BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model with Electric Parking Brake System): C052C11,...,C142796; ABS Pump Motor Control Circuit Short to Ground; 2023 MY Corolla Corolla Hatchback GR Corolla [11/2022

Last Modified: 07-31-2024	6.11:8.1.0	Doc ID: RM1000000028D77
Model Year Start: 2023	Model: GR Corolla	Prod Date Range: [11/2022 - 08/2023]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model with Electric Parking Brake System): C052C11,...,C142796; ABS Pump Motor Control Circuit Short to Ground; 2023 MY Corolla Corolla Hatchback GR Corolla [11/2022 - 08/2023]

DTC

C052C11

ABS Pump Motor Control Circuit Short to Ground

DTC

C052C13

ABS Pump Motor Control Circuit Open

DTC

C052F14

ABS Pump Motor Supply Voltage Circuit Short to Ground or Open

DTC

C052F1B

ABS Pump Motor Supply Voltage Circuit Resistance Above Threshold

DTC

C111B1C

ABS Pump Motor Position Sensor Circuit Circuit Voltage Out of Range

DTC

C111B2B

ABS Pump Motor Position Sensor Circuit Signal Cross Coupled

DTC

C116018

ABS Pump Motor Current Sensor Circuit Circuit Current Below Threshold

DTC

C11601D

ABS Pump Motor Current Sensor Circuit Circuit Current Out of Range

DTC

C116028

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

DTC

C116449

ABS Pump Motor Drive Circuit Internal Electronic Failure

DTC

C116496

ABS Pump Motor Drive Circuit Component Internal Failure

DTC

C11649E

ABS Pump Motor Drive Circuit Stuck On

DTC

C135E00

ABS Pump Motor Speed Too Low

DTC

C142719

ABS Pump Motor Circuit Current Above Threshold

DTC

C142762

ABS Pump Motor Signal Compare Failure

DTC

C142771

ABS Pump Motor Actuator Stuck

DTC

C142796

ABS Pump Motor Component Internal Failure

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 battery voltage is normal.
Click here
The system may store DTC C052F14 due to a drop in battery voltage. If a DTC regarding low system supply power voltage is output at the same time, perform troubleshooting for that DTC first.

PROCEDURE

1.	REPLACE BRAKE ACTUATOR ASSEMBLY

HINT:

Click here

END