HYBRID CONTROL SYSTEM, Diagnostic DTC:P1C8149, P1C8249

Info Added 2017-10-06

DTC Code DTC Name
P1C8149 High Voltage Power Resource Circuit Consumption Circuit Short
P1C8249 High Voltage Power Resource Circuit Over Loading

DTC SUMMARY


  1. MALFUNCTION DESCRIPTION

    The hybrid vehicle control ECU monitors the high-voltage wiring between the HV battery and inverter with converter assembly and detects a short circuit malfunction or high-voltage system operation malfunction.

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


      Battery current sensor (IB) circuit malfunction

    • Battery current sensor (IB) malfunction

    • Motor generator control ECU (MG ECU) malfunction

    • Communication (wire harness) malfunction


      High voltage system malfunction

    • HV battery malfunction

    • HV battery junction block assembly malfunction

    • Inverter with converter assembly malfunction

    • Air conditioner system malfunction

    • High-voltage wire harness malfunction

    • High-voltage connector or connection malfunction


      Low-voltage circuit (12 V) malfunction

    • Hybrid vehicle control ECU malfunction

    • Low voltage wire harness malfunction

    • Low voltage connector malfunction

  2. INSPECTION DESCRIPTION

    A005MO5E03
    System Diagram Location Inspection Content Reason Inspection Step
    *a Check high-voltage wiring connection condition of the air conditioner compressor with motor assembly Check for short circuit 2, 4
    *b Check the high voltage cables between the HV battery junction block assembly and inverter with converter assembly. Check for short circuit 3, 5

DESCRIPTION

Refer to the description for DTC P0AE411.

Click here

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P1C8149 High Voltage Power Resource Circuit Consumption Circuit Short

High-voltage circuit malfunctions between the HV battery and inverter with converter assembly.

Excessive overcurrent equal to a short occurs during precharge (time from when SMRP turns on until SMRG turns on).

(1 trip detection logic)

  • Air conditioning wire

  • Compressor with motor assembly

  • Inverter with converter assembly

  • HV battery junction block assembly

  • HV floor under wire

 Does not come on

Master Warning Light:

Comes on
P1C8249 High Voltage Power Resource Circuit Over Loading

High-voltage circuit malfunctions between the HV battery and inverter with converter assembly.

Small battery overcurrent occurs during precharge (time from when SMRP turns on until SMRG turns on) and current continues to flow after precharge.

(1 trip detection logic)

  • Air conditioning wire

  • Compressor with motor assembly

  • Inverter with converter assembly

  • HV battery junction block assembly

  • HV floor under wire

 Does not come on

Master Warning Light:

Comes on
Related Data List
DTC No. Data List
P1C8149

  • Hybrid Battery Voltage

  • Hybrid Battery Current

  • VL-Voltage before Boosting

  • VH-Voltage after Boosting
P1C8249

CONFIRMATION DRIVING PATTERN

Tech Tips

After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

Click here


  1. Connect the GTS to the DLC3.

  2. Turn the power switch on (IG) and turn the GTS on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  4. Turn the power switch off and wait for 2 minutes or more.

  5. Turn the power switch on (READY) and wait for 30 seconds or more.

  6. Turn the power switch off and wait for 30 seconds or more.

  7. Turn the power switch on (IG) and turn the GTS on.

  8. Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.

  9. Check the DTC judgment result.

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, perform driving pattern again.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0AA649.

Click here

CAUTION / NOTICE / HINT

CAUTION:


  • A001PF4

    If this DTC is output, do not turn the power switch on (READY) until the repair has been completed. This DTC means an excessive amperage flow through the system main resistor. The system main resistor may overheat and be damaged if the power switch is turned on (READY) repeatedly before repair.


  • B0048QQ

    Before the following operations are conducted, take precautions to prevent electric shock by turning the power switch off, wearing insulated gloves, and removing the service plug grip from HV battery.


    • Inspecting the high-voltage system

    • Disconnecting the low voltage connector of the inverter with converter assembly

    • Disconnecting the low voltage connector of the HV battery


  • A005NJP

    To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.


  • A005NAH

    After removing the service plug grip from the HV battery, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.


  • B0048M5C01
    *a Without waiting for 10 minutes

    After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.

    Click here

    Tech Tips

    Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

Note

After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

Click here

PROCEDURE


  1. CHECK DTC OUTPUT (HYBRID CONTROL, MOTOR GENERATOR)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

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

    4. Check for DTCs.


      Powertrain > Hybrid Control > Trouble Codes
      Powertrain > Motor Generator > Trouble Codes
      Result
      Result Proceed to
      P1C8149 or P1C8249 only is output, or DTCs except the ones in the tables below are also output. A
      DTCs of hybrid control system in the tables below are output. B
      DTCs of motor generator control system in the tables below are output. C
      Malfunction Content System Relevant DTC
      Microcomputer malfunction Hybrid control system P060647 Hybrid/EV Powertrain Control Module Processor Watchdog / Safety MCU Failure
      P0AFC96 Hybrid/EV Battery Sensor Module Component Internal Failure
      P0AFC00 Hybrid/EV Battery Sensor Module
      Power source circuit malfunction Hybrid control system P0AFC16 Hybrid/EV Battery Sensor Module Circuit Voltage Below Threshold
      Communication system malfunction Hybrid control system U029A87 Lost Communication with Hybrid/EV Battery Sensor Module Missing Message
      Sensor and actuator circuit malfunction Hybrid control system P0ABF11 Hybrid/EV Battery Current Sensor "A" Circuit Short to Ground
      P0ABF15 Hybrid/EV Battery Current Sensor "A" Circuit Short to Auxiliary Battery or Open
      P0B3B14 Hybrid/EV Battery Voltage Sensor "A" Circuit Short to Ground or Open
      P0B4014 Hybrid/EV Battery Voltage Sensor "B" Circuit Short to Ground or Open
      P0B4514 Hybrid/EV Battery Voltage Sensor "C" Circuit Short to Ground or Open
      P0B4A14 Hybrid/EV Battery Voltage Sensor "D" Circuit Short to Ground or Open
      P0B4F14 Hybrid/EV Battery Voltage Sensor "E" Circuit Short to Ground or Open
      P0B5414 Hybrid/EV Battery Voltage Sensor "F" Circuit Short to Ground or Open
      P0B5914 Hybrid/EV Battery Voltage Sensor "G" Circuit Short to Ground or Open
      P0B5E14 Hybrid/EV Battery Voltage Sensor "H" Circuit Short to Ground or Open
      P0B6314 Hybrid/EV Battery Voltage Sensor "I" Circuit Short to Ground or Open
      P0B6814 Hybrid/EV Battery Voltage Sensor "J" Circuit Short to Ground or Open
      P308A13 Hybrid/EV Battery Voltage Sensor All Circuit Open
      P0AFC62 Hybrid/EV Battery Sensor Module Signal Compare Failure
      P0B231C Hybrid/EV Battery "A" Voltage Sensor Voltage Out of Range
      P308A12 Hybrid/EV Battery Voltage Sensor All Circuit Short to Auxiliary Battery
      P0ABF00 Hybrid/EV Battery Current Sensor "A" Circuit Range/Performance
      P0ABF28 Hybrid/EV Battery Current Sensor "A" Signal Bias Level Out of Range / Zero Adjustment Failure
      P0ABF2A Hybrid/EV Battery Current Sensor "A" Signal Stuck In Range
      Motor generator control system P0A1114 DC/DC Converter Enable Circuit Short to Ground or Open
      P0A1112 DC/DC Converter Enable Circuit Short to Battery
      P1CCC96 DC/DC Converter Enable Component Internal Failure
      System malfunction Motor generator control system P0D3319 DC/DC Converter Circuit Current Above Threshold

      Tech Tips


      • P1C8149 or P1C8249 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.


    B

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) Click here

    C

    GO TO DTC CHART (MOTOR GENERATOR CONTROL SYSTEM) Click here

    A

  2. CHECK COMPRESSOR WITH MOTOR ASSEMBLY

    CAUTION:

    Be sure to wear insulated gloves.


    1. Check that the service plug grip is not installed.

      Note

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. A001PIR

      Disconnect the air conditioning wire connector from the inverter with converter assembly.

    3. A005NHBC06
      *a

      Air conditioning wire

      (Inverter with Converter Assembly Side)
      *b Tip of Terminal

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection

      (Tester Probe Polarity)

      		 Condition Specified Condition
      U2-2 (ACPE) (Negative (-) probe) - U2-1 (ACPB) (Positive (+) probe) Power switch off 100 kΩ or higher

      Note


      • Do not use a megohmmeter.

      • Read the resistance after the value has stabilized.

      • Be sure to inspect with connecting the tester probes to the tips of the terminal.

    4. Reconnect the air conditioning wire connector.

      Result
      Proceed to
      OK
      NG

    NG

    CHECK AIR CONDITIONING WIRE Click here

    OK

  3. CHECK HV FLOOR UNDER WIRE

    CAUTION:

    Be sure to wear insulated gloves.


    1. Check that the service plug grip is not installed.

      Note

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. A005MYY

      Disconnect the HV floor under wire connector from the inverter with converter assembly.

    3. A005MPXC08
      *a

      HV Floor Under Wire

      (Inverter with Converter Assembly Side)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      T1-1 (CBI) - T1-2 (CEI) Power switch off 10 kΩ or higher

      Note

      Be sure not to damage or deform the terminal being inspected.

    4. Reconnect the HV floor under wire connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

    NG

    CHECK HV FLOOR UNDER WIRE Click here

  4. CHECK AIR CONDITIONING WIRE

    CAUTION:

    Be sure to wear insulated gloves.


    1. Check that the service plug grip is not installed.

      Note

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. A001PIR

      Disconnect the air conditioning wire connector from the inverter with converter assembly.

    3. A001RTY

      Disconnect the U1 air conditioning wire from the compressor with motor assembly.

      Click here

    4. A005NHBC06
      *a

      Air conditioning wire

      (Inverter with Converter Assembly Side)
      *b Tip of Terminal

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      U2-2 (ACPE) - U2-1 (ACPB) Power switch off 10 kΩ or higher

      Note

      Be sure to inspect with connecting the tester probes to the tips of the terminal.

    5. Reconnect the air conditioning wire connector to the inverter with converter assembly.

    6. Reconnect the U1 air conditioning wire to the compressor with motor assembly.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE COMPRESSOR WITH MOTOR ASSEMBLY Click here

    NG

    REPLACE AIR CONDITIONING WIRE

  5. CHECK HV FLOOR UNDER WIRE

    CAUTION:

    Be sure to wear insulated gloves.


    1. Check that the service plug grip is not installed.

      Note

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. Remove the No. 1 HV battery cover panel RH.

      Click here

    3. A005NBL

      Disconnect the HV floor under wire connectors from the HV battery junction block assembly.

    4. A005MYY

      Disconnect the HV floor under wire connector from the inverter with converter assembly.

    5. A005MPXC08
      *a

      HV Floor Under Wire

      (Inverter with Converter Assembly Side)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      T1-1 (CBI) - T1-2 (CEI) Power switch off 10 kΩ or higher

      Note

      Be sure not to damage or deform the terminal being inspected.

    6. Reconnect the HV floor under wire connector to the inverter with converter assembly.

    7. Reconnect the HV floor under wire connectors to the HV battery junction block assembly.

    8. Install the No. 1 HV battery cover panel RH.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY Click here

    NG

    REPLACE HV FLOOR UNDER WIRE Click here