C1253

DTC C1253 HYDRO-BOOSTER PUMP MOTOR RELAY MALFUNCTION

CIRCUIT DESCRIPTION

DTC Detection Condition:

The motor relay (semiconductor relay) is built in the master cylinder solenoid and drives the pump motor based on a signal from the skid control ECU.

Wiring Diagram:

Step 1:

Step 2 - 3:

Step 4:

INSPECTION PROCEDURE

NOTE: When replacing the hydraulic brake booster (master cylinder solenoid), perform zero point calibration.

HINT: Start the inspection from step 1 when using the hand-held tester and start from step 2 when not using the hand-held tester.