HYBRID CONTROL SYSTEM, Diagnostic DTC:P0AA6-526, P0AA6-611, P0AA6-612, P0AA6-613, P0AA6-614

DTC Code DTC Name
P0AA6-526 Hybrid Battery Voltage System Isolation Fault
P0AA6-611 Hybrid Battery Voltage System Isolation Fault
P0AA6-612 Hybrid Battery Voltage System Isolation Fault
P0AA6-613 Hybrid Battery Voltage System Isolation Fault
P0AA6-614 Hybrid Battery Voltage System Isolation Fault

DESCRIPTION

The power management control ECU monitors the battery voltage sensor and detects insulation malfunctions in the high-voltage system.

DTC No. DTC Detection Condition Trouble Area
P0AA6-526

Insulation resistance between the high-voltage circuit and the body has decreased.*1

(1 trip detection logic)

  • Hybrid vehicle transmission assembly

  • Generator cable

  • Motor cable

  • Inverter with converter assembly

  • No. 4 floor wire

  • No. 4 floor wire (air conditioning harness) (for LHD)

  • Air conditioning harness (for RHD)

  • Hybrid battery junction block assembly

  • Air conditioning system

  • HV battery

  • Battery voltage sensor
P0AA6-611

Insulation resistance of the compressor with motor assembly or air conditioning inverter has decreased.*2

(1 trip detection logic)

 Air conditioning system
P0AA6-612

Insulation resistance of the HV battery, battery voltage sensor, SMR or SMRG has decreased.*2

(1 trip detection logic)

  • Hybrid vehicle transmission assembly

  • Battery voltage sensor

  • HV battery
P0AA6-613

Insulation resistance of the hybrid vehicle transmission assembly or inverter for generator (MG1) and motor (MG2) has decreased.*2

(1 trip detection logic)

  • Hybrid vehicle transmission assembly

  • Generator cable

  • Motor cable

  • Inverter with converter assembly
P0AA6-614

Insulation resistance of the inverter for generator (MG1) and motor (MG2), A/C inverter, SMR, SMRG or frame wire has decreased.*2

(1 trip detection logic)

  • Inverter with converter assembly

  • No. 4 floor wire

  • Air conditioning system

  • No. 4 floor wire (air conditioning harness) (for LHD)

  • Air conditioning harness (for RHD)

  • Hybrid battery junction block assembly

Tech Tips


  • *1: The insulation malfunction detection circuit in the battery voltage sensor monitors the insulation resistance between the high voltage circuits and body. If the insulation resistance decreases, the power management control ECU stores DTC P0AA6-526 and illuminates the MIL first.

  • *2: If the following operations are performed within the same trip after DTC P0AA6-526 is stored, just one of the related DTCs (P0AA6-611, 612, 613 or 614) will be stored.


    1. Apply the parking brake firmly.

    2. Wait for 1 minute or more with the vehicle stopped, the brake pedal firmly depressed, the power switch on (READY), the shift lever in D and the air conditioning system on (Lo/COOL MAX, blower speed HI), then turn the power switch off and wait for 1 minute or more.

  • When measuring insulation resistance using a megohmmeter, measure the resistance while jiggling the high voltage wire harness.

WIRING DIAGRAM

B002BKHE02
Text in Illustration
*1 HV Battery *2 Battery Voltage Sensor
*3 SMRB *4 SMRG
*5 SMRP *6 System Main Resistor
*7 Service Plug Grip *8 Inverter with Converter Assembly
*9 Boost Converter *10 Inverter
*11 Generator (MG1) *12 Motor (MG2)
*13 Compressor with Motor Assembly *14 A/C Inverter
*15 A/C Motor - -
*a High-voltage Areas *b INF Code 526 Vehicle Insulation Resistance Reduction Area
*c INF Code 611 Air Conditioning System Area *d INF Code 612 HV Battery Area
*e INF Code 613 Hybrid Vehicle Transmission Assembly Area *f INF Code 614 High Voltage Direct Current Area
*g Insulation Monitoring Circuit (Equipped with insulation malfunction detection circuit) - -
B002BEZE07
B002BEZE08

SYSTEM DESCRIPTION

Tech Tips

If a decrease in insulation resistance cannot be confirmed using a megohmmeter, check the Short Wave Highest Val in the Data List.


  1. SHORT WAVE HIGHEST VALUE


    1. "Short Wave Highest Val" indicates a decrease in insulation resistance and decreases the value as the insulation resistance decreases. In some cases, "Short Wave Highest Val" may decrease even though the insulation resistance of the vehicle is normal, therefore avoid checking "Short Wave Highest Val" when any of the following conditions exist.


      • Within approximately 1 minute has passed since the power switch was turned on (IG).

      • There is change of the system voltages ("Power Resource VB", "VL-Voltage before Boosting", and "VH-Voltage after Boosting").

      • During boosting, the Data List item "Boost Ratio" is not 0% or within a few seconds of it returned to 0%. (The values of "Power Resource VB", "VL-Voltage before Boosting" and "VH-Voltage after Boosting" are about the same when not boosting.)

    2. When "Short Wave Highest Val" is approximately 0 V, insulation resistance is close to 0 Ω. In this case, damage to a high-voltage cable or hybrid component (high-voltage), or a short to the body due to intrusion of foreign matter such as metal particles can be suspected.

  2. RELATED FREEZE FRAME DATA

    If problem symptoms cannot be reproduced and a malfunction still exists after replacing a part as instructed, checking the following freeze frame data can help determine a trouble area.

    Freeze Frame Data Diagnostic Note
    Short Wave Highest Val Indicates that the insulation resistance has decreased

    • VL-Voltage before Boosting

    • VH-Voltage after Boosting

    • Power Resource VB

    • Boost Ratio

    		 During boosting (when "Boost Ratio" is not 0%), or when "VL-Voltage before Boosting", "VH-Voltage after Boosting" or "Power Resource VB" is varying, "Short Wave Highest Val" may decrease even though the insulation resistance is normal.

    • SMRP Status

    • SMRB Status

    • SMRG Status

    When "SMRP Status", "SMRB Status" and "SMRG Status" are all OFF, the insulation malfunction detection circuit detects a decrease in insulation resistance in the HV battery area ((*d) in the wiring diagram).


    • Example:

      When the power switch is turned on (IG) (not on (READY)), all 3 system main relays are off and it is suspected that the HV battery assembly is disconnected from the high voltage circuits. If "Short Wave Highest Val" decreases a few minutes after the power switch is turned on (IG) (not on (READY)), the HV battery assembly may have an insulation malfunction.
    MG2 Gate Status When "MG2 Gate Status" is ON, the insulation malfunction detection circuit cannot detect a decrease in insulation resistance in the motor system AC (alternating current) section (motor (MG2) side of (*e) in the wiring diagram). The motor system AC (alternating current) section includes the motor (MG2) in the hybrid vehicle transmission assembly, motor cables and the AC (alternating current) section of the motor drive circuit in the inverter with converter assembly.
    MG1 Gate Status

    When "MG1 Gate Status" is ON, the insulation malfunction detection circuit cannot detect a decrease in insulation resistance in the generator system AC (alternating current) section (generator (MG1) side of (*e) in the wiring diagram).

    The generator system AC (alternating current) section includes the generator (MG1) in the hybrid vehicle transmission assembly, generator cables and the AC (alternating current) section of the generator drive circuit in the inverter with converter assembly.
    A/C Consumption Pwr

    When the air conditioning system is off (air conditioning system power consumption is 0 W), the insulation malfunction detection circuit cannot detect a decrease in insulation resistance in the compressor with motor assembly AC (alternating current) section ((*c) in the wiring diagram).

    The compressor with motor assembly AC (alternating current) section includes the air conditioning motor, wiring between the air conditioning motor and air conditioning inverter, and the AC (alternating current) section of the air conditioning motor drive circuit in the air conditioning inverter.

    With the vehicle stopped, turn on/off the air conditioning system and observe "Short Wave Highest Val" to use as a diagnosis reference.

    Tech Tips


    • Items to be checked using the freeze frame data. Reproducing the vehicle conditions the moment a DTC was stored according to the freeze frame data and results of the customer problem analysis helps ensure that the same DTC is stored again.

      Driving Status
      Item Diagnostic Note
      Vehicle Spd -
      Accel Pedal Pos #1 -
      Engine Revolution -
      Shift Sensor Shift Pos -
      Master Cylinder Ctrl Trq -
      Engine Coolant Temp -
      Operation Conditions
      Item Diagnostic Note
      Motor Temp No1

      If any liquid leaks into the ATF, insulation resistance may decrease only when the temperature is high.

      The motor temperature is likely to increase if the motor speed is low and output torque is high such as when cruising uphill slowly or accelerating from a low speed.
      Motor Temp No2

      If any liquid leaks into the ATF, insulation resistance may decrease only when the temperature is high.

      The generator temperature is likely to increase under repeat acceleration and deceleration while the vehicle is driven in the mid speed range (60 to 80 km/h (37 to 50 mph)).

    • Customer Problem Analysis

      Ask the customer about the operating conditions and environment when the malfunction occurred.

      Item Diagnostic Note
      Driving Condition (acceleration, deceleration, turning, etc.) Changes in the insulation of the parts with insufficient insulation due to changes in G force or vibration is suspected.
      Road Condition (unpaved, etc.)
      Weather (rain, snow, etc.) Water intrusion is suspected
      Washing the vehicle (Whether the malfunction occurred after washing the vehicle?)

  3. CONFIRMATION AFTER REPLACING PARTS


    1. After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output. (Do not turn the power switch off (READY off) during this inspection.)


      1. Apply the parking brake and secure the wheels using chocks.

      2. When the vehicle is stationary, turn the power switch on (READY) with the shift lever in P and wait for 60 seconds or more.

      3. Turn the air conditioning system on (MAX COLD, blower speed HI).

      4. While depressing the brake pedal without depressing the accelerator pedal, move the shift lever to D and wait for 5 minutes.

        If step (*) is performed within the same trip after DTC P0AA6-526 is stored, the parts with insufficient insulation resistance will be determined, and DTC one of the P0AA6-611, 612, 613 or 614 will be stored. (If no DTCs are output, proceed to the next step.)

      5. Drive the vehicle for approximately 5 minutes referring to the following freeze frame data items: "Vehicle Spd", "Shift Sensor Shift Pos", "Accel Pedal Pos #1", "Engine Revolution", "Engine Coolant Temp", "Master Cylinder Ctrl Trq", "Motor Temp MG2 (No2)" and "Motor Temp MG2 (No1)" (If the freeze frame data item "Vehicle Spd" is 10 km/h (6 mph) or less, drive the vehicle at 10 km/h (6 mph) or more.)

        If step (*) is performed within the same trip after DTC P0AA6-526 is stored, the parts with insufficient insulation resistance will be determined, and DTC one of the P0AA6-611, 612, 613 or 614 will be stored.

      6. Wait for 1 minute or more with the vehicle stopped, the power switch on (READY), the shift lever in P and the air conditioning system on (Lo/COOL MAX, blower speed HI), then turn the power switch off and wait for 1 minute or more. (*)

CAUTION / NOTICE / HINT

CAUTION:


  • When troubleshooting DTC P0AA6, use either a tool wrapped with vinyl insulation tape or an insulated tool. (It is extremely dangerous when a high-voltage charge passes through a non-insulated tool causing a short.)

  • 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.

  • When disposing of an HV battery, make sure to return it through an authorized collection agent who is capable of handling it safely. If the HV battery is returned via the manufacturer specified route, it will be returned properly and in a safe manner by an authorized collection agent.

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

When measuring insulation resistance using a megohmmeter, set the megohmmeter to 500 V.

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.

      Result
      Result Proceed to
      P0AA6 only is output. A
      P0AA6 and P0A1D are output. B
      P0AA6 and P0AA7 are output. C
      P0AA6 and P0AFC are output. D

    5. Turn the power switch off.


    B

    GO TO DTC CHART (P0A1D) Click here

    C

    GO TO DTC CHART (P0AA7) Click here

    D

    GO TO DTC CHART (P0AFC) Click here

    A

  2. CHECK INFORMATION CODE (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. Access the freeze frame data of DTC P0AA6 and read the INF code.

      Note


      • Information codes 611, 612, 613 and 614 are not stored with 526 simultaneously. If a drop in insulation resistance is detected and DTC P0AA6-526 is output, turn the power switch on (READY) and wait for 1 minute with the shift lever in D and the air conditioning system on, then turn the power switch off and wait for 1 minute to determine the information code (611, 612, 613 or 614).

      • If only DTC P0AA6-526 is output, perform the diagnosis procedure for INF code 526 to inspect all the high voltage circuits.

      • When any other INF codes indicating parts which the insulation resistance dropped are output, perform the diagnosis procedure for each INF code.

      Result
      Result Proceed to
      526 (decrease in the insulation resistance of the high-voltage circuit) only is output. A
      526 and 611 (decrease in the insulation resistance of the air conditioning system area) are output.

      Refer to the troubleshooting procedures for P0AA6-611 (Air conditioning system) Click here

      526 and 612 (decrease in the insulation resistance of the HV battery area) are output. B
      526 and 613 (decrease in the insulation resistance of the hybrid vehicle transmission assembly area) are output. C
      526 and 614 (decrease in the insulation resistance of the high-voltage direct current area) are output. D

    5. Turn the power switch off.


    B

    CHECK HV BATTERY JUNCTION BLOCK ASSEMBLY Click here

    C

    CHECK INVERTER WITH CONVERTER ASSEMBLY Click here

    D

    CHECK HIGH VOLTAGE DIRECT CURRENT AREA Click here

    A

  3. CHECK HYBRID VEHICLE TRANSMISSION ASSEMBLY (MOTOR CABLE)

    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. B002BL0E02
      Text in Illustration
      *A for LHD
      *B for RHD

      for Type A:


      1. Remove the inverter terminal cover from the inverter with converter assembly.

        Tech Tips

        Make sure that no foreign matter, coolant or water has entered the inverter assembly with converter. Confirm that the inverter coolant volume has not increased.

    3. B002BUKE03
      Text in Illustration
      *A for LHD
      *B for RHD

      for Type B:


      1. Remove the inverter terminal cover from the inverter with converter assembly.

        Tech Tips

        Make sure that no foreign matter, coolant or water has entered the inverter assembly with converter. Confirm that the inverter coolant volume has not increased.

    4. B002BU8E01
      Text in Illustration
      *A for LHD
      *B for RHD
      *1 Motor Cable
      *2 Generator Cable

      Disconnect the generator cable and motor cable from the inverter with converter assembly.

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

      Tech Tips

      The insulation resistance value changes due to the operation of the motor. Therefore, rotate the rear tires while performing this inspection.

    6. Turn the power switch on (IG).

      Note

      Turning the power switch on (IG) with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    7. Move the shift lever to N.

    8. Turn the power switch off.

    9. Lift up the vehicle.

    10. B002BQ5E01
      Text in Illustration
      *A for LHD
      *B for RHD
      *1 Shield Ground
      *a

      Motor Cable

      (Inverter with Converter Assembly Side)

      While rotating both rear tires 2 complete rotations by hand in the same direction, using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.

      Note


      • Be careful when performing this inspection, as current is generated from the motor when the tires are rotated by hand.

      • Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

      Standard Resistance
      for LHD
      Tester Connection Switch Condition Specified Condition
      u1-1 (U) - Body ground and shield ground Power switch off 100 MΩ or higher
      u1-2 (V) - Body ground and shield ground Power switch off 100 MΩ or higher
      u1-3 (W) - Body ground and shield ground Power switch off 100 MΩ or higher
      for RHD
      Tester Connection Switch Condition Specified Condition
      u3-1 (W) - Body ground and shield ground Power switch off 100 MΩ or higher
      u3-2 (V) - Body ground and shield ground Power switch off 100 MΩ or higher
      u3-3 (U) - Body ground and shield ground Power switch off 100 MΩ or higher

    11. Lower the vehicle.

    12. Move the shift lever to P.

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


    NG

    CHECK MOTOR CABLE Click here

    OK

  4. CHECK HYBRID VEHICLE TRANSMISSION ASSEMBLY (GENERATOR CABLE)

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

      Tech Tips

      The insulation resistance value changes due to the operation of the generator. Therefore, rotate the rear tires while performing this inspection.

    3. Turn the power switch on (IG).

      Note

      Turning the power switch on (IG) with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    4. Move the shift lever to N.

    5. Turn the power switch off.

    6. Lift up the vehicle.

    7. B002BUTE02
      Text in Illustration
      *A for LHD
      *B for RHD
      *1 Shield Ground
      *a

      Generator Cable

      (Inverter with Converter Assembly Side)

      While rotating both rear tires 2 complete rotations by hand in the same direction, using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.

      Note


      • Be careful when performing this inspection, as current is generated from the motor when the tires are rotated by hand.

      • Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

      Standard Resistance
      for LHD
      Tester Connection Switch Condition Specified Condition
      v3-3 (W) - Body ground and shield ground Power switch off 100 MΩ or higher
      v3-2 (V) - Body ground and shield ground Power switch off 100 MΩ or higher
      v3-1 (U) - Body ground and shield ground Power switch off 100 MΩ or higher
      for RHD
      Tester Connection Switch Condition Specified Condition
      v3-1 (W) - Body ground and shield ground Power switch off 100 MΩ or higher
      v3-2 (V) - Body ground and shield ground Power switch off 100 MΩ or higher
      v3-3 (U) - Body ground and shield ground Power switch off 100 MΩ or higher

    8. Lower the vehicle.

    9. Move the shift lever to P.

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


    NG

    CHECK GENERATOR CABLE Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING HARNESS)

    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. B002BMGE01
      Text in Illustration
      *A for LHD
      *B for RHD

      Remove the connector cover assembly from the inverter with converter assembly.

      Tech Tips

      Make sure that no foreign matter, coolant or water has entered the inverter assembly with converter. Confirm that the inverter coolant volume has not increased.

    3. B002C2ME01
      Text in Illustration
      *A for LHD
      *B for RHD

      Disconnect the air conditioning harness from the inverter with converter assembly.

      Tech Tips

      Make sure that no foreign matter has entered or contaminated the air conditioner harness.

    4. B002B79E01
      Text in Illustration
      *A for LHD
      *B for RHD
      *1 Shield Ground
      *a

      Front view of air conditioning harness connector

      (to Inverter with Converter Assembly)

      Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.

      Note

      Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

      Standard Resistance
      for LHD
      Tester Connection Switch Condition Specified Condition
      V3-1 (ACPE) - Body ground and shield ground Power switch off 3 MΩ or higher
      V3-2 (ACPB) - Body ground and shield ground Power switch off 3 MΩ or higher
      for RHD
      Tester Connection Switch Condition Specified Condition
      f1-1 (ACPE) - Body ground and shield ground Power switch off 3 MΩ or higher
      f1-2 (ACPB) - Body ground and shield ground Power switch off 3 MΩ or higher

    NG

    CHECK HARNESS AND CONNECTOR (AIR CONDITIONING HARNESS) Click here

    OK

  6. CHECK INVERTER WITH CONVERTER 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. B002BXDE04
      Text in Illustration
      *A for LHD
      *B for RHD

      Disconnect the connector of the No. 4 floor wire from the inverter with converter assembly.

      Tech Tips

      Make sure that no foreign objects have entered or contaminated the connector of the No. 4 floor wire.

    3. B002BMDE02
      Text in Illustration
      *1 High Voltage Fuse Terminal

      Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.

      Note

      Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      High voltage fuse terminal - Body ground Power switch off 1 MΩ or higher

      Tech Tips

      Perform this inspection with the motor cable, generator cable and air conditioning harness disconnected from the inverter with converter assembly.


    NG

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

    OK

  7. CHECK NO. 4 FLOOR 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. B002B6AE02
      Text in Illustration
      *1 Shield Ground
      *a

      Front view of No. 4 floor wire connector

      (to Inverter with Converter Assembly)

      Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.

      Note

      Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      V2-1 (CBI) - Body ground and shield ground Power switch off 10 MΩ or higher
      V2-2 (CEI) - Body ground and shield ground Power switch off 10 MΩ or higher

      Tech Tips

      Visually inspect the No. 4 floor wire for damage. If there is any damage, then this is the likely cause of low insulation resistance.


    NG

    CHECK NO. 4 FLOOR WIRE Click here

    OK

  8. CHECK HV BATTERY JUNCTION BLOCK ASSEMBLY

    CAUTION:

    Be sure to wear insulated gloves.

    Tech Tips

    Make sure that no foreign matter or water has entered the HV battery.


    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 upper hybrid battery cover sub-assembly Click here.

    3. Disconnect the 2 high voltage cable connectors of the HV battery from the hybrid battery junction block assembly.

    4. B002BXUE02
      Text in Illustration
      *a

      Component without harness connected

      (Hybrid Battery Junction Block Assembly)

      Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.

      Note

      Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      y2-1 (+) - Body ground Power switch off 10 MΩ or higher
      w2-1 (-) - Body ground Power switch off 10 MΩ or higher

    NG

    REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY Click here

    OK

  9. CHECK HV BATTERY AREA

    CAUTION:

    Be sure to wear insulated gloves.


    1. Be sure to wear insulated gloves.

      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. 4 hybrid vehicle battery shield sub-assembly Click here.

    3. B002B4DE02

      Disconnect the z23 battery voltage sensor connector.

      Tech Tips

      Make sure that no foreign matter has entered or contaminated the z23 battery voltage sensor connector.

    4. B002BZ8E01

      Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.

      Note

      Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1 - Body ground Power switch off 10 MΩ or higher
      2 - Body ground Power switch off 10 MΩ or higher

    NG

    REPLACE HV BATTERY Click here

    OK

  10. REPLACE BATTERY VOLTAGE SENSOR

    Click here


    NEXT

    PERFORM CONFIRMATION AFTER REPLACING PARTS

  11. REPLACE HV BATTERY

    Click here


    NEXT

    PERFORM CONFIRMATION AFTER REPLACING PARTS

  12. CHECK GENERATOR CABLE

    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 generator cable Click here.

    3. B002BUTE02
      Text in Illustration
      *A for LHD
      *B for RHD
      *1 Shield Ground
      *a

      Generator Cable

      (Inverter with Converter Assembly Side)

      Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.

      Note

      Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

      Standard Resistance
      for LHD
      Tester Connection Switch Condition Specified Condition
      v3-3 (W) - Body ground and shield ground Power switch off 100 MΩ or higher
      v3-2 (V) - Body ground and shield ground Power switch off 100 MΩ or higher
      v3-1 (U) - Body ground and shield ground Power switch off 100 MΩ or higher
      for RHD
      Tester Connection Switch Condition Specified Condition
      v3-1 (W) - Body ground and shield ground Power switch off 100 MΩ or higher
      v3-2 (V) - Body ground and shield ground Power switch off 100 MΩ or higher
      v3-3 (U) - Body ground and shield ground Power switch off 100 MΩ or higher

    NG

    REPLACE GENERATOR CABLE Click here

    OK

  13. REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY

    Click here


    NEXT

    PERFORM CONFIRMATION AFTER REPLACING PARTS

  14. CHECK MOTOR CABLE

    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 motor cable Click here.

    3. B002BQ5E01
      Text in Illustration
      *A for LHD
      *B for RHD
      *1 Shield Ground
      *a

      Motor Cable

      (Inverter with Converter Assembly Side)

      Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.

      Note

      Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

      Standard Resistance
      for LHD
      Tester Connection Switch Condition Specified Condition
      u1-1 (U) - Body ground and shield ground Power switch off 100 MΩ or higher
      u1-2 (V) - Body ground and shield ground Power switch off 100 MΩ or higher
      u1-3 (W) - Body ground and shield ground Power switch off 100 MΩ or higher
      for RHD
      Tester Connection Switch Condition Specified Condition
      u3-1 (W) - Body ground and shield ground Power switch off 100 MΩ or higher
      u3-2 (V) - Body ground and shield ground Power switch off 100 MΩ or higher
      u3-3 (U) - Body ground and shield ground Power switch off 100 MΩ or higher

    NG

    REPLACE MOTOR CABLE Click here

    OK

  15. REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY

    Click here


    NEXT

    PERFORM CONFIRMATION AFTER REPLACING PARTS

  16. CHECK INVERTER WITH CONVERTER ASSEMBLY

    CAUTION:

    Be sure to wear insulated gloves.


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

      Note

      Check that the service plug grip is not installed.

    2. B002BL0E02
      Text in Illustration
      *A for LHD
      *B for RHD

      for Type A:


      1. Remove the inverter terminal cover from the inverter with converter assembly.

        Tech Tips

        Make sure that no foreign matter, coolant or water has entered the inverter assembly with converter. Confirm that the inverter coolant volume has not increased.

    3. B002BUKE03
      Text in Illustration
      *A for LHD
      *B for RHD

      for Type B:


      1. Remove the inverter terminal cover from the inverter with converter assembly.

        Tech Tips

        Make sure that no foreign matter, coolant or water has entered the inverter assembly with converter. Confirm that the inverter coolant volume has not increased.

    4. B002BU8E01
      Text in Illustration
      *A for LHD
      *B for RHD
      *1 Motor Cable
      *2 Generator Cable

      Disconnect the generator cable and motor cable from the inverter with converter assembly.

    5. B002BMGE01
      Text in Illustration
      *A for LHD
      *B for RHD

      Remove the connector cover assembly from the inverter with converter assembly.

      Tech Tips

      Make sure that no foreign matter, coolant or water has entered the inverter assembly with converter. Confirm that the inverter coolant volume has not increased.

    6. B002BMDE03
      Text in Illustration
      *1 High Voltage Fuse Terminal

      Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.

      Note

      Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      High voltage fuse terminal - Body ground Power switch off 1 MΩ or higher

    NG

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

    OK

  17. CHECK MOTOR CABLE

    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 motor cable Click here.

    3. B002BQ5E01
      Text in Illustration
      *A for LHD
      *B for RHD
      *1 Shield Ground
      *a

      Motor Cable

      (Inverter with Converter Assembly Side)

      Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.

      Note

      Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

      Standard Resistance
      for LHD
      Tester Connection Switch Condition Specified Condition
      u1-1 (U) - Body ground and shield ground Power switch off 100 MΩ or higher
      u1-2 (V) - Body ground and shield ground Power switch off 100 MΩ or higher
      u1-3 (W) - Body ground and shield ground Power switch off 100 MΩ or higher
      for RHD
      Tester Connection Switch Condition Specified Condition
      u3-1 (W) - Body ground and shield ground Power switch off 100 MΩ or higher
      u3-2 (V) - Body ground and shield ground Power switch off 100 MΩ or higher
      u3-3 (U) - Body ground and shield ground Power switch off 100 MΩ or higher

    NG

    REPLACE MOTOR CABLE Click here

    OK

  18. CHECK GENERATOR CABLE

    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 generator cable Click here.

    3. B002BUTE02
      Text in Illustration
      *A for LHD
      *B for RHD
      *1 Shield Ground
      *a

      Generator Cable

      (Inverter with Converter Assembly Side)

      Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.

      Note

      Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

      Standard Resistance
      for LHD
      Tester Connection Switch Condition Specified Condition
      v3-3 (W) - Body ground and shield ground Power switch off 100 MΩ or higher
      v3-2 (V) - Body ground and shield ground Power switch off 100 MΩ or higher
      v3-1 (U) - Body ground and shield ground Power switch off 100 MΩ or higher
      for RHD
      Tester Connection Switch Condition Specified Condition
      v3-1 (W) - Body ground and shield ground Power switch off 100 MΩ or higher
      v3-2 (V) - Body ground and shield ground Power switch off 100 MΩ or higher
      v3-3 (U) - Body ground and shield ground Power switch off 100 MΩ or higher

    NG

    REPLACE GENERATOR CABLE Click here

    OK

  19. REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY

    Click here


    NEXT

    PERFORM CONFIRMATION AFTER REPLACING PARTS

  20. REPLACE GENERATOR CABLE

    Click here


    NEXT

    PERFORM CONFIRMATION AFTER REPLACING PARTS

  21. REPLACE MOTOR CABLE

    Click here


    NEXT

    PERFORM CONFIRMATION AFTER REPLACING PARTS

  22. CHECK HIGH VOLTAGE DIRECT CURRENT AREA

    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. B002BMGE01
      Text in Illustration
      *A for LHD
      *B for RHD

      Remove the connector cover assembly from the inverter with converter assembly.

      Tech Tips

      Make sure that no foreign matter, coolant or water has entered the inverter assembly with converter. Confirm that the inverter coolant volume has not increased.

    3. B002BXDE04
      Text in Illustration
      *A for LHD
      *B for RHD

      Disconnect the connector of the No. 4 floor wire from the inverter with converter assembly.

      Tech Tips

      Make sure that no foreign objects have entered or contaminated the connector of the No. 4 floor wire.

    4. B002B6AE01
      Text in Illustration
      *1 Shield Ground
      *a

      Front view of No. 4 floor wire connector

      (to Inverter with Converter Assembly)

      Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.

      Note

      Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      V2-1 (CBI) - Body ground and shield ground Power switch off 10 MΩ or higher
      V2-2 (CEI) - Body ground and shield ground Power switch off 10 MΩ or higher

      Tech Tips

      Visually inspect the No. 4 floor wire for damage. If there is any damage, then this is the likely cause of low insulation resistance.


    NG

    CHECK NO. 4 FLOOR WIRE Click here

    OK

  23. CHECK HARNESS AND CONNECTOR (AIR CONDITIONER HARNESS)

    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. B002C2ME01
      Text in Illustration
      *A for LHD
      *B for RHD

      Disconnect the air conditioning harness from the inverter with converter assembly.

      Tech Tips

      Make sure that no foreign matter has entered or contaminated the air conditioner harness.

    3. B002B79E01
      Text in Illustration
      *A for LHD
      *B for RHD
      *1 Shield Ground
      *a

      Front view of air conditioning harness connector

      (to Inverter with Converter Assembly)

      Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.

      Note

      Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

      Standard Resistance
      for LHD
      Tester Connection Switch Condition Specified Condition
      V3-1 (ACPE) - Body ground and shield ground Power switch off 3 MΩ or higher
      V3-2 (ACPB) - Body ground and shield ground Power switch off 3 MΩ or higher
      for RHD
      Tester Connection Switch Condition Specified Condition
      f1-1 (ACPE) - Body ground and shield ground Power switch off 3 MΩ or higher
      f1-2 (ACPB) - Body ground and shield ground Power switch off 3 MΩ or higher

    NG

    CHECK HARNESS AND CONNECTOR (AIR CONDITIONING HARNESS) Click here

    OK

  24. REPLACE INVERTER WITH CONVERTER ASSEMBLY

    Click here


    NEXT

    PERFORM CONFIRMATION AFTER REPLACING PARTS

  25. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING HARNESS)

    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. A000NBN

      Disconnect the V1*1 or f2*2 compressor with motor assembly connector.


      • *1: for LHD

      • *2: for RHD

    3. B002B79E01
      Text in Illustration
      *A for LHD
      *B for RHD
      *1 Shield Ground
      *a

      Front view of air conditioning harness connector

      (to Inverter with Converter Assembly)

      Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.

      Note

      Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

      Standard Resistance
      for LHD
      Tester Connection Switch Condition Specified Condition
      V3-1 (ACPE) - Body ground and shield ground Power switch off 10 MΩ or higher
      V3-2 (ACPB) - Body ground and shield ground Power switch off 10 MΩ or higher
      for RHD
      Tester Connection Switch Condition Specified Condition
      f1-1 (ACPE) - Body ground and shield ground Power switch off 10 MΩ or higher
      f1-2 (ACPB) - Body ground and shield ground Power switch off 10 MΩ or higher
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE NO. 4 FLOOR WIRE Click here

    C

    REPLACE AIR CONDITIONING HARNESS Click here

    A

  26. GO TO AIR CONDITIONING SYSTEM (P0AA6-611)

    Click here


    NEXT

    PERFORM CONFIRMATION AFTER REPLACING PARTS

  27. REPLACE NO. 4 FLOOR WIRE

    Click here


    NEXT

    PERFORM CONFIRMATION AFTER REPLACING PARTS

  28. REPLACE AIR CONDITIONING HARNESS


    NEXT

    PERFORM CONFIRMATION AFTER REPLACING PARTS

  29. CHECK NO. 4 FLOOR 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. 4 hybrid vehicle battery shield sub-assembly Click here.

    3. B002BHB

      Disconnect the No. 4 floor wire from the hybrid battery junction block assembly.

      Tech Tips

      Make sure that no foreign objects have entered or contaminated the No. 4 floor wire.

    4. B002C2XE02
      Text in Illustration
      *1 Shield Ground
      *2 Red Mark
      *a

      No. 4 Floor Wire

      (Hybrid Battery Junction Block Assembly Side)

      Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.

      Note

      Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      V4-1 (CEI) - Body ground and shield ground Power switch off 10 MΩ or higher
      V5-1 (CBI) - Body ground and shield ground Power switch off 10 MΩ or higher

      Tech Tips

      Visually inspect the No. 4 floor wire for damage. If there is any damage, then this is the likely cause of low insulation resistance.


    NG

    REPLACE NO. 4 FLOOR WIRE Click here

    OK

  30. REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

    Click here


    NEXT

    PERFORM CONFIRMATION AFTER REPLACING PARTS

  31. REPLACE NO. 4 FLOOR WIRE

    Click here


    NEXT

    PERFORM CONFIRMATION AFTER REPLACING PARTS