Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM1000000025DTX |
Model Year Start: 2023 |
Model: Corolla |
Prod Date Range: [09/2022 -
] |
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): C052C49; ABS Pump Motor Control Internal Electronic Failure; 2023 - 2025 MY Corolla Corolla HV [09/2022 - ] |
DTC
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C052C49
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ABS Pump Motor Control Internal Electronic Failure
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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.
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Detection Item
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DTC Detection Condition
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Trouble Area
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MIL
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DTC Output from
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Note
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C052C49
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ABS Pump Motor Control Internal Electronic Failure
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-
The skid control ECU (brake actuator assembly) detects a malfunction in the pump motor circuit.
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When the system has started, a short to +B is detected during the ABS motor drive circuit self-test.
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Skid control ECU (brake actuator assembly)
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Comes on
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Brake/EPB
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-
SAE Code: C052C (Case 1, 2, 4, 5, 7, 8, 9 and 10)
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Output ECU: Skid control ECU (brake actuator assembly)
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MONITOR DESCRIPTION
C052C (Case 1, 2, 4, 5 and 8):
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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.
C052C (Case 7):
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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.
C052C (Case 9):
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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.
C052C (Case 10):
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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
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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
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Required Sensors/Components(Main)
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Skid control ECU (brake actuator assembly)
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Required Sensors/Components(Related)
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Skid control ECU (brake actuator assembly)
Speed sensor
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Frequency of Operation
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During initial checking
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Duration
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-: C052C (Case 1, 2, 4, 5, 7-1, 8 and 9)
0.06 seconds: C052C (Case 7-2)
2 seconds: C052C (Case 10)
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MIL Operation
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Immediately
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Sequence of Operation
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None
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TYPICAL ENABLING CONDITIONS
Monitor runs whenever the following DTCs are not stored
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TMC's intellectual property
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Other conditions belong to TMC's intellectual property
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-
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TYPICAL MALFUNCTION THRESHOLDS
TMC's intellectual property
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-
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COMPONENT OPERATING RANGE
TMC's intellectual property
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-
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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:
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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.
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When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
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Connect the GTS to the DLC3.
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Turn the ignition switch to ON and turn the GTS on.
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Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
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Turn the ignition switch off.
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Turn the ignition switch to ON (READY) and turn the GTS on.
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Depress the brake pedal several times to operate the pump motor of the brake actuator assembly. [*1]
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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.
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Enter the following menus: Chassis / Brake/EPB* / Utility / All Readiness.
*: Electric Parking Brake System
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Check the DTC judgment result.
HINT:
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If the judgment result shows NORMAL, the system is normal.
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If the judgment result shows ABNORMAL, the system has a malfunction.
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If the judgment result shows INCOMPLETE, perform driving pattern again.
PROCEDURE
1.
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REPLACE BRAKE ACTUATOR ASSEMBLY
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Click here
NEXT |
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END
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