Lexus ES: 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 |
| C052C49 | ABS Pump Motor Control Internal Electronic Failure | -
The skid control ECU (brake actuator assembly) detects a malfunction in the pump motor circuit.
-
When the system has started, a short to +B is detected during the ABS motor drive circuit self test.
| Skid control ECU (brake actuator assembly) |
DTC Detection Conditions: C052C49
| | Vehicle Condition |
| Pattern 1 | Pattern 2 |
| Diagnosis Condition | The system has started. | - | ○ |
| Malfunction Status | The skid control ECU (brake actuator assembly) detects a malfunction in the pump motor circuit. | ○ | - |
| A short to +B is detected during the ABS motor drive circuit self test. | - | ○ |
| Detection Time | - | - |
| Number of Trips | 1 trip | 1 trip |
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.
CAUTION / NOTICE / HINT
NOTICE:
After replacing the skid control ECU (brake actuator assembly), perform acceleration sensor zero point calibration and store system information memorization.
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PROCEDURE
| 1. | REPLACE BRAKE ACTUATOR ASSEMBLY |
(a) Replace the skid control ECU (brake actuator assembly).
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DESCRIPTION The ABS motor relay is built into the brake actuator assembly. When the skid control ECU (brake actuator assembly) operates ABS, TRAC, VSC, brake hold, or brake assist, the ABS motor relay
DESCRIPTION If the vehicle information stored by the skid control ECU (brake actuator assembly) does not match that sent from the ECM or a new skid control ECU (brake actuator assembly) is installed a
DESCRIPTION If the vehicle information stored by the skid control ECU (brake actuator assembly) does not match that sent from the ECM or a new skid control ECU (brake actuator assembly) is installed a
SEE MORE:
INSTALLATION PROCEDURE 1. INSTALL HAZARD WARNING SIGNAL SWITCH ASSEMBLY (a) Engage the 2 claws to install the hazard warning signal switch assembly. Install in this Direction 2. INSTALL NO. 2 INSTRUMENT PANEL REGISTER ASSEMBLY Click here 3. INSTALL UPPER INSTRUMENT PANEL FINISH PANEL SUB
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected
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