HYBRID CONTROL SYSTEM, Diagnostic DTC:P0A78-504

DTC Code DTC Name
P0A78-504 Drive Motor "A" Inverter Performance

DESCRIPTION

For a description of the inverter.

Click here

If an overvoltage occurs in the motor inverter or generator inverter, the MG ECU detects it and transmits this information to the power management control ECU.

Tech Tips

The term "drive motor A" indicates motor (MG2).

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P0A78-504 Drive Motor "A" Inverter Performance

Motor inverter overvoltage signal detection (overvoltage due to hybrid vehicle transmission assembly malfunction)

Overvoltage is detected after boosting.*

(1 trip detection logic)

  • Inverter with converter assembly

  • Hybrid vehicle transmission assembly

  • Wire harness or connector

 Comes on

Master Warning Light:

Comes on

*: The hybrid vehicle transmission assembly is suspected to be the main cause of the malfunction.

Related Data List
DTC No. Data List
P0A78-504 VH-Voltage after Boosting

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0A1A-200.

Click here

CAUTION / NOTICE / HINT

CAUTION:


  • Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.

  • 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

Tech Tips

After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.


  1. With the vehicle engine stopped, the power switch on (READY) and the shift lever in P, depress the accelerator pedal to start the engine.

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
      P0A78-504 only is output, or DTCs except the ones in the table below are also output. A
      Any of the following DTCs including pending DTCs are also output. B
      Relevant DTC
      P0A1A (all INF codes)*1 Generator Control Module
      P0A1B (all INF codes)*1 Drive Motor "A" Control Module
      P0A1D (all INF codes)*1 Hybrid Powertrain Control Module
      P0A3F-243 Drive Motor "A" Position Sensor Circuit
      P0A40-500 Drive Motor "A" Position Sensor Circuit Range / Performance
      P0A41-245 Drive Motor "A" Position Sensor Circuit Low
      P0A4B-253 Generator Position Sensor Circuit
      P0A4C-513 Generator Position Sensor Circuit Range / Performance
      P0A4D-255 Generator Position Sensor Circuit Low
      P0A60 (all INF codes)*1 Drive Motor "A" Phase V Current
      P0A63 (all INF codes)*1 Drive Motor "A" Phase W Current
      P0A72 (all INF codes)*1 Generator Phase V Current
      P0A75 (all INF codes)*1 Generator Phase W Current
      P0A78-266, 267, 287, 505, 506, 565, 586, 806, 807, 808 Drive Motor "A" Inverter Performance
      P0A7A-325, 517, 518, 809, 810, 811 Generator Inverter Performance
      P0A93-346 Inverter Cooling System Performance
      P0A94-554, 555, 556, 585, 587, 589, 590 DC / DC Converter Performance
      P0ADB-227 Hybrid Battery Positive Contactor Control Circuit Low
      P0ADC-226 Hybrid Battery Positive Contactor Control Circuit High
      P0ADF-229 Hybrid Battery Negative Contactor Control Circuit Low
      P0AE0-228 Hybrid Battery Negative Contactor Control Circuit High
      P0C73-776 Motor Electronics Coolant Pump "A" Control Performance
      P0C76-523 Hybrid Battery System Discharge Time Too Long
      P3004-803 High Voltage Power Resource
      P314A-828 Inverter Coolant Pump Speed Signal

      Tech Tips


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

      • P0A78-504 may be stored due to a malfunction which also causes DTCs in the preceding table to be stored. In this case, first troubleshoot the output DTCs in the preceding table. Then, perform a test to attempt to reproduce the problems, and check that no DTCs are output.

    5. Turn the power switch off.


    B

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) Click here

    A

  2. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR)

    Result
    Result Proceed to
    OK A
    NG (The connector is not connected securely.) B
    NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C

    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. Check connection condition of the low voltage connector of the inverter with converter assembly and the contact pressure of each terminal. Check the terminals for deformation, and check the connector for water ingress and foreign matter.

      Click here

      A0020YPC01
      *A for LHD *B for RHD

      Note

      Before disconnecting the connector, confirm that it is properly connected by checking that the locking claws are engaged and that the connector does not pull out.

      OK
      - The connector is connected securely.
      - The terminals are not deformed and are connected securely.
      - No water or foreign matter in the connector.
      Result
      Result Proceed to
      OK A
      NG (The connector is not connected securely.) B
      NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C

      Tech Tips

      When connecting the connector, insert it with the locking lever in the raised position. Rotate the lever downward and make sure that the connector is pulled into its socket. When the locking lever is in its fully closed position, a click will be heard as its locking claws engage. After the click is heard, pull up on the connector to confirm that it is properly connected.


    B

    CONNECT SECURELY

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

  3. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - GENERATOR RESOLVER)

    Result
    Proceed to
    OK
    NG

    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. Disconnect the A28*1 orA29*2 inverter with converter assembly connector.


      • *1: for LHD

      • *2: for RHD

    3. Connect the cable to the negative (-) auxiliary battery terminal.

    4. Turn the power switch on (IG).

    5. B003XZTC42
      *A for LHD
      *B for RHD
      *a

      Front view of wire harness connector

      (to Inverter with Converter Assembly)

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

      Standard Voltage
      for LHD
      Tester Connection Condition Specified Condition
      A28-20 (GRF) - Body ground Power switch on (IG) Below 1 V
      A28-9 (GRFG) - Body ground Power switch on (IG) Below 1 V
      A28-18 (GSN) - Body ground Power switch on (IG) Below 1 V
      A28-7 (GSNG) - Body ground Power switch on (IG) Below 1 V
      A28-17 (GCS) - Body ground Power switch on (IG) Below 1 V
      A28-6 (GCSG) - Body ground Power switch on (IG) Below 1 V
      for RHD
      Tester Connection Condition Specified Condition
      A29-20 (GRF) - Body ground Power switch on (IG) Below 1 V
      A29-9 (GRFG) - Body ground Power switch on (IG) Below 1 V
      A29-18 (GSN) - Body ground Power switch on (IG) Below 1 V
      A29-7 (GSNG) - Body ground Power switch on (IG) Below 1 V
      A29-17 (GCS) - Body ground Power switch on (IG) Below 1 V
      A29-6 (GCSG) - Body ground Power switch on (IG) Below 1 V

      Note

      Turning the power switch on (IG) with the inverter with converter assembly disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    6. Turn the power switch off.

    7. Disconnect the cable from the negative (-) auxiliary battery terminal.

    8. Reconnect the A28*1 or A29*2 inverter with converter assembly connector.


      • *1: for LHD

      • *2: for RHD

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK GENERATOR RESOLVER

    Result
    Proceed to
    OK
    NG

    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. Disconnect the A28*1 orA29*2 inverter with converter assembly connector.


      • *1: for LHD

      • *2: for RHD

    3. B003XZTC42
      *A for LHD
      *B for RHD
      *a

      Front view of wire harness connector

      (to Inverter with Converter Assembly)

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      A28-20 (GRF) - A28-9 (GRFG) Power switch off 4.2 to 12.5 Ω
      A28-18 (GSN) - A28-7 (GSNG) Power switch off 9.8 to 20.1 Ω
      A28-17 (GCS) - A28-6 (GCSG) Power switch off 9.8 to 20.1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      A29-20 (GRF) - A29-9 (GRFG) Power switch off 4.2 to 12.5 Ω
      A29-18 (GSN) - A29-7 (GSNG) Power switch off 9.8 to 20.1 Ω
      A29-17 (GCS) - A29-6 (GCSG) Power switch off 9.8 to 20.1 Ω

      Tech Tips

      To correct the variation of the measured resistance due to temperature, use the following formula to calculate the resistance at 20°C (68°F).

      R20 = Rt / {1 + 0.00393 X (T - 20)}

      The calculation is based on the following:

      R20: Resistance at 20°C (68°F) (mΩ)

      Rt: Measured resistance (mΩ)

      T: Temperature when the resistance is measured (°C (°F).)

      Standard Resistance (Check for Short)
      for LHD
      Tester Connection Condition Specified Condition
      A28-20 (GRF) or A28-9 (GRFG) - Body ground and other terminals Power switch off 1 MΩ or higher
      A28-18 (GSN) or A28-7 (GSNG) - Body ground and other terminals Power switch off 1 MΩ or higher
      A28-17 (GCS) or A28-6 (GCSG) - Body ground and other terminals Power switch off 1 MΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      A29-20 (GRF) or A29-9 (GRFG) - Body ground and other terminals Power switch off 1 MΩ or higher
      A29-18 (GSN) or A29-7 (GSNG) - Body ground and other terminals Power switch off 1 MΩ or higher
      A29-17 (GCS) or A29-6 (GCSG) - Body ground and other terminals Power switch off 1 MΩ or higher

    4. Reconnect the A28*1 or A29*2 inverter with converter assembly connector.


      • *1: for LHD

      • *2: for RHD

      Result
      Proceed to
      OK
      NG

    NG

    CHECK CONNECTOR CONNECTION CONDITION (GENERATOR RESOLVER CONNECTOR) Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - MOTOR RESOLVER)

    Result
    Proceed to
    OK
    NG

    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. Disconnect the A28*1 orA29*2 inverter with converter assembly connector.


      • *1: for LHD

      • *2: for RHD

    3. Connect the cable to the negative (-) auxiliary battery terminal.

    4. Turn the power switch on (IG).

    5. B003XZTC43
      *A for LHD
      *B for RHD
      *a

      Front view of wire harness connector

      (to Inverter with Converter Assembly)

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

      Standard Voltage
      for LHD
      Tester Connection Condition Specified Condition
      A28-40 (MRF) - Body ground Power switch on (IG) Below 1 V
      A28-29 (MRFG) - Body ground Power switch on (IG) Below 1 V
      A28-39 (MSN) - Body ground Power switch on (IG) Below 1 V
      A28-28 (MSNG) - Body ground Power switch on (IG) Below 1 V
      A28-38 (MCS) - Body ground Power switch on (IG) Below 1 V
      A28-27 (MCSG) - Body ground Power switch on (IG) Below 1 V
      for RHD
      Tester Connection Condition Specified Condition
      A29-40 (MRF) - Body ground Power switch on (IG) Below 1 V
      A29-29 (MRFG) - Body ground Power switch on (IG) Below 1 V
      A29-39 (MSN) - Body ground Power switch on (IG) Below 1 V
      A29-28 (MSNG) - Body ground Power switch on (IG) Below 1 V
      A29-38 (MCS) - Body ground Power switch on (IG) Below 1 V
      A29-27 (MCSG) - Body ground Power switch on (IG) Below 1 V

      Note

      Turning the power switch on (IG) with the inverter with converter assembly disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    6. Turn the power switch off.

    7. Disconnect the cable from the negative (-) auxiliary battery terminal.

    8. Reconnect the A28*1 or A29*2 inverter with converter assembly connector.


      • *1: for LHD

      • *2: for RHD

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK MOTOR RESOLVER

    Result
    Proceed to
    OK
    NG

    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. Disconnect the A28*1 orA29*2 inverter with converter assembly connector.


      • *1: for LHD

      • *2: for RHD

    3. B003XZTC43
      *A for LHD
      *B for RHD
      *a

      Front view of wire harness connector

      (to Inverter with Converter Assembly)

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      A28-40 (MRF) - A28-29 (MRFG) Power switch off 4.2 to 12.5 Ω
      A28-39 (MSN) - A28-28 (MSNG) Power switch off 9.8 to 24.8 Ω
      A28-38 (MCS) - A28-27 (MCSG) Power switch off 9.8 to 24.8 Ω
      for RHD
      Tester Connection Condition Specified Condition
      A29-40 (MRF) - A29-29 (MRFG) Power switch off 4.2 to 12.5 Ω
      A29-39 (MSN) - A29-28 (MSNG) Power switch off 9.8 to 24.8 Ω
      A29-38 (MCS) - A29-27 (MCSG) Power switch off 9.8 to 24.8 Ω

      Tech Tips

      To correct the variation of the measured resistance due to temperature, use the following formula to calculate the resistance at 20°C (68°F).

      R20 = Rt / {1 + 0.00393 X (T - 20)}

      The calculation is based on the following:

      R20: Resistance at 20°C (68°F) (mΩ)

      Rt: Measured resistance (mΩ)

      T: Temperature when the resistance is measured (°C (°F).)

      Standard Resistance (Check for Short)
      for LHD
      Tester Connection Condition Specified Condition
      A28-40 (MRF) or A28-29 (MRFG) - Body ground and other terminals Power switch off 1 MΩ or higher
      A28-39 (MSN) or A28-28 (MSNG) - Body ground and other terminals Power switch off 1 MΩ or higher
      A28-38 (MCS) or A28-27 (MCSG) - Body ground and other terminals Power switch off 1 MΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      A29-40 (MRF) or A29-29 (MRFG) - Body ground and other terminals Power switch off 1 MΩ or higher
      A29-39 (MSN) or A29-28 (MSNG) - Body ground and other terminals Power switch off 1 MΩ or higher
      A29-38 (MCS) or A29-27 (MCSG) - Body ground and other terminals Power switch off 1 MΩ or higher

    4. Reconnect the A28*1 or A29*2 inverter with converter assembly connector.


      • *1: for LHD

      • *2: for RHD

      Result
      Proceed to
      OK
      NG

    NG

    CHECK CONNECTOR CONNECTION CONDITION (MOTOR RESOLVER CONNECTOR) Click here

    OK

  7. CHECK CONNECTOR CONNECTION CONDITION (GENERATOR RESOLVER CONNECTOR)

    Result
    Result Proceed to
    OK A
    NG (The connector is not connected securely.) B
    NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C

    1. Remove the hybrid vehicle transmission assembly.

      Click here

    2. B003Y5I

      Check the connection condition of the generator resolver connector and the contact pressure of each terminal. Check the terminals for deformation, and check the connector for water ingress and foreign matter.

      Click here

      OK
      - The connector is connected securely.
      - The terminals are not deformed and are connected securely.
      - No water or foreign matter in the connector.
      Result
      Result Proceed to
      OK A
      NG (The connector is not connected securely.) B
      NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C

    B

    CONNECT SECURELY

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

  8. CHECK CONNECTOR CONNECTION CONDITION (MOTOR RESOLVER CONNECTOR)

    Result
    Result Proceed to
    OK A
    NG (The connector is not connected securely.) B
    NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C

    1. B003XRT

      Check the connection condition of the motor resolver connector and the contact pressure of each terminal. Check the terminals for deformation, and check the connector for water ingress and foreign matter.

      Click here

      OK
      - The connector is connected securely.
      - The terminals are not deformed and are connected securely.
      - No water or foreign matter in the connector.
      Result
      Result Proceed to
      OK A
      NG (The connector is not connected securely.) B
      NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C

    2. Install the hybrid vehicle transmission assembly.


    A

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

    B

    CONNECT SECURELY

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. CHECK CONNECTOR CONNECTION CONDITION (MOTOR RESOLVER CONNECTOR)

    Result
    Result Proceed to
    OK A
    NG (The connector is not connected securely.) B
    NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C

    1. Remove the hybrid vehicle transmission assembly.

      Click here

    2. B003XRT

      Check the connection condition of the motor resolver connector and the contact pressure of each terminal. Check the terminals for deformation, and check the connector for water ingress and foreign matter.

      Click here

      OK
      - The connector is connected securely.
      - The terminals are not deformed and are connected securely.
      - No water or foreign matter in the connector.
      Result
      Result Proceed to
      OK A
      NG (The connector is not connected securely.) B
      NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C

    B

    CONNECT SECURELY

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

  10. INSPECT HYBRID VEHICLE TRANSMISSION ASSEMBLY (MOTOR RESOLVER)

    Result
    Proceed to
    OK
    NG

    1. B003XRT

      Disconnect the F51 motor resolver connector.

    2. B003YN7C25
      *a

      Component without harness connected

      (Motor Resolver (Hybrid Vehicle Transmission Assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F51-1 (MRF) - F51-5 (MRFG) Power switch off 6.0 to 12.0 Ω
      F51-2 (MSN) - F51-6 (MSNG) Power switch off 12.5 to 24.5 Ω
      F51-3 (MCS) - F51-7 (MCSG) Power switch off 12.5 to 24.5 Ω

      Tech Tips

      To correct the variation of the measured resistance due to temperature, use the following formula to calculate the resistance at 20°C (68°F).

      R20 = Rt / {1 + 0.00393 X (T - 20)}

      The calculation is based on the following:

      R20: Resistance at 20°C (68°F) (mΩ)

      Rt: Measured resistance (mΩ)

      T: Temperature when the resistance is measured (°C (°F).)

      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      F51-1 (MRF) - Body ground and other terminals (except 5 (MRFG)) Power switch off 1 MΩ or higher
      F51-5 (MRFG) - Body ground and other terminals (except 1 (MRF)) Power switch off 1 MΩ or higher
      F51-2 (MSN) - Body ground and other terminals (except 6 (MSNG)) Power switch off 1 MΩ or higher
      F51-6 (MSNG) - Body ground and other terminals (except 2 (MSN)) Power switch off 1 MΩ or higher
      F51-3 (MCS) - Body ground and other terminals (except 7 (MCSG)) Power switch off 1 MΩ or higher
      F51-7 (MCSG) - Body ground and other terminals (except 3 (MCS)) Power switch off 1 MΩ or higher

      Tech Tips

      The motor resolver is not available as a supply part. If it requires replacement, replace the hybrid vehicle transmission assembly.

    3. Reconnect the F51 motor resolver connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    NG

    REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY Click here

  11. CHECK CONNECTOR CONNECTION CONDITION (GENERATOR RESOLVER CONNECTOR)

    Result
    Result Proceed to
    OK A
    NG (The connector is not connected securely.) B
    NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C

    1. Remove the hybrid vehicle transmission assembly.

      Click here

    2. B003Y5I

      Check the connection condition of the generator resolver connector and the contact pressure of each terminal. Check the terminals for deformation, and check the connector for water ingress and foreign matter.

      Click here

      OK
      - The connector is connected securely.
      - The terminals are not deformed and are connected securely.
      - No water or foreign matter in the connector.
      Result
      Result Proceed to
      OK A
      NG (The connector is not connected securely.) B
      NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C

    B

    CONNECT SECURELY

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

  12. INSPECT HYBRID VEHICLE TRANSMISSION ASSEMBLY (GENERATOR RESOLVER)

    Result
    Proceed to
    OK
    NG

    1. B003Y5I

      Disconnect the F50 generator resolver connector.

    2. B003YN7C24
      *a

      Component without harness connected

      (Generator Resolver (Hybrid Vehicle Transmission Assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F50-1 (GRF) - F50-5 (GRFG) Power switch off 5.8 to 11.8 Ω
      F50-2 (GSN) - F50-6 (GSNG) Power switch off 11.7 to 17.7 Ω
      F50-3 (GCS) - F50-7 (GCSG) Power switch off 11.7 to 17.7 Ω

      Tech Tips

      To correct the variation of the measured resistance due to temperature, use the following formula to calculate the resistance at 20°C (68°F).

      R20 = Rt / {1 + 0.00393 X (T - 20)}

      The calculation is based on the following:

      R20: Resistance at 20°C (68°F) (mΩ)

      Rt: Measured resistance (mΩ)

      T: Temperature when the resistance is measured (°C (°F).)

      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      F50-1 (GRF) - Body ground and other terminals (except 5 (GRFG)) Power switch off 1 MΩ or higher
      F50-5 (GRFG) - Body ground and other terminals (except 1 (GRF)) Power switch off 1 MΩ or higher
      F50-2 (GSN) - Body ground and other terminals (except 6 (GSNG)) Power switch off 1 MΩ or higher
      F50-6 (GSNG) - Body ground and other terminals (except 2 (GSN)) Power switch off 1 MΩ or higher
      F50-3 (GCS) - Body ground and other terminals (except 7 (GCSG)) Power switch off 1 MΩ or higher
      F50-7 (GCSG) - Body ground and other terminals (except 3 (GCS)) Power switch off 1 MΩ or higher

      Tech Tips

      The generator resolver is not available as a supply part. If it requires replacement, replace the hybrid vehicle transmission assembly.

    3. Reconnect the F50 generator resolver connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    NG

    REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY Click here