BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model with Electric Parking Brake System): C052F14; ABS Pump Motor Supply Voltage Circuit Short to Ground or Open; 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM100000001D2KI
Model Year Start: 2019	Model: GR Corolla	Prod Date Range: [06/2018 - 01/2019]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model with Electric Parking Brake System): C052F14; ABS Pump Motor Supply Voltage Circuit Short to Ground or Open; 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 01/2019]

DTC

C052F14

ABS Pump Motor Supply Voltage Circuit Short to Ground or Open

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.	○	-
Malfunction Status	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.

Click here

PROCEDURE

1.	REPLACE BRAKE ACTUATOR ASSEMBLY

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

Click here

END