C1438

BRAKE CONTROL: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: C1259/58,C1310/14,C1310/51,C1438/59: HV System Regenerative Malfunction


DESCRIPTION

The skid control ECU communicates with the hybrid vehicle control ECU and controls braking force according to the motor's regenerative force.

The skid control ECU sends enhanced VSC signals to the hybrid vehicle control ECU and receives operating signals from the hybrid vehicle control ECU.

The skid control ECU uses CAN communication for communication with the hybrid vehicle control ECU. If a communication malfunction has occurred, the skid control ECU prohibits enhanced VSC operation and a part of the electronically controlled brake system control by the fail-safe function.

DTC C1259/58 is stored if the power switch is turned ON (READY) with the HV battery service plug disconnected.





HINT
These DTCs are output from the skid control ECU when the hybrid vehicle control ECU sends a malfunction signal to the skid control ECU.

INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC FOR HYBRID CONTROL SYSTEM

(a) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.

(b) Check for the hybrid control system DTC Hybrid Control System.

Result





B -- GO TO HYBRID CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) How To Proceed With Troubleshooting

A -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting