C1252

DTC C1252/52 Brake Booster Pump Motor on Time Abnormally Long

DTC C1253/53 Hydro Booster Pump Motor Relay Malfunction

DESCRIPTION
The skid control ECU detects decreases in the accumulator pressure according to the data from the accumulator pressure sensor, and then starts and stops the pump motor by operating the motor relay. The skid control ECU usually drives the motor (ABS MOTOR1) relay 1 for ECB control, and the motor (ABS MOTOR2) relay 2 for ABS control. If either is of them malfunctioning, the other will substitute.

DTC Detection Condition:

Wiring Diagram:

NOTICE: When replacing the skid control ECU or brake actuator assembly, perform initialization of linear solenoid valve and calibration. Programming and Relearning

INSPECTION PROCEDURE

Step 1:

Steps 1-3:

Steps 4-5:

Steps 6-7:

Step 8:

Steps 9-10:

Step 10 (continued):