C1252

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

DESCRIPTION

DTC Detecting 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 Electronically Controlled Brake control, and the motor relay 2 for ABS control.

If either is malfunctioning, the other will substitute.

Wiring Diagram:

Step 1-2:

Step 3-5:

Step 5(Continued)-6:

Step 7-8:

Step 8(Continued)-9:

INSPECTION PROCEDURE

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