DTC C052C-14: ABS Pump Motor Control Circuit Short to Ground or Open; DTC C052C-16: ABS Pump Motor Control Circuit Voltage Below Threshold; DTC C052C-17: ABS Pump Motor Control Circuit Voltage Above Threshold; DTC C052C-29: ABS Pump Motor Control Signal Invalid; DTC C052C-49: ABS Pump Motor Control Internal Electronic Failure; DTC C052F-14: ABS Pump Motor Supply Voltage Circuit Short to Ground or Open [10/2021 - 11/2023]: Description

WARNING: This page is about a different variant/trim than selected.

The motor relay and motor fail-safe relay are built into the brake actuator assembly.

When the No. 2 skid control ECU (brake actuator assembly) operates ABS, TRAC, VSC, or brake assist, etc., the motor relay turns ON and drives the pump motor built into the brake actuator assembly.

If any DTCs related to motor supply power are stored, fail-safe is performed and supply of power to the motor relay is cut by the motor fail-safe relay.

If the voltage supplied to the motor relay (BM terminal) is below the DTC detection threshold due to low voltage from the auxiliary battery or DC/DC converter circuit, these DTCs may be stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Note
C052C-14	ABS Pump Motor Control Circuit Short to Ground or Open	When the voltage at terminal +BS is between 9.5 and 17.4 V and the motor is being driven at full power, an abnormal voltage is detected for 0.12 seconds or more.	Wire harness and connector No. 2 skid control ECU (brake actuator assembly)	Comes on	SAE Code: C052E (Case 6 to 9) Output ECU: No. 2 skid control ECU (brake actuator assembly)
C052C-16	ABS Pump Motor Control Circuit Voltage Below Threshold	When the voltage at terminal +BS is between 9.5 and 17.4 V and the motor is stopped, the detected motor voltage is excessively low for 2 seconds or more.	No. 2 skid control ECU (brake actuator assembly)	Comes on	SAE Code: C052E (Case 1 to 5) Output ECU: No. 2 skid control ECU (brake actuator assembly)
C052C-17	ABS Pump Motor Control Circuit Voltage Above Threshold	When the voltage at terminal +BS is between 9.5 and 17.4 V and the motor is stopped, the detected motor voltage is excessively high for 2 seconds or more.	No. 2 skid control ECU (brake actuator assembly)	Comes on	SAE Code: C052D Output ECU: No. 2 skid control ECU (brake actuator assembly)
C052C-29	ABS Pump Motor Control Signal Invalid	When the voltage at terminal +BS is between 9.5 and 17.4 V and the motor is being driven, the detected motor voltage is excessively high for 0.12 seconds or more.	No. 2 skid control ECU (brake actuator assembly)	Comes on	SAE Code: C052C Output ECU: No. 2 skid control ECU (brake actuator assembly)
C052C-49	ABS Pump Motor Control Internal Electronic Failure	Either of the following is detected: When the voltage at terminal +BS is between 9.5 and 17.4 V, overcurrent is detected in the motor circuit for 0.05 seconds or more. When the voltage at terminal +BS is between 9.5 and 17.4 V, an abnormal voltage is detected in the motor relay gate for 0.12 seconds or more.	Wire harness and connector No. 2 skid control ECU (brake actuator assembly)	Comes on	SAE Code: C052B Output ECU: No. 2 skid control ECU (brake actuator assembly)
C052F-14	ABS Pump Motor Supply Voltage Circuit Short to Ground or Open	When voltage at +BS terminal is 9.5 V or more, open in BM terminal continues for 1 second or more.	Wire harness and connector No. 2 skid control ECU (brake actuator assembly)	Comes on	SAE Code: C055B Output ECU: No. 2 skid control ECU (brake actuator assembly)