Toyota Yaris: Vehicle Stability Control System / ABS Pump Motor Control Circuit Voltage Out of Range (C052C1C)

Toyota Yaris XP210 (2020-2026) Reapir and Service Manual / Brake / Brake Control / Dynamic Control Systems / Vehicle Stability Control System / ABS Pump Motor Control Circuit Voltage Out of Range (C052C1C)

DESCRIPTION

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from
C052C1C	ABS Pump Motor Control Circuit Voltage Out of Range	Any of the following is detected: When the +BS terminal voltage is from 9.5 to 17.4 V with the motor relay and motor fail safe relay OFF, short in ground circuit continues for 2 seconds or more. When the motor relay OFF and the motor fail-safe relay ON, an open or short in motor circuit continues for 4 seconds or more.	Skid control ECU (brake actuator assembly)	Brake

WIRING DIAGRAM

Refer to DTC C052C13.

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CAUTION / NOTICE / HINT

NOTICE:

After replacing the skid control ECU (brake actuator assembly), perform "Calibration".

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PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (GND2 TERMINAL)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

(b) Disconnect the A108 skid control ECU (brake actuator assembly) connector.

OK:

No deformation or corrosion.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
A108-1 (GND2) - Body ground	1 minute or more after disconnecting the cable from the negative (-) auxiliary battery terminal	Below 1 Ω

REPLACE BRAKE ACTUATOR ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

ABS Pump Motor Control Circuit Open (C052C13,C052C49,C052F14)

DESCRIPTION The motor relay and motor fail safe relay are built into the brake actuator assembly. When the skid control ECU (brake actuator assembly) operate ABS, TRC, VSC or brake assist, the motor relay turns ON and drives the motor pump built into the brake actuator assembly...

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DESCRIPTION DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from C054017 Brake Pressure Sensor "A" Circuit Voltage Above Threshold When vehicle speed exceeds 3 km/h (2 mph) and stop light switch assembly is OFF, master cylinder pressure continuously exceeds 1...

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