Toyota Corolla Cross: ABS Pump Motor Control Internal Electronic Failure (C052C49)
DESCRIPTION
The ABS motor relay and pump motor are built into the brake actuator assembly.
If the skid control ECU (brake actuator assembly) detects a malfunction in the drive circuit of the pump motor, this DTC is stored.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
DTC Output from |
Note |
|---|---|---|---|---|---|---|
|
C052C49 |
ABS Pump Motor Control Internal Electronic Failure |
|
Skid control ECU (brake actuator assembly) |
Comes on |
Brake/EPB |
|
MONITOR DESCRIPTION
C052C (Case 1, 2, 4, 5 and 8):- The ABS motor relay has a self-diagnosis function that monitors the relay and relay drive circuit. When the self-diagnosis function detects a momentary interruption (open), short, or internal malfunction in the relay drive circuit, the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.
- The ABS motor relay has a self-diagnosis function that monitors the relay and relay drive circuit. When the vehicle is being driven at a certain speed and the self-diagnosis function detects a momentary interruption (open), short, or internal malfunction in the relay drive circuit, the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.
- The ABS motor relay has a self-diagnosis function that monitors the relay and relay drive circuit. When the vehicle is being driven at a certain speed and the self-diagnosis function detects the ABS motor relay is not operating correctly, the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.
- When the pump motor is not operating and the voltage applied to the pump motor is more than a certain value, the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.
MONITOR STRATEGY
|
Related DTCs |
C052C (Case 1): Actuation modulator test C052C (Case 2): Active freewheeling path test C052C (Case 4): Inverse motor actuation test and inverse motor relay gate test C052C (Case 5): Load dump test C052C (Case 7): Motor relay source negative voltage test and Motor relay source negative voltage monitoring C052C (Case 8): Analog to digital converter connect test (active & passive) C052C (Case 9): Pump motor test C052C (Case 10): Pump motor feedback voltage monitoring |
|
Required Sensors/Components(Main) |
Skid control ECU (brake actuator assembly) |
|
Required Sensors/Components(Related) |
Skid control ECU (brake actuator assembly) Speed sensor |
|
Frequency of Operation |
During initial checking |
|
Duration |
-: C052C (Case 1, 2, 4, 5, 7-1, 8 and 9) 0.06 seconds: C052C (Case 7-2) 2 seconds: C052C (Case 10) |
|
MIL Operation |
Immediately |
|
Sequence of Operation |
None |
TYPICAL ENABLING CONDITIONS
|
Monitor runs whenever the following DTCs are not stored |
TMC's intellectual property |
|
Other conditions belong to TMC's intellectual property |
- |
TYPICAL MALFUNCTION THRESHOLDS
|
TMC's intellectual property |
- |
COMPONENT OPERATING RANGE
|
TMC's intellectual property |
- |
CONFIRMATION DRIVING PATTERN
NOTICE:
When performing the normal judgment procedure, make sure that the driver door is closed and is not opened at any time during the procedure.
HINT:
- After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
- When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
- Connect the GTS to the DLC3.
- Turn the ignition switch to ON and turn the GTS on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the ignition switch off.
- Turn the ignition switch to ON (READY) and turn the GTS on.
- Depress the brake pedal several times to operate the pump motor of the brake actuator assembly. [*1]
- Drive the vehicle at 40 km/h (25 mph) or more for 1 second. [*2]
HINT:
[*1] to [*2]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- Enter the following menus: Chassis / Brake/EPB* / Utility / All Readiness.
*: Electric Parking Brake System
- Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform driving pattern again.
PROCEDURE
|
1. |
REPLACE BRAKE ACTUATOR ASSEMBLY |
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|
END |
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