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Distance Control ECU Power Source Circuit: Procedure

  1. CHECK DISTANCE CONTROL ECU (B VOLTAGE) 
    1. Disconnect the distance control ECU connector.
      GTY393725Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the engine switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      J17-1 (B) - Body ground Engine switch on (IG) 11 to 14 V
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Distance Control ECU)
    4. Reconnect the distance control ECU connector.

    NG → See step   3 

    OK: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (DISTANCE CONTROL ECU - BODY GROUND) 
    1. Disconnect the distance control ECU connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY262719Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      J17-10 (SGND) - Body ground Always Below 1 Ω
      J17-12 (GND) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Distance Control ECU)
    3. Reconnect the distance control ECU connector.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (DISTANCE CONTROL ECU - BODY GROUND) 

    OK → See step   8 

  3. INSPECT MAIN BODY ECU LH (LH-IG2 RELAY) 
    1. Disconnect the main body ECU LH connectors.
      GTY270755Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      LM-1 - LD-29 Battery voltage is not applied between terminals LD-13 and LD-8 10 kΩ or higher
      LM-1 - LD-29 Battery voltage applied between terminals LD-13 and LD-8 Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 Component without harness connected
      (Main Body ECU LH)
    3. Reconnect the main body ECU LH connectors.

    NG → REPLACE MAIN BODY ECU LH (LH-IG2 RELAY) 

    OK: Go to next step 

  4. CHECK HARNESS AND CONNECTOR (DISTANCE CONTROL ECU - MAIN BODY ECU LH) 
    1. Disconnect main body ECU LH connector.
      GTY394697Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the distance control ECU connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      J17-1 (B) - LD-29 Always Below 1 Ω

      Standard Resistance (Check for short)

      Tester Connection Condition Specified Condition
      J17-1 (B) or LD-29 - Body ground Always 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Distance Control ECU)
      *2 Front view of wire harness connector
      (to Main Body ECU LH)
    4. Reconnect the main body ECU LH connector.
    5. Reconnect the distance control ECU connector.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (DISTANCE CONTROL ECU - MAIN BODY ECU LH) 

    OK: Go to next step 

  5. CHECK HARNESS AND CONNECTOR (LH-IG2 RELAY POWER SOURCE) 
    1. Disconnect main body ECU LH connector.
      GTY262894Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      LM-1 - Body ground Always 11 to 14 V
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Main Body ECU LH)
    3. Reconnect the main body ECU LH connector.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU LH - BATTERY) 

    OK: Go to next step 

  6. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU LH - BODY GROUND) 
    1. Disconnect main body ECU LH connector.
      GTY268089Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      LD-8 - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Main Body ECU LH)
    3. Reconnect the main body ECU LH connector.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU LH - BODY GROUND) 

    OK: Go to next step 

  7. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU LH - POWER SOURCE CONTROL ECU) 
    1. Disconnect the main body ECU LH connector.
      GTY285179Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the power source control ECU connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      LD-13 - J55-34 (IG1D) Always Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      LD-13 or J55-34 (IG1D) - Body ground Always 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Power Source Control ECU)
      *2 Front view of wire harness connector
      (to Main Body ECU LH)
    4. Reconnect the main body ECU LH connector.
    5. Reconnect the power source control ECU connector.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU LH - POWER SOURCE CONTROL ECU) 

    OK → See step   9 

  8. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [08/2012 - ] 
  9. GO TO SMART ACCESS SYSTEM WITH PUSH-BUTTON START. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2012 - ] 
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