Lexus ES manuals

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

  • When the pump motor is turned off after operating, 0.6 V or more is detected at the pump motor for 0.48 seconds or more.
  • The power supply of the ABS motor relay is less than 5 V for 0.15 seconds or more.

Skid control ECU (brake actuator assembly)

DTC Detection Conditions: C052F14
 

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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NEXT

END

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