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Home >> Honda >> 2021 >> Insight EX >> Repair and Diagnosis >> Electrical >> Charging Systems >> Battery Management System - Diagnostics (1 Of 2) >> DTC Troubleshooting >> DTC P0A9E (50), P0AC8 (52), P0ACD (54), P0AEB (120), P0BC5 (161)

DTC P0A9E (50), P0AC8 (52), P0ACD (54), P0AEB (120), P0BC5 (161)

DTC P0A9E  : HV Battery Temperature Sensor 1 Circuit High
DTC P0AC8  : HV Battery Temperature Sensor 2 Circuit High
DTC P0ACD  : HV Battery Temperature Sensor 3 Circuit High
DTC P0AEB  : HV Battery Temperature Sensor 4 Circuit High
DTC P0BC5  : HV Battery Temperature Sensor 5 Circuit High

NOTE:  Before you troubleshoot, review the How to Troubleshoot the Electric Powertrain and Electric Powertrain Service Precaution .

DTC Description Confirmed DTC Pending DTC Freeze Frame
P0A9E HV Battery Temperature Sensor 1 Circuit High      
P0AC8 HV Battery Temperature Sensor 2 Circuit High      
P0ACD HV Battery Temperature Sensor 3 Circuit High      
P0AEB HV Battery Temperature Sensor 4 Circuit High      
P0BC5 HV Battery Temperature Sensor 5 Circuit High      

DTC (Electric Powertrain)

  1. Problem verification

    -1. Turn the vehicle to the ON mode.

    -2. Clear the DTC with the HDS.

    -3. Check the parameter (s) of the corresponding DTC below with the HDS.

    Signal Threshold Current conditions
    Values Unit Values Unit
    HV Battery Module Temperature Sensor1 Voltage More than 4.93 V    
    HV Battery Module Temperature Sensor2 Voltage More than 4.93 V    
    HV Battery Module Temperature Sensor3 Voltage More than 4.93 V    
    HV Battery Module Temperature Sensor4 Voltage More than 4.93 V    
    HV Battery Module Temperature Sensor5 Voltage More than 4.93 V    

    Do the current condition (s) match the threshold?

    YES 

    The failure is duplicated. Go to step 2.

    NO 

    Intermittent failure, the system is OK at this time. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.

  2. Determine possible failure area (TBATT line, SGTB line)

    -1. Check for Pending or Confirmed DTCs with the HDS.

    DTC Description Confirmed DTC Pending DTC Freeze Frame
    P0A9E HV Battery Temperature Sensor 1 Circuit High      
    P0AC8 HV Battery Temperature Sensor 2 Circuit High      
    P0ACD HV Battery Temperature Sensor 3 Circuit High      
    P0AEB HV Battery Temperature Sensor 4 Circuit High      
    P0BC5 HV Battery Temperature Sensor 5 Circuit High      

    Are DTC P0A9E, P0AC8, P0ACD, P0AEB, and P0BC5 indicated at the same time?

    YES 

    Go to step 4.

    NO 

    Go to step 3.

  3. Open wire check (TBATT line)

    -1. Turn the vehicle to the OFF (LOCK) mode.

    -2. Remove the service plug .

    -3. Remove the IPU cover .

    -4. Remove the IPU .

    -5. Remove the IPU case .

    -6. Disconnect the following connectors.

    Battery condition monitor module connector F (12P)
    DTC P0A9E, P0AC8, P0ACD: High voltage battery module temperature sensor connector A (6P)
    DTC P0AEB, P0BC5: High voltage battery module temperature sensor connector B (4P)
    GHH382923Courtesy of HONDA, U.S.A., INC.
    GHH382924Courtesy of HONDA, U.S.A., INC.

    -7. Check for continuity between appropriate DTC's test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
      DTC P0A9E, P0AC8, P0ACD: High voltage battery module temperature sensor connector A (6P) : disconnected
      DTC P0AEB, P0BC5: High voltage battery module temperature sensor connector B (4P)
      Battery condition monitor module connector F (12P): disconnected
    DTC Test point 1 Test point 2
    P0A9E (TBATT1) Battery condition monitor module connector F (12P) No. 1 High voltage battery module temperature sensor connector A (6P) (female terminals) No. 1:
    P0AC8 (TBATT2) Battery condition monitor module connector F (12P) No. 7 High voltage battery module temperature sensor connector A (6P) (female terminals) No. 3:
    P0ACD (TBATT3) Battery condition monitor module connector F (12P) No. 2 High voltage battery module temperature sensor connector A (6P) (female terminals) No. 1:
    P0AEB (TBATT4) Battery condition monitor module connector F (12P) No. 8 High voltage battery module temperature sensor connector B (4P) (male terminals) No. 4:
    P0BC5 (TBATT5) Battery condition monitor module connector F (12P) No. 3 High voltage battery module temperature sensor connector B (4P) (male terminals) No. 2:
    GHH382930Courtesy of HONDA, U.S.A., INC.
    GHH382931Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    Go to step 5.

    NO 

    Repair an open in the TBATT wire between the battery condition monitor module and the high voltage battery module temperature sensor.

  4. Open wire check (SGTB line)

    -1. Turn the vehicle to the OFF (LOCK) mode.

    -2. Remove the service plug .

    -3. Remove the IPU cover .

    -4. Remove the IPU .

    -5. Remove the IPU case .

    -6. Disconnect the following connectors.

    Battery condition monitor module connector F (12P)
    DTC P0A9E, P0AC8, P0ACD: High voltage battery module temperature sensor connector A (6P)
    DTC P0AEB, P0BC5: High voltage battery module temperature sensor connector B (4P)
    GHH382932Courtesy of HONDA, U.S.A., INC.
    GHH382933Courtesy of HONDA, U.S.A., INC.

    -7. Check for continuity between appropriate DTC's test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
      DTC P0A9E, P0AC8, P0ACD: High voltage battery module temperature sensor connector A (6P): disconnected
      DTC P0AEB, P0BC5: High voltage battery module temperature sensor connector B (4P): disconnected
      Battery condition monitor module connector F (12P): disconnected
    DTC Test point 1 Test point 2
    P0A9E Battery condition monitor module connector F (12P) No. 6 High voltage battery module temperature sensor connector A (6P) (female terminals) No. 2:
    P0AC8 High voltage battery module temperature sensor connector A (6P) (female terminals) No. 4:
    P0ACD High voltage battery module temperature sensor connector A (6P) (female terminals) No. 6:
    P0AEB High voltage battery module temperature sensor connector B (4P) (male terminals) No. 3:
    P0BC5 High voltage battery module temperature sensor connector B (4P) (male terminals) No. 1:
    GHH382939Courtesy of HONDA, U.S.A., INC.
    GHH382940Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    Go to step 5.

    NO 

    Repair an open in SGTB wire between the battery condition monitor module and the high voltage battery module temperature sensor.

  5. High voltage battery module temperature sensor check

    -1. At the sensor side, measure the resistance between appropriate DTC's test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
      DTC P0A9E, P0AC8, P0ACD: High voltage battery module temperature sensor connector A (6P): disconnected
      DTC P0AEB, P0BC5: High voltage battery module temperature sensor connector B (4P): disconnected
      Battery condition monitor module connector F (12P): disconnected
    DTC High voltage battery module temperature sensor connector Test point 1 Test point 2
    P0A9E A (6P) (male terminals) No. 1: No. 2:
    P0AC8 A (6P) (male terminals) No. 3: No. 4:
    P0ACD A (6P) (male terminals) No. 5: No. 6:
    P0AEB B (4P) (female terminals) No. 3: No. 4:
    P0BC5 B (4P) (female terminals) No. 1: No. 2:
    GHH382951Courtesy of HONDA, U.S.A., INC.
    GHH382952Courtesy of HONDA, U.S.A., INC.
    GHH382953Courtesy of HONDA, U.S.A., INC.

    Is resistance value within the range?

    YES 

    The high voltage battery module temperature sensor is OK. Replace the battery condition monitor module .

    NO 

    Failure in the following high voltage battery module temperature sensor. Replace the battery pack .

    • DTC P0A9E: High voltage battery module temperature sensor 1
    • DTC P0AC8: High voltage battery module temperature sensor 2
    • DTC P0ACD: High voltage battery module temperature sensor 3
    • DTC P0AEB: High voltage battery module temperature sensor 4
    • DTC P0BC5: High voltage battery module temperature sensor 5
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