C1253

DTC C1252/52 Brake Booster Pump Motor ON Time Abnormally Long
DTC C1253/53 Hydro Booster Pump Motor Relay Malfunction

DESCRIPTION

DTC DETECTION CONDITION:

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 relay 1 for ECB control, and the motor relay 2 for ABS control. If either is malfunctioning, the will other substitute.

WIRING DIAGRAM:

NOTICE: When replacing the skid control ECU, perform initialization of linear solenoid valve and calibration.

INSPECTION PROCEDURE

Steps 1-2:

Steps 3-5:

Steps 5 (Continued)-6:

Steps 7-8:

Step 9: