ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:C1259, C1310

DTC Code DTC Name
C1259 HV Control System Regenerative Malfunction
C1310 HV System 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 VSC (cooperative control with EPS) 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 is memorized, the skid control ECU prohibits VSC (cooperative control with EPS) operation and a part of electronically controlled brake system control by fail-safe function.

If the signals from the hybrid vehicle control ECU returned to normal, the warning light will go off and the DTCs C1259 and C1310 will be cleared.

DTC Code INF Code DTC Detection Condition Trouble Area
C1259 - The regeneration malfunction signal is input for at least 0.036 seconds when IG2 terminal voltage is 9.5 V or more for at least 2 seconds and communication with hybrid vehicle control ECU is valid. Hybrid vehicle control ECU
C1310 - The internal malfunction signal is input for at least 0.072 seconds when IG2 terminal voltage is 10.5 V or more for at least 2 seconds and communication with hybrid vehicle control ECU is valid. Hybrid vehicle control ECU

Tech Tips

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

PROCEDURE


  1. CHECK HYBRID CONTROL SYSTEM


    1. Check if the hybrid control system DTC is output Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

    A

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    B

    INSPECT HYBRID CONTROL SYSTEM Click here