Lexus ES manuals

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.

Click here

PROCEDURE

1.

REPLACE BRAKE ACTUATOR ASSEMBLY

(a) Replace the skid control ECU (brake actuator assembly).

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NEXT

END

READ NEXT:

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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

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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

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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

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 Precaution

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 Open in One Side of Bus 3 Branch Line

DESCRIPTION When the CAN bus main lines are normal (no open, short to ground, short to +B or short between lines) and there is an ECU or sensor on the "Communication Bus Check" screen that is indicated as not communicating or whose connection status on the "Communication Bus Check" screen changes in

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