Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: ABS Pump Motor Control Circuit Short to Ground (C052C11,...,C142796)

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

C052C11

ABS Pump Motor Control Circuit Short to Ground

When the voltage at terminal +BM is between 9.6 and 16.4 V, a short to ground in the ABS motor drive circuit is detected during the self test.

Skid control ECU (brake actuator assembly)

C052C13

ABS Pump Motor Control Circuit Open

An open in the ABS motor drive circuit is detected during the self test.

Skid control ECU (brake actuator assembly)

C052F14

ABS Pump Motor Supply Voltage Circuit Short to Ground or Open

The difference between the motor circuit supply power voltage and motor circuit internal voltage is a certain value or more for 0.13 seconds or more.

Skid control ECU (brake actuator assembly)

C052F1B

ABS Pump Motor Supply Voltage Circuit Resistance Above Threshold

During the 2-type motor drive test, the difference between each detected voltage value is a certain value or more 3 times or more.

Skid control ECU (brake actuator assembly)

C111B1C

ABS Pump Motor Position Sensor Circuit Circuit Voltage Out of Range

When the voltage of the rotor position sensor exceeds the operating range.

Skid control ECU (brake actuator assembly)

C111B2B

ABS Pump Motor Position Sensor Circuit Signal Cross Coupled

When the rotor position sensor detects a value outside of the operating range.

Skid control ECU (brake actuator assembly)

C116018

ABS Pump Motor Current Sensor Circuit Circuit Current Below Threshold

When the motor is being driven and the requested motor speed value and measured motor speed value exceed 500 rpm, the motor current is less than a certain value for 0.5 seconds or more.

Skid control ECU (brake actuator assembly)

C11601D

ABS Pump Motor Current Sensor Circuit Circuit Current Out of Range

When the motor is being driven, the current of the ABS motor relay is outside of the range for 0.5 seconds or more.

Skid control ECU (brake actuator assembly)

C116028

ABS Pump Motor Current Sensor Circuit Signal Bias Level Out of Range / Zero Adjustment Failure

When there is no motor drive request, the current value of the ABS motor relay is outside of the range for 0.2 seconds or more.

Skid control ECU (brake actuator assembly)

C116449

ABS Pump Motor Drive Circuit Internal Electronic Failure

An ABS motor relay malfunction is detected.

Skid control ECU (brake actuator assembly)

C116496

ABS Pump Motor Drive Circuit Component Internal Failure

An ABS motor relay internal malfunction is detected.

Skid control ECU (brake actuator assembly)

C11649E

ABS Pump Motor Drive Circuit Stuck On

A low ABS motor relay voltage is detected.

Skid control ECU (brake actuator assembly)

C135E00

ABS Pump Motor Speed Too Low

The motor rotation speed not sufficient with respect to the target motor rotation speed for 0.2 seconds or more.

Skid control ECU (brake actuator assembly)

C142719

ABS Pump Motor Circuit Current Above Threshold

  • When the ABS motor relay is operating, an overload in the ABS motor relay is detected for 0.06 seconds or more.
  • When the ABS motor relay is operating, a short in the pump motor drive circuit is detected for 0.06 seconds or more.

Skid control ECU (brake actuator assembly)

C142762

ABS Pump Motor Signal Compare Failure

During rotor position sensor calibration, the value of the rotor position sensor and target motor angle is outside of the range.

Skid control ECU (brake actuator assembly)

C142771

ABS Pump Motor Actuator Stuck

  • The motor rotation speed not sufficient with respect to the target motor rotation speed for 0.14 seconds or more.
  • The current of the ABS motor relay is less than a certain value.

Skid control ECU (brake actuator assembly)

C142796

ABS Pump Motor Component Internal Failure

During the ABS motor relay self-diagnosis test (energization check) which is performed once every 20 seconds, the current value is outside of the range 3 times or more.

Skid control ECU (brake actuator assembly)

CAUTION / NOTICE / HINT

NOTICE:

  • Before performing troubleshooting, make sure to confirm that the auxiliary battery voltage is normal.

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  • The system may store DTC C052F14 due to a drop in auxiliary battery voltage. If a DTC regarding low system supply power voltage is output at the same time, perform troubleshooting for that DTC first.
  • If the vehicle has stored DTC C052F14 due a drop in auxiliary battery voltage, it can be cleared by driving the vehicle at a speed of 15 km/h (9 mph) or more for 0.48 seconds or more and then clearing the DTCs using the GTS.

PROCEDURE

1.

REPLACE BRAKE ACTUATOR ASSEMBLY

HINT:

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END

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