Lexus ES: ABS Pump Motor Supply Voltage Circuit Short to Ground or Open (C052F14)
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 turns ON and drives the motor pump built into the brake actuator assembly.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C052F14 | ABS Pump Motor Supply Voltage Circuit Short to Ground or Open |
| Skid control ECU (brake actuator assembly) |
| Vehicle Condition | |||
|---|---|---|---|
| Pattern 1 | Pattern 2 | ||
| Diagnosis Condition | The pump motor is turned off after operating. | ○ | - |
| Malfunction Status | 0.6 V or more is detected at the pump motor. | ○ | - |
| The power supply of the ABS motor relay is less than 5 V. | - | ○ | |
| Detection Time | 0.48 seconds or more. | 0.15 seconds or more. | |
| 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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Components
COMPONENTS ILLUSTRATION *1 NO. 1 OIL NOZZLE SUB-ASSEMBLY *2 NO. 2 OIL NOZZLE SUB-ASSEMBLY *3 CRANKSHAFT *4 CRANKSHAFT THRUST WASHER *5 OIL SEPARATOR GASKET *6 CRANKSHAFT BEARING *7 CRANKSHAFT BEARING CAP SET BOLT *8 CONNECTING ROD BOLT *9 CONNECTING ROD
