Lexus ES: Brake Pressure Control Solenoid "D" Control Circuit Short to Battery (C14FA12,...,C14FA49)
DESCRIPTION
The ABS solenoid relay and reservoir cut solenoid valves are built into the brake actuator assembly.
When the brakes are operating, the reservoir cut solenoid valves supply brake fluid from the brake master cylinder reservoir assembly to the pump motor as necessary.
When this DTC is stored, the fail-safe function operates and the ABS solenoid relay is turned off to prevent the reservoir cut solenoid valves from operating.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C14FA12 | Brake Pressure Control Solenoid "D" Control Circuit Short to Battery | A short to +B in the reservoir cut solenoid circuit is detected during the self test. | Skid control ECU (brake actuator assembly) |
| C14FA14 | Brake Pressure Control Solenoid "D" Control Circuit Short to Ground or Open | An open or short in the reservoir cut solenoid circuit is detected during the self test. | Skid control ECU (brake actuator assembly) |
| C14FA1C | Brake Pressure Control Solenoid "D" Control Circuit Voltage Out of Range |
| Skid control ECU (brake actuator assembly) |
| C14FA1E | Brake Pressure Control Solenoid "D" Control Circuit Resistance Out of Range | An abnormal resistance in the reservoir cut solenoid circuit is detected during the self test. | Skid control ECU (brake actuator assembly) |
| C14FA49 | Brake Pressure Control Solenoid "D" Control Internal Electronic Failure | An internal malfunction in the reservoir cut solenoid circuit is detected during the self test. | Skid control ECU (brake actuator assembly) |
| Vehicle Condition | |||
|---|---|---|---|
| Pattern 1 | Pattern 2 | ||
| Diagnosis Condition | - | - | - |
| Malfunction Status | An open in the reservoir cut solenoid circuit is detected during the self test. | ○ | - |
| A short in the reservoir cut solenoid circuit is detected during the 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.
DTC Detection Conditions: C14FA1C| Vehicle Condition | |||
|---|---|---|---|
| Pattern 1 | Pattern 2 | ||
| Diagnosis Condition | - | - | - |
| Malfunction Status | A current leak in the reservoir cut solenoid circuit is detected during the self test. | ○ | - |
| The reservoir cut solenoid valve operation request signal and reservoir cut solenoid valve operation feedback signal do not match for a certain period of time. | - | ○ | |
| 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 brake actuator assembly.
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Test Mode Procedure
TEST MODE PROCEDURE WARNING LIGHT AND INDICATOR LIGHT INITIAL CHECK (a) When the power switch is turned on (IG), check that the ABS warning, brake warning / red (malfunction), brake warning / yellow (minor malfunction), VSC OFF indicator, slip indicator, brake hold standby indicator and brake hold o
On-vehicle Inspection
ON-VEHICLE INSPECTION CAUTION / NOTICE / HINT CAUTION: To prevent injury due to contact with an operating V-ribbed belt or cooling fan, keep your hands and clothing away from the V-ribbed belt and cooling fan when working in the engine compartment with the engine running or the engine switch on (IG)
