C1378

DTC C1378/44 Capacitor Communication Malfunction

DESCRIPTION

DTC DETECTION CONDITION:

The brake control power supply assembly (capacitor) provides auxiliary power for brake control when an auxiliary battery (12 V) voltage drops. The FAIL and ENA lines are placed between the skid control ECU and the brake control power supply assembly Signals indicating that the brake control power supply is in auxiliary mode are sent to the skid control ECU through the FAIL line. Charge permit prohibition signals are sent to the brake control power supply through the ENA line.

WIRING DIAGRAM:

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

INSPECTION PROCEDURE

Steps 1-3:

Step 3 (Continued):