may be stored after entering pad replacement mode, this is not a malfunction.
- Although DTC C060E2A may be stored after forcibly releasing the parking brake, this is not a malfunction.
- 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 (red) blinks when the engine switch is first turned on (IG).
PROCEDURE
| 1. | CHECK DTC |
(a) Using the Techstream, check for DTCs other than DTC C060E2A.
Chassis > Brake/EPB > Trouble Codes| Result | Proceed to |
|---|---|
| Only DTC C060E2A is output | A |
| DTCs other than C060E2A are output | B |
| B |  | GO TO DIAGNOSTIC TROUBLE CODE CHART |
|
| 2. | INSPECT NO. 2 PARKING BRAKE WIRE ASSEMBLY |
(a) Turn the engine switch off.
(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.
OK:
The connector is securely connected.
(c) Disconnect the bN4 and b3 No. 2 parking brake wire assembly connectors.
(d) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(e) Measure the resistance according to the value(s) in the table below.
| *a | Front view of No. 2 Parking Brake Wire Assembly | *b | (to wire harness connector) |
| *c | (to Parking Brake Actuator Assembly LH) | - | - |
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| bN4-2 - b3-2 (LE+) | Always | Below 1 Ω |
| bN4-2 or b3-2 (LE+) - Body ground and other terminals | Always | 10 kΩ or higher |
| bN4-1 - b3-1 (LE-) | Always | Below 1 Ω |
| bN4-1 or b3-1 (LE-) - Body ground and other terminals | Always | 10 kΩ or higher |
| NG | | REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY |
|
| 3. | CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) - PARKING BRAKE ACTUATOR ASSEMBLY LH) |
(a) Turn the engine switch off.
(b) Make sure the No. 2 parking brake wire assembly is securely installed.
(c) Disconnect the A40 skid control ECU (brake actuator assembly) connector.
(d) Disconnect the b3 parking brake actuator assembly LH connector.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A40-13 (MRL+) - b3-2 (LE+) | Always | Below 1 Ω |
| A40-12 (MRL-) - b3-1 (LE-) | Always | Below 1 Ω |
| A40-13 (MRL+) or b3-2 (LE+) - Body ground | Always | 10 kΩ or higher |
| A40-12 (MRL-) or b3-1 (LE-) - Body ground | Always | 10 kΩ or higher |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 4. | INSPECT REAR BRAKE AND PARKING BRAKE ACTUATOR ASSEMBLY LH (CHECK FOR ROTATING PARTS THAT ARE STUCK AND FOR FREE SPINNING ACTUATORS) |
(a) Enter rear brake pad replacement mode.
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(b) Turn the engine switch off.
(c) Check that the rotating parts are not seized or the actuator is not spinning freely.
(1) Check that the parking brake actuator assembly LH is installed properly to the rear brake caliper and that it is not spinning freely.
For the parking brake actuator assembly LH removal procedure: Click here
(2) Check that there is no damage to the rotating parts from the parking brake actuator assembly LH to the rear brake caliper.
(3) Inspect the parking brake actuator assembly LH and check that it operates correctly.
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(4) Check that the rear brake caliper threaded part rotates and that the rear disc brake piston moves outward.
HINT:
For the check procedures, refer to the parking brake forced release method when not using the Techstream.
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HINT:
Return to normal mode after work is complete.
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| Result | Proceed to |
|---|---|
| Parking brake actuator assembly LH is malfunctioning | A |
| Other than parking brake actuator assembly LH is malfunctioning | B |
| A | | REPLACE PARKING BRAKE ACTUATOR ASSEMBLY LH |
| B | | REPAIR OR REPLACE ABNORMAL PARTS |
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