HYBRID CONTROL SYSTEM, Diagnostic DTC:P0AFC-129

DTC Code DTC Name
P0AFC-129 Hybrid Battery Pack Sensor Module

DTC SUMMARY


  1. MALFUNCTION DESCRIPTION

    The hybrid vehicle control ECU detects a VB sensor malfunction.

    The cause of this malfunction may be one of the following:


      Inside of battery voltage sensor VB sensor circuit malfunction

    • Battery voltage sensor malfunction

    • Communication (wire harness) malfunction


      High voltage system malfunction

    • HV battery malfunction

DESCRIPTION

The battery voltage sensor (battery energy control module) sends HV battery voltage information to the hybrid vehicle control ECU via serial communication.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P0AFC-129 Hybrid Battery Pack Sensor Module

Battery voltage sensor malfunction ("Power Resource VB" output value is abnormal):

When not boosting the difference between "Power Resource VB" and "VL-Voltage before Boosting" is large, and also "Power Resource VB" and "VH-Voltage after Boosting" is large.

(1 trip detection logic)

 Battery voltage sensor Comes on

Master Warning Light:

Comes on
Related Data List
DTC No. Data List
P0AFC-129

  • Power Resource VB

  • VL-Voltage before Boosting

  • VH-Voltage after Boosting

  • Boost Ratio

The following items can be helpful when performing repairs:


CAUTION / NOTICE / HINT

Note

Performing the check procedures for a long time with the shift lever in N may cause DTC P3000-388 to be set.

Tech Tips


  • If it is necessary to replace the battery voltage sensor, voltages need to be confirmed after installing the new battery voltage sensor. Confirm that "Power Resource VB", "VL-Voltage before Boosting", and "VH-Voltage after Boosting" in the Data List are 280 V or more with the power switch on (READY), the shift lever in P, and the engine stopped. When the system is normal, the "Power Resource VB", "VL-Voltage before Boosting", and "VH-Voltage after Boosting" values should be almost equal (voltage boosting will not occur when the shift lever is in N). If the difference between each voltage exceeds the values specified below, there is a malfunction.

    Inspection voltage Maximum voltage difference
    Difference between "Power Resource VB" and "VL-Voltage before Boosting" 34 V
    Difference between "Power Resource VB" and "VH-Voltage after Boosting" 31 V
    Difference between "VL-Voltage before Boosting" and "VH-Voltage after Boosting" 42 V

  • After the repair, if "VL-Voltage before Boosting" and "Power Resource VB" are approximately the same when the power switch is turned on (READY) with the shift lever in P and the accelerator pedal not depressed, the condition is judged as normal.

PROCEDURE


  1. CHECK DTC OUTPUT (HYBRID CONTROL)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

    4. Check for DTCs.


      Powertrain > Hybrid Control > Trouble Codes
      Result
      Result Proceed to
      P0AFC-129 only is output, or DTCs except the ones in the tables below are also output. A
      DTCs shown in Table 1 are output simultaneously. B
      DTCs shown in Table 2 are output simultaneously. C
      Table 1
      Malfunction Content Relevant DTC
      Microcomputer malfunction P0A1A-151, 155, 156, 658, 659 Generator Control Module
      P0A1B-164, 193, 512, 661, 786 Drive Motor "A" Control Module
      P0A1D-148 Hybrid Powertrain Control Module
      P324E-788 MG-ECU Power Relay Intermittent Circuit
      Power source circuit malfunction P2511-149 ECM/PCM Power Relay Sensor Circuit Intermittent
      Communication system malfunction U0110 (all INF codes)*1 Lost Communication with Drive Motor Control Module "A"
      Sensor and actuator circuit malfunction P0A78-266, 267 Drive Motor "A" Inverter Performance
      P0A94-589, 590 DC / DC Converter Performance
      Table 2
      Malfunction Content Relevant DTC
      Microcomputer malfunction P0AFC-123 Hybrid Battery Pack Sensor Module
      Sensor and actuator circuit malfunction P0B3D-123 Hybrid Battery Voltage Sensor "A" Circuit Low
      P0B42-123 Hybrid Battery Voltage Sensor "B" Circuit Low
      P0B47-123 Hybrid Battery Voltage Sensor "C" Circuit Low
      P0B4C-123 Hybrid Battery Voltage Sensor "D" Circuit Low
      P0B51-123 Hybrid Battery Voltage Sensor "E" Circuit Low
      P0B56-123 Hybrid Battery Voltage Sensor "F" Circuit Low
      P0B5B-123 Hybrid Battery Voltage Sensor "G" Circuit Low
      P0B60-123 Hybrid Battery Voltage Sensor "H" Circuit Low
      P0B65-123 Hybrid Battery Voltage Sensor "I" Circuit Low
      P0B6A-123 Hybrid Battery Voltage Sensor "J" Circuit Low
      P0B6F-123 Hybrid Battery Voltage Sensor "K" Circuit Low
      P0B74-123 Hybrid Battery Voltage Sensor "L" Circuit Low
      P0B79-123 Hybrid Battery Voltage Sensor "M" Circuit Low
      P0B7E-123 Hybrid Battery Voltage Sensor "N" Circuit Low
      P0B83-123 Hybrid Battery Voltage Sensor "O" Circuit Low
      P0B88-123 Hybrid Battery Voltage Sensor "P" Circuit Low
      P0B8D-123 Hybrid Battery Voltage Sensor "Q" Circuit Low
      P0B92-123 Hybrid Battery Voltage Sensor "R" Circuit Low
      P308A-123 Hybrid Battery Voltage Sensor All Circuits Low

      Tech Tips


      • *1: If any INF codes are output for this DTC, refer to the corresponding diagnostic procedure.

      • P0AFC-129 may be output as a result of the malfunction indicated by the DTCs above.


        1. The chart above is listed in inspection order of priority.

        2. Check DTCs that are output at the same time by following the listed order. (The main cause of the malfunction can be determined without performing unnecessary inspections.)

    5. Turn the power switch off.


    A

    REPLACE BATTERY VOLTAGE SENSOR Click here

    B

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) Click here

    C

    GO TO DTC CHART (HYBRID BATTERY SYSTEM) Click here