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ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:C1259, C1310

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DTC Code DTC Name
C1259 HV Control System Regenerative Malfunction
C1310 HV System Malfunction
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DESCRIPTION

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

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

The skid control ECU assembly uses CAN communication for communicating with the hybrid vehicle control ECU assembly. If a communication malfunction is detected, the skid control ECU assembly prohibits enhanced-VSC operation, brake hold 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 return to normal, the warning light will go off and the DTCs C1259 and C1310 will be cleared.

DTC No. Detection Item INF Code DTC Detection Condition Trouble Area Note
C1259 HV Control System Regenerative Malfunction - A 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 the hybrid vehicle control ECU assembly is valid. Hybrid control system (Regeneration malfunction) -
C1310 HV System Malfunction -

  • The hybrid control malfunction signal is received for at least 0.072 seconds from hybrid vehicle control ECU assembly.

  • The hybrid control malfunction signal is received for at least 0.072 seconds from hybrid vehicle control ECU assembly.

    An internal malfunction signal is input for at least 0.072 seconds when IG2 terminal voltage is 9.5 V or more for at least 0.2 seconds and communication with the hybrid vehicle control ECU assembly is valid.

 Hybrid control system -
Table 1. DTC Detection Conditions: C1310
  Vehicle Condition
Pattern 1 Pattern 2
Diagnosis Condition IG2 terminal voltage is 9.5 V or more for at least 0.2 seconds - ○
Malfunction Status A hybrid vehicle control malfunction signal is received from the hybrid vehicle control ECU assembly ○ -
Communication with the hybrid vehicle control ECU assembly is enabled and a traction control prohibition signal is received - ○
Detection Time 0.072 seconds or more 0.072 seconds or more
Number of Trips 1 trip 1 trip
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PROCEDURE


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    CHECK HYBRID CONTROL SYSTEM


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

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      1. Powertrain > Hybrid Control > Trouble Codes


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