Lexus ES manuals

Lexus ES: Brake Pressure Control Solenoid "D" Control Circuit Short to Battery (C14FA12,...,C14FA49)

Lexus ES (XZ10) Service Manual / Brake / Brake Control / Dynamic Control Systems / Electronically Controlled Brake System (for Gasoline Model) / 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

  • 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.

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)

DTC Detection Conditions: C14FA14
 

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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NEXT

END

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 Data List / Active Test

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