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Home >> Toyota >> 2021 >> Mirai Limited >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Control System - Diagnostic Codes (09 Of 18) >> Hybrid Control System >> DTC P1C0F-96: AC Inverter Signal Line Component Internal Failure [11/2020 - 12/2022] >> Procedure

DTC P1C0F-96: AC Inverter Signal Line Component Internal Failure [11/2020 - 12/2022]: Procedure

  1. CHECK DTC OUTPUT (EV) 

    Pre-procedure1

    • None.
    • Check for DTCs.

      Powertrain > EV > Trouble Codes 

      Result

      Result Proceed to
      P1C0F-96 only is output, or DTCs except the ones in the table below are also output A
      Any of the DTCs in the table below are output B
      Malfunction Content Relevant DTC
      Microcomputer malfunction P0606-47 Hybrid/EV Powertrain Control Module Processor Watchdog / Safety MCU Failure
      P0606-87 Hybrid/EV Powertrain Control Module Processor to Monitoring Processor Missing Message
      P060A-47 Hybrid/EV Powertrain Control Module Monitoring Processor Watchdog / Safety MCU Failure
      P060A-87 Hybrid/EV Powertrain Control Module Processor from Monitoring Processor Missing Message
      P060B-49 Hybrid/EV Powertrain Control Module A/D Processing Internal Electronic Failure
      P060B-71 Hybrid/EV Powertrain Control Module A/D Processing Actuator Stuck
      P060B-1C Hybrid/EV Powertrain Control Module A/D Processing Voltage Out of Range
      P1CE3-49 Hybrid/EV Powertrain Control Module Monitoring Processor A/D Processing Internal Electronic Failure
      P1CE3-71 Hybrid/EV Powertrain Control Module Monitoring Processor A/D Processing Actuator Stuck
      P1CE3-1C Hybrid/EV Powertrain Control Module Monitoring Processor A/D Processing Voltage Out of Range
      P060A-45 Hybrid/EV Powertrain Control Module Monitoring Processor Program Memory Failure
      P060A-44 Hybrid/EV Powertrain Control Module Monitoring Processor Data Memory Failure
      P060A-29 Hybrid/EV Powertrain Control Module Monitoring Processor Signal Invalid
      P060A-49 Hybrid/EV Powertrain Control Module Monitoring Processor Internal Electronic Failure
      Power source circuit malfunction P0688-1F ECM/PCM Power Relay Sense Circuit Intermittent
      Sensor and actuator circuit malfunction P1CE6-11 AC Inverter Status Signal Circuit Short to Ground
      P1CE6-15 AC Inverter Status Signal Circuit Short to Auxiliary Battery or Open

      HINT: 

      • P1C0F-96 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.)

    Post-procedure1

    • Turn the ignition switch off.

    Result: 

    B 

    GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [11/2020 - 12/2022] 

    Result: 

    A 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (CHECK IND, VAIN VOLTAGE) 
    WARNING:

    Be sure to wear insulated gloves.

    Pre-procedure1

    • Check that the service plug grip and FC converter power outlet cable are not installed.
      NOTE:

      After removing the service plug grip and FC converter power outlet cable, do not turn the ignition switch to ON (READY), unless instructed by the appropriate service information because this may cause a malfunction.

    • Disconnect the J15 voltage inverter connector.

      HINT: 

      Refer to REMOVAL [11/2020 - 12/2022]

      NOTE:

      If the J15 connector is disconnected with the auxiliary battery connected, P1CE6-15 may be detected. Therefore, check that the cable is disconnected from the negative (-) auxiliary battery terminal before starting the operation.

      GTY1004020Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Connect the cable to the negative (-) auxiliary battery terminal.
    • Turn the ignition switch to ON.
    • Measure the voltage according to the value(s) in the table below.
      GTY993383Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Voltage Inverter)

      Standard Voltage

      Tester Connection Condition Specified Condition Result
      J15-2 (IND) - Body ground Ignition switch ON 4.5 to 5.5 V V
      J15-1 (VAIN) - Body ground Ignition switch ON 4.5 to 5.5 V V
      NOTE:

      If the ignition switch is turned to ON with the voltage inverter connector disconnected, other DTCs will be stored. Therefore, clear the DTCs after checking.

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • Turn the ignition switch off.
    • Disconnect the cable from the negative (-) auxiliary battery terminal.
    • Reconnect the J15 voltage inverter connector.

    Result: 

    NG 

    See step  5

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (VOLTAGE INVERTER - EV CONTROL ECU) 
    WARNING:

    Be sure to wear insulated gloves.

    Pre-procedure1

    • Check that the service plug grip and FC converter power outlet cable are not installed.
      NOTE:

      After removing the service plug grip and FC converter power outlet cable, do not turn the ignition switch to ON (READY), unless instructed by the appropriate service information because this may cause a malfunction.

    • Disconnect the J15 voltage inverter connector.

      HINT: 

      Refer to REMOVAL [11/2020 - 12/2022]

      NOTE:

      If the J15 connector is disconnected with the auxiliary battery connected, P1CE6-15 may be detected. Therefore, check that the cable is disconnected from the negative (-) auxiliary battery terminal before starting the operation.

      GTY1004018Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Disconnect the G14 EV control ECU connector.
    • Measure the resistance according to the value(s) in the table below.
      GTY1004115Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Voltage Inverter)
      *b Rear view of wire harness connector
      (to EV Control ECU)

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      J15-6 (SW2) - G14-11 (ACSW) Ignition switch off Below 1 Ω Ω
      J15-6 (SW2) and G14-11 (ACSW) - Body ground and other terminals Ignition switch off 10 kΩ or higher kΩ

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • Reconnect the G14 EV control ECU connector.
    • Reconnect the J15 voltage inverter connector.

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  4

  4. CHECK EV CONTROL ECU 
    WARNING:

    Be sure to wear insulated gloves.

    Pre-procedure1

    • Check that the service plug grip and FC converter power outlet cable are not installed.
      NOTE:

      After removing the service plug grip and FC converter power outlet cable, do not turn the ignition switch to ON (READY), unless instructed by the appropriate service information because this may cause a malfunction.

    • Disconnect the J15 voltage inverter connector.

      HINT: 

      Refer to REMOVAL [11/2020 - 12/2022]

      NOTE:

      If the J15 connector is disconnected with the auxiliary battery connected, P1CE6-15 may be detected. Therefore, check that the cable is disconnected from the negative (-) auxiliary battery terminal before starting the operation.

      GTY1004267Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Connect the cable to the negative (-) auxiliary battery terminal.
    • Turn the ignition switch to ON.
    • Measure the voltage according to the value(s) in the table below.
      GTY993382Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Voltage Inverter)

      Standard Voltage

      Tester Connection Condition Specified Condition Result
      J15-6 (SW2) - Body ground Ignition switch ON Below 1 V V
      NOTE:

      f the ignition switch is turned to ON with the voltage inverter connector disconnected, other DTCs will be stored. Therefore, clear the DTCs after checking.

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • Turn the ignition switch off.
    • Disconnect the cable from the negative (-) auxiliary battery terminal.
    • Reconnect the J15 voltage inverter connector.

    Result: 

    OK 

    REPLACE VOLTAGE INVERTER. Refer to  REMOVAL [11/2020 - 12/2022] 

    Result: 

    NG 

    REPLACE EV CONTROL ECU. Refer to  REMOVAL [11/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 12/2022] 

  5. CHECK HARNESS AND CONNECTOR (VOLTAGE INVERTER - EV CONTROL ECU) 
    WARNING:

    Be sure to wear insulated gloves.

    Pre-procedure1

    • Check that the service plug grip and FC converter power outlet cable are not installed.
      NOTE:

      After removing the service plug grip and FC converter power outlet cable, do not turn the ignition switch to ON (READY), unless instructed by the appropriate service information because this may cause a malfunction.

    • Disconnect the J15 voltage inverter connector.

      HINT: 

      Refer to REMOVAL [11/2020 - 12/2022]

      NOTE:

      If the J15 connector is disconnected with the auxiliary battery connected, P1CE6-15 may be detected. Therefore, check that the cable is disconnected from the negative (-) auxiliary battery terminal before starting the operation.

      GTY1004025Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Disconnect the A8 and A17 EV Control ECU connector.
    • Measure the resistance according to the value(s) in the table below.
      GTY1004248Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Voltage Inverter)
      *b Rear view of wire harness connector
      (to EV Control ECU)

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      J15-2 (IND) - A8-27 (ACIM) Ignition switch off Below 1 Ω Ω
      J15-1 (VAIN) - A17-11 (VAIN) Ignition switch off Below 1 Ω Ω
      J15-2 (IND) and A8-27 (ACIM) - Body ground and other terminals Ignition switch off 10 kΩ or higher kΩ
      J15-1 (VAIN) and A17-11 (VAIN) - Body ground and other terminals Ignition switch off 10 kΩ or higher kΩ

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • Reconnect the A17 and A8 EV Control ECU connector.
    • Reconnect the J15 voltage inverter connector.

    Result: 

    OK 

    REPLACE EV CONTROL ECU. Refer to  REMOVAL [11/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 12/2022] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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