STOP AND START SYSTEM(for 2AR-FE) Backup Boost Converter Circuit

DESCRIPTION

A backup boost converter is built into the engine stop and start ECU. The backup boost converter helps maintain the power source voltage when the engine is restarted by stop and start control.

This prevents various functions such as the audio and visual system from malfunctioning if the power source voltage drops due to the battery voltage dropping when the engine is restarted by stop and start control.

If any DTCs are output, troubleshoot the DTCs first.

Tech Tips

A relay function and fuse function are provided in the backup boost converter.

If there is a malfunction in any of the electrical system circuits connected to the backup boost converter, the fuse and relay functions shut off the malfunctioning circuit to protect other circuits (remains shut off until next trip).

When the electrical system circuit is shut off, power to the circuit is cut off, causing any systems connected to the circuit to be disabled.

The fuse function is reset* when the engine switch is turned off. If the malfunction still exists in the electrical system circuit that has been shut off by the relay function, it will be shut off again by the relay and fuse functions the next time the engine switch is turned to on (IG).

*: A semiconductor fuse self resets according to electric signal.


    The backup boost converter supplies power to:

  • Vehicle stability control system

  • Power steering system

  • Navigation system

  • Rear seat entertainment system

  • CAN communication system

  • Meter / gauge system

  • Electric parking brake system

  • Air conditioning system

  • Digital rear-view mirror system

  • Blind spot monitor system

  • TOYOTA parking assist-sensor system


    The external backup boost converter (eco run vehicle converter assembly) supplies power to:

  • Navigation system

WIRING DIAGRAM

Refer to DTC P323A19.

Click here

CAUTION / NOTICE / HINT

Note


  • When replacing the engine stop and start ECU with a new one, make sure to download the previous status (number of starter operations) of the old engine stop and start ECU. After replacing the engine stop and start ECU, turn the engine switch on (IG) and wait 20 seconds, then confirm that "OK" is displayed for the Data List item [Stop&Start Operating Permission (Discharged Oil Pump Air)]. Then upload the previous status (number of starter operations) to the engine stop and start ECU.

    Click here

  • After replacing the engine stop and start ECU or air conditioning amplifier assembly, reset and perform learning of the air conditioning information in the engine stop and start ECU.

    Click here

  • After replacing the engine stop and start ECU or airbag ECU assembly, clear and calibrate the deceleration sensor zero point in the engine stop and start ECU.

    Click here

  • Inspect the fuses for circuits related to this system before performing the following procedure.

  • After replacing the engine stop and start ECU, perform learning of the external backup boost converter (eco run vehicle converter assembly).

    Click here

PROCEDURE


  1. CHECK PROBLEM SYMPTOMS


    1. Determine the trouble area by referring to the table below.

      Effect on Vehicle Trouble Area/Cause Fail-safe DTC Output Stop and start cancel indicator Symptom Proceed to

      When the engine is restarted by stop and start control:

      The following symptoms may occur


      • Navigation system (audio and visual system) is reset

      • The combination meter assembly fades out

      • The steering wheel feels heavy when the engine is restarted*

      Backup boost converter internal malfunction


      • Internal power source malfunction

      • Internal power source overvoltage

      • CPU duty malfunction

      • Communication cycle error

      		 Stop and start control prohibited

      P323A00

      P323AA2

      P323B29

      P323B38

      		 Blinks Systems stop operating during engine restart as the backup boost converter output voltage cannot be boosted A
      Battery voltage drop

      Systems on the converter output side do not operate

      B42 terminal: Both of the following will not operate


      • Navigation system (audio and visual system) is reset

      • Rear seat entertainment system

      B43 terminal: Both of the following will not operate


      • Air conditioning system

      • Digital rear-view mirror system

      IG41 terminal: All of the following will not operate


      • Air conditioning system

      • TOYOTA parking assist-sensor system

      • Blind spot monitor system

      • CAN communication system

      OP21 terminal: The oil pump with motor assembly will not operate

      		 Overcurrent applied to an output terminal (output terminal relay circuit is shutoff)

      Stop and start control is prohibited

      (Connected ECUs or sensors may detect power source malfunction DTCs)

      		 P323A19 Blinks Systems do not operate as power supply from the converter is cut off A

      Systems do not operate

      (Due to converter input side malfunction)

      IG1 terminal: All of the following will not operate


      • Vehicle stability control system

      • Power steering system

      • CAN communication system

      • Air conditioning system

      • TOYOTA parking assist-sensor system

      • Blind spot monitor system

      IG2 terminal: The meter / gauge system will not operate

      ACC terminal:


      • Air conditioning system

      • Navigation system (audio and visual system) is reset

      • Rear seat entertainment system

      Converter input circuit malfunction


      • Open or short to GND in IG1 circuit

      • Open or short to GND in IG2 circuit

      • Open or short to GND in ACC circuit

      		 Stop and start control prohibited - Does not blink (Blinks when communication error DTCs are stored) Systems do not operate as power supply from the converter is cut off B

      Systems on the converter output side do not operate

      (varies depending on the malfunctioning relay circuit the converter detected)

      AC41 terminal: Both of the following will not operate


      • Air conditioning system

      • Navigation system (audio and visual system)

      • Rear seat entertainment system

      IG11 terminal:


      • The power steering system will not operate

      IG12 terminal:


      • The meter / gauge system will not operate

      IG31 terminal:


      • The vehicle stability control system will not operate

      B11 terminal: The electric parking brake system will not operate

      IL41 terminal: The air conditioning system will not operate

      Malfunction in circuits the converter supplies power to

      (between the converter and ECUs or sensors)

      		 Related systems do not operate as the relay circuit in the converter is turned off - Does not blink (Blinks when communication error DTCs are stored) Systems do not operate as power supply from the converter is cut off B

      All of the following systems do not operate


      • Navigation system (audio and visual system)

      • Rear seat entertainment system

      • Power steering system

      • Electric parking brake system

      • Meter / Gauge system

      • Vehicle stability control system

      • TOYOTA parking assist-sensor system

      • Air conditioning system

      • CAN communication system

      • Digital rear-view mirror system

      • Blind spot monitor system

      • Open in BBC fuse circuit

      • Short in converter circuit

      • Backup boost converter malfunction

      		 Stop and start control prohibited P061519 Does not blink (Due to disabled meter / gauge system) All systems that the converter supplies power to do not operate (see circuit diagram) A

      P30DF62

      P30EF48

      P323A00

      P323A16

      P323AA2

      P323B29

      P323B38

      The audio does not operate

      (until the engine switch is turned off)

      Excessive audio volume

      Data List item [State of BBC] or [State of External BBC] displays [BBC Overcurrent] while the circuit is protected

      		 The relay circuit in the converter is turned off to cut off power supply to the navigation system (audio and visual system) (Returns to normal when the engine switch is turned off) - Does not blink

      If overcurrent is detected in the navigation system (audio and visual system), system operation is disabled while the engine switch is on (IG)

      (Returns to normal when the engine switch is turned off)

      		 C

      • The combination meter assembly cannot be turned off (short between IG12 and +B)

      • Communication error DTCs may be stored due to short between AC41 and +B

      Tech Tips

      Varies depending on the number of times an open occurs in the +B circuit

      Converter circuit malfunction


      • Short between IG12 and +B

      • Short between AC41 and +B

      		 - - Does not blink The converter cannot shut off the power source when the engine switch is turned off B

      • Engine switch cannot be turned off from on (ACC) (short between ACC and +B)

      • Engine switch cannot be turned off from IG (short between IG1 or IG2 and +B)

      Engine stop and start ECU power source circuit malfunction


      • Short between ACC and +B

      • Short between IG1 and +B

      • Short between IG2 and +B

      		 - - Does not blink Engine switch cannot be turned off B
      The audio and visual system cannot be turned off (short between ACC and BIN)

      External backup boost converter (eco run vehicle converter assembly) circuit malfunction


      • Short between ACC and BIN

      		 - - Does not blink The external backup boost converter (eco run vehicle converter assembly) cannot shut off the power source when the engine switch is turned off D

      • *: A DTC may be stored in the power steering system

      Result
      Proceed to
      A
      B
      C
      D

    A

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    C

    CHECK NAVIGATION SYSTEM Click here

    D

    CHECK HARNESS AND CONNECTOR (BIN TERMINAL POWER SOURCE CIRCUIT) Click here

    B

  2. CHECK HARNESS AND CONNECTOR (BIN1 AND BIN2 TERMINALS POWER SOURCE CIRCUIT)

    B006MQSC42
    *a

    Front view of wire harness connector

    (to Engine Stop and Start ECU)

    1. Disconnect the engine stop and start ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A59-1 (BIN2) - Body ground Always 9.5 to 14 V
      A59-3 (BIN1) - Body ground Always 9.5 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ENGINE STOP AND START ECU - BATTERY)

    OK

  3. CHECK HARNESS AND CONNECTOR (IG2 TERMINALS POWER SOURCE CIRCUIT)

    B006PJRC77
    *a

    Front view of wire harness connector

    (to Engine Stop and Start ECU)

    1. Disconnect the engine stop and start ECU connectors.

    2. Turn the engine switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G50-18 (IG2) - Body ground Engine switch on (IG) 9.5 to 14 V

    4. Turn the engine switch to off.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G50-18 (IG2) - Body ground Engine switch off 0 to 1 V
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - JUNCTION BLOCK ASSEMBLY LH) Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (IG1, ACC AND ILL TERMINALS POWER SOURCE CIRCUIT)

    B006PJRC80
    *a

    Front view of wire harness connector

    (to Engine Stop and Start ECU)

    1. Disconnect the engine stop and start ECU connector.

    2. Turn the engine switch on (ACC).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G50-19 (ACC) - Body ground Engine switch on (ACC) 9.5 to 14 V

    4. Turn the engine switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G50-21 (IG1) - Body ground Engine switch on (IG) 9.5 to 14 V

    6. Turn the headlight dimmer switch (light control switch) to the tail or head position.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G50-20 (ILL) - Body ground Headlight dimmer switch (light control switch) in tail or head position 9.5 to 14 V

    8. Turn headlight dimmer switch (light control switch) to off.

    9. Turn the engine switch to off.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G50-19 (ACC) - Body ground Engine switch off 0 to 1 V
      G50-21 (IG1) - Body ground Engine switch off 0 to 1 V
      G50-20 (ILL) - Body ground Headlight dimmer switch (light control switch) to off 0 to 1 V
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - JUNCTION BLOCK ASSEMBLY LH) Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - EACH ECU OR SENSOR)


    1. Disconnect the connector from the corresponding system ECU/sensor.

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

      Standard Resistance
      Parking Brake ECU Assembly
      Tester Connection Condition Specified Condition
      G50-23 (B11) - K14-3 (BECU) Always Below 1 Ω
      G50-23 (B11) or K14-3 (BECU) - Body ground and other terminals Always 10 kΩ or higher
      Navigation Receiver Assembly (w/ Navigation System)
      Tester Connection Condition Specified Condition
      G50-12 (B42) - F1-4 (+B1) Always Below 1 Ω
      G50-24 (AC41) - F1-3 (ACC1) Always Below 1 Ω
      G50-12 (B42) or F1-4 (+B1) - Body ground and other terminals Always 10 kΩ or higher
      G50-24 (AC41) or F1-3 (ACC1) - Body ground and other terminals Always 10 kΩ or higher
      Television Display Assembly (w/ Rear Seat Entertainment System)
      Tester Connection Condition Specified Condition
      G50-12 (B42) - S36-1 (+B) Always Below 1 Ω
      G50-24 (AC41) - S36-2 (ACC) Always Below 1 Ω
      G50-12 (B42) or S36-1 (+B) - Body ground and other terminals Always 10 kΩ or higher
      G50-24 (AC41) or S36-2 (ACC) - Body ground and other terminals Always 10 kΩ or higher
      Air Conditioning Control Assembly
      Tester Connection Condition Specified Condition
      G50-3 (IG41) - G30-5 (IG+) Always Below 1 Ω
      G50-11 (B43) - G30-1 (+B) Always Below 1 Ω
      G50-24 (AC41) - G30-6 (ACC) Always Below 1 Ω
      G50-25 (IL41) - G30-2 (ILL+) Always Below 1 Ω
      G50-3 (IG41) or G30-5 (IG+) - Body ground and other terminals Always 10 kΩ or higher
      G50-11 (B43) or G30-1 (+B) - Body ground and other terminals Always 10 kΩ or higher
      G50-24 (AC41) or G30-6 (ACC) - Body ground and other terminals Always 10 kΩ or higher
      G50-25 (IL41) or G30-2 (ILL+) - Body ground and other terminals Always 10 kΩ or higher
      Power Steering ECU Assembly
      Tester Connection Condition Specified Condition
      G50-6 (IG11) - G20-1 (IG) Always Below 1 Ω
      G50-6 (IG11) or G20-1 (IG) - Body ground and other terminals Always 10 kΩ or higher
      Combination Meter Assembly
      Tester Connection Condition Specified Condition
      G50-10 (IG12) - G16-2 (IG+) Always Below 1 Ω
      G50-10 (IG12) or G16-2 (IG+) - Body ground and other terminals Always 10 kΩ or higher
      Skid Control ECU (Brake Actuator Assembly)
      Tester Connection Condition Specified Condition
      G50-1 (IG31) - A50-12 (IG1) Always Below 1 Ω
      G50-1 (IG31) or A50-12 (IG1) - Body ground and other terminals Always 10 kΩ or higher
      Spiral with Sensor Cable Sub-assembly
      Tester Connection Condition Specified Condition
      G50-1 (IG31) - G12-4 (IG) Always Below 1 Ω
      G50-1 (IG31) or G12-4 (IG) - Body ground and other terminals Always 10 kΩ or higher
      Clearance Warning ECU Assembly
      Tester Connection Condition Specified Condition
      G50-3 (IG41) - G59-1 (IG) Always Below 1 Ω
      G50-3 (IG41) or G59-1 (IG) - Body ground and other terminals Always 10 kΩ or higher
      Integration Control and Panel Assembly
      Tester Connection Condition Specified Condition
      G50-3 (IG41) - S8-7 (IG) Always Below 1 Ω
      G50-25 (IL41) - S8-1 (ILL+) Always Below 1 Ω
      G50-3 (IG41) or S8-7 (IG) - Body ground and other terminals Always 10 kΩ or higher
      G50-25 (IL41) or S8-1 (ILL+) - Body ground and other terminals Always 10 kΩ or higher
      Central Gateway ECU (Network Gateway ECU)
      Tester Connection Condition Specified Condition
      G50-3 (IG41) - G116-11 (IG1) Always Below 1 Ω
      G50-3 (IG41) or G116-11 (IG1) - Body ground and other terminals Always 10 kΩ or higher
      Blind Spot Monitor Sensor RH (w/ Blind Spot Monitor System)
      Tester Connection Condition Specified Condition
      G50-3 (IG41) - L40-5 (BRB) Always Below 1 Ω
      G50-3 (IG41) or L40-5 (BRB) - Body ground and other terminals Always 10 kΩ or higher
      Blind Spot Monitor Sensor LH (w/ Blind Spot Monitor System)
      Tester Connection Condition Specified Condition
      G50-3 (IG41) - K40-5 (BLB) Always Below 1 Ω
      G50-3 (IG41) or K40-5 (BLB) - Body ground and other terminals Always 10 kΩ or higher
      Inner Rear View Mirror Assembly
      Tester Connection Condition Specified Condition
      G50-11 (B43) - S44-6 (+B) Always Below 1 Ω
      G50-11 (B43) or S44-6 (+B) - Body ground and other terminals Always 10 kΩ or higher
      Option Connector (for Audioless Type)
      Tester Connection Condition Specified Condition
      G50-12 (B42) - F16-4 (B) Always Below 1 Ω
      G50-24 (AC41) - F16-3 (ACC) Always Below 1 Ω
      G50-12 (B42) - F16-4 (B) - Body ground and other terminals Always 10 kΩ or higher
      G50-24 (AC41) or F16-3 (ACC) - Body ground and other terminals Always 10 kΩ or higher
      Option Connector (Rear Display)
      Tester Connection Condition Specified Condition
      G50-12 (B42) - S37-5 (B) Always Below 1 Ω
      G50-12 (B42) or S37-5 (B) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK ENGINE STOP AND START ECU (OUTPUT VOLTAGE FOR EACH SYSTEM)


    1. Disconnect the connector from the corresponding system ECU/sensor.

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

      Tech Tips

      Measure the voltage at the corresponding terminals.

      Standard Voltage
      Tester Connection Condition Specified Condition
      K14-3 (BECU) - Body ground Always 10.5 to 16 V
      F1-4 (+B1) - Body ground*1 Always 10.5 to 16 V
      S36-1 (+B) - Body ground*2 Always 10.5 to 16 V
      G30-1 (+B) - Body ground Always 10.5 to 16 V
      F16-4 (B) - Body ground*3 Always 10.5 to 16 V
      S37-5 (B) - Body ground*4 Always 10.5 to 16 V

      • *1: w/ Navigation System

      • *2: w/ Rear Seat Entertainment System

      • *3: Option Connector (for Audioless Type)

      • *4: Option Connector (Rear Display)

    3. Turn the engine switch to on (ACC).

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

      Tech Tips

      Measure the voltage at the corresponding terminals.

      Standard Voltage
      Tester Connection Condition Specified Condition
      F1-3 (ACC1) - Body ground*1 Engine switch on (ACC) 10.5 to 16 V
      S36-2 (ACC) - Body ground*2 Engine switch on (ACC) 10.5 to 16 V
      G30-6 (ACC) - Body ground Engine switch on (ACC) 10.5 to 16 V
      F16-3 (ACC) - Body ground*3 Engine switch on (ACC) 10.5 to 16 V

      • *1: w/ Navigation System

      • *2: w/ Rear Seat Entertainment System

      • *3: Option Connector (for Audioless Type)

    5. Turn the engine switch on (IG).

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

      Tech Tips

      Measure the voltage at the corresponding terminals.

      Standard Voltage
      Tester Connection Condition Specified Condition
      G20-1 (IG) - Body ground Engine switch on (IG) 10.5 to 16 V
      G16-2 (IG+) - Body ground Engine switch on (IG) 10.5 to 16 V
      A50-12 (IG1) - Body ground Engine switch on (IG) 10.5 to 16 V
      G12-4 (IG) - Body ground Engine switch on (IG) 10.5 to 16 V
      G59-1 (IG) - Body ground Engine switch on (IG) 10.5 to 16 V
      G30-5 (IG+) - Body ground Engine switch on (IG) 10.5 to 16 V
      S8-7 (IG) - Body ground Engine switch on (IG) 10.5 to 16 V
      G116-11 (IG1) - Body ground Engine switch on (IG) 10.5 to 16 V
      L40-5 (BRB) - Body ground* Engine switch on (IG) 10.5 to 16 V
      K40-5 (BLB) - Body ground* Engine switch on (IG) 10.5 to 16 V

      • *: w/ Blind spot monitor system

    7. Turn the headlight dimmer switch (light control switch) to the tail or head position.

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

      Tech Tips

      Measure the voltage at the corresponding terminals.

      Standard Voltage
      Tester Connection Condition Specified Condition
      G30-2 (ILL+) - Body ground Headlight dimmer switch (light control switch) in tail or head position 10.5 to 16 V
      S8-1 (ILL+) - Body ground Headlight dimmer switch (light control switch) in tail or head position 10.5 to 16 V
      Result
      Proceed to
      OK
      NG

    OK

    CHECK POWER SOURCE CIRCUIT (POWER SOURCE CIRCUIT OF RELATED SYSTEM)

    NG

    REPLACE ENGINE STOP AND START ECU Click here

  7. CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - JUNCTION BLOCK ASSEMBLY LH)


    1. Disconnect the engine stop and start ECU connector.

    2. Disconnect the junction block assembly LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G50-19 (ACC) - 4A-49 Always Below 1 Ω
      G50-20 (ILL) - 4A-36 Always Below 1 Ω
      G50-21 (IG1) - 4A-51 Always Below 1 Ω
      G50-19 (ACC) or 4A-49 - Body ground and other terminals Always 10 kΩ or higher
      G50-20 (ILL) or 4A-36 - Body ground and other terminals Always 10 kΩ or higher
      G50-21 (IG1) or 4A-51 - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE JUNCTION BLOCK ASSEMBLY LH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  8. CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - JUNCTION BLOCK ASSEMBLY LH)


    1. Disconnect the engine stop and start ECU connector.

    2. Disconnect the junction block assembly LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G50-18 (IG2) - 4A-50 Always Below 1 Ω
      G50-18 (IG2) or 4A-50 - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. INSPECT JUNCTION BLOCK ASSEMBLY LH


    1. Remove the junction block assembly LH.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      4F-5 - 4A-50 Always Below 1 Ω
      4F-5 or 4A-50 - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE JUNCTION BLOCK ASSEMBLY LH Click here

    OK

  10. CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - JUNCTION BLOCK ASSEMBLY LH)


    1. Disconnect the No. 1 integration relay connector.

    2. Disconnect the junction block assembly LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1D-1 - 4F-5 Always Below 1 Ω
      1D-1 or 4F-5 - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE NO.1 INTEGRATION RELAY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  11. CHECK NAVIGATION SYSTEM


    1. Turn the engine switch off and wait for 1 minute.

    2. Turn the engine switch on (IG).

    3. Lower the audio volume.

    4. Check if the navigation system (audio and visual system) operates normally.

      OK
      Navigation system (audio and visual system) operates normally.
      Result
      Proceed to
      OK
      NG

    OK

    END

    NG

  12. CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - NAVIGATION RECEIVER ASSEMBLY, TELEVISION DISPLAY ASSEMBLY OR OPTION CONNECTOR (REAR DISPLAY))


    1. Disconnect the engine stop and start ECU connector.

    2. Disconnect the navigation receiver assembly connector.

    3. Disconnect the television display assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G50-12 (B42), F1-4 (+B1), S36-1 (+B) or S37-5 (B)* - Body ground Always 10 kΩ or higher

      *: Option connector (Rear Display)

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  13. CHECK HARNESS AND CONNECTOR (EXTERNAL BACKUP BOOST CONVERTER (ECO RUN VEHICLE CONVERTER ASSEMBLY) - STEREO COMPONENT AMPLIFIER ASSEMBLY)


    1. Disconnect the external backup boost converter (eco run vehicle converter assembly) connector.

    2. Disconnect the stereo component amplifier assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A20-5 (BO1), F6-1 (+B) or F6-16 (+B2) - Body ground and other terminals Always 10 kΩ or higher
      A20-12 (ACO) or F7-12 (ACC) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    GO TO NAVIGATION SYSTEM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  14. CHECK HARNESS AND CONNECTOR (BIN TERMINAL POWER SOURCE CIRCUIT)

    B006L35C16
    *a

    Front view of wire harness connector

    (to External Backup Boost Converter (Eco Run Vehicle Converter Assembly))

    1. Disconnect the external backup boost converter (eco run vehicle converter assembly) connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A20-11 (BIN) - Body ground Always 9.5 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (EXTERNAL BACKUP BOOST CONVERTER (ECO RUN VEHICLE CONVERTER ASSEMBLY) - BATTERY)

    OK

  15. CHECK HARNESS AND CONNECTOR (ACC TERMINAL POWER SOURCE CIRCUIT)

    B006L35C17
    *a

    Front view of wire harness connector

    (to External Backup Boost Converter (Eco Run Vehicle Converter Assembly))

    1. Disconnect the external backup boost converter (eco run vehicle converter assembly) connector.

    2. Turn the engine switch on (ACC).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A20-3 (ACC) - Body ground Engine switch on (ACC) 9.5 to 14 V

    4. Turn the engine switch off.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A20-3 (ACC) - Body ground Engine switch off 0 to 1 V
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (EXTERNAL BACKUP BOOST CONVERTER (ECO RUN VEHICLE CONVERTER ASSEMBLY) - JUNCTION BLOCK ASSEMBLY LH) Click here

    OK

  16. CHECK HARNESS AND CONNECTOR (EXTERNAL BACKUP BOOST CONVERTER (ECO RUN VEHICLE CONVERTER ASSEMBLY) - BODY GROUND)


    1. Disconnect the external backup boost converter (eco run vehicle converter assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A20-6 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  17. CHECK HARNESS AND CONNECTOR (EXTERNAL BACKUP BOOST CONVERTER (ECO RUN VEHICLE CONVERTER ASSEMBLY) - STEREO COMPONENT AMPLIFIER ASSEMBLY)


    1. Disconnect the external backup boost converter (eco run vehicle converter assembly) connector.

    2. Disconnect the stereo component amplifier assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A20-5 (BO1) - F6-1 (+B) Always Below 1 Ω
      A20-5 (BO1) - F6-16 (+B2) Always Below 1 Ω
      A20-12 (ACO) - F7-12 (ACC) Always Below 1 Ω
      A20-5 (BO1), F6-1 (+B) or F6-16 (+B2) - Body ground and other terminals Always 10 kΩ or higher
      A20-12 (ACO) or F7-12 (ACC) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  18. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY POWER SOURCE CIRCUIT)


    1. Disconnect the stereo component amplifier assembly connectors.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F6-1 (+B) - Body ground Always 10.5 to 16 V
      F6-16 (+B2) - Body ground Always 10.5 to 16 V

    3. Turn the engine switch on (ACC).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F7-12 (ACC) - Body ground Engine switch on (ACC) 10.5 to 16 V
      Result
      Proceed to
      OK
      NG

    OK

    GO TO NAVIGATION SYSTEM Click here

    NG

    REPLACE EXTERNAL BACKUP BOOST CONVERTER (ECO RUN VEHICLE CONVERTER ASSEMBLY) Click here

  19. CHECK HARNESS AND CONNECTOR (EXTERNAL BACKUP BOOST CONVERTER (ECO RUN VEHICLE CONVERTER ASSEMBLY) - JUNCTION BLOCK ASSEMBLY LH)


    1. Disconnect the external backup boost converter (eco run vehicle converter assembly) connector.

    2. Disconnect the junction block assembly LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A20-3 (ACC) - 4A-53 Always Below 1 Ω
      A20-3 (ACC) or 4A-53 - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE JUNCTION BLOCK ASSEMBLY LH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR