ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:C1259/58, C1310/51

DTC Code DTC Name
C1259/58 HV System Regenerative Malfunction
C1310/51 Malfunction in HV system

DESCRIPTION

The skid control ECU (brake booster with master cylinder assembly) communicates with the hybrid vehicle control ECU assembly and controls braking force according to the motor's regenerative force.

The skid control ECU (brake booster with master cylinder assembly) sends VSC (cooperative control with EPS) signals to the hybrid vehicle control ECU assembly and receives operating signals from the hybrid vehicle control ECU assembly.

The skid control ECU (brake booster with master cylinder assembly) uses CAN communication for communicating with the hybrid vehicle control ECU assembly. If a communication malfunction is detected, the skid control ECU (brake booster with master cylinder assembly) prohibits VSC (cooperative control with EPS) operation and part of the electronically controlled brake system control as a fail-safe function.

If the signals from the hybrid vehicle control ECU assembly returns to normal, the warning light will go off and the DTCs C1259/58 and C1310/51 will be cleared.

DTC No. INF Code DTC Detection Condition Trouble Area
C1259/58 - 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 assembly is valid. Hybrid vehicle control ECU assembly
C1310/51 - 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 assembly is valid. Hybrid vehicle control ECU assembly

Tech Tips

These DTCs will be output from the skid control ECU (brake booster with master cylinder assembly) when the hybrid vehicle control ECU assembly sends a malfunction signal to the skid control ECU (brake booster with master cylinder assembly).

PROCEDURE


  1. CHECK HYBRID CONTROL SYSTEM


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

      Result
      Result Proceed to
      DTCs are not output. A
      DTCs are output. B

    A

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    B

    INSPECT HYBRID CONTROL SYSTEM Click here