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Starter Signal Circuit [12/2013 - 11/2016]: Procedure

WARNING: This page is about a different car, the 2016 Toyota Highlander, 2015 Toyota Highlander, and 2014 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK WHETHER ENGINE CAN BE CRANKED 
    1. Check if the engine can be cranked.

      Result

      Result Proceed to
      Engine cannot be cranked A
      Engine can be cranked B

    Result:  2

    B 

    See step  18

    Result:  1

    A 

    See step  2

  2. READ VALUE USING TECHSTREAM (STARTER SIGNAL) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine / Data List / Primary / Starter Signal.

      Powertrain > Engine > Data List 

      Tester Display
      Starter Signal
    5. Check the value displayed on the Techstream when the ignition switch is turned to the ON and START positions.

      OK

      Ignition Switch Position Starter Signal
      ON OFF
      START ON

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    See step  12

    Result:  1

    OK 

    See step  3

  3. INSPECT RELAY (ST RELAY) 
    1. Inspect the ST relay.

      Refer to ON-VEHICLE INSPECTION [12/2013 - 11/2016]

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPLACE RELAY (ST RELAY) 

    Result:  1

    OK 

    See step  4

  4. INSPECT STARTER ASSEMBLY 
    1. Inspect the starter assembly.

      Refer to INSPECTION [12/2013 - 11/2016]

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPLACE STARTER ASSEMBLY. Refer to  REMOVAL [12/2013 - 11/2016] 

    Result:  1

    OK 

    See step  5

  5. CHECK HARNESS AND CONNECTOR (ST RELAY - STARTER ASSEMBLY) 
    1. Remove the ST relay from the No. 1 engine room relay block and No. 1 junction block assembly.
    2. Disconnect the starter assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      ST relay terminal 3 - C18-1 Always Below 1 Ω
      ST relay terminal 3 or C18-1 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  1

    OK 

    See step  6

  6. CHECK HARNESS AND CONNECTOR (BATTERY - STARTER ASSEMBLY) 
    1. Disconnect the cable from the negative (-) battery terminal.
    2. Disconnect the cable from the positive (+) battery terminal.
    3. Disconnect the starter assembly connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      Positive (+) battery terminal - D2-1 Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  1

    OK 

    See step  7

  7. CHECK HARNESS AND CONNECTOR (ST RELAY - BODY GROUND) 
    1. Remove the ST relay from the No. 1 engine room relay block and No. 1 junction block assembly.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      ST relay terminal 1 - Body ground Always Below 1 Ω

      Result

      Result Proceed to
      OK (w/o Smart Key System) A
      OK (w/ Smart Key System) B
      NG C

    Result:  2

    B 

    See step  11

    Result:  3

    C 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  1

    A 

    See step  8

  8. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSEMBLY - ST RELAY) 
    1. Remove the ST relay from the No. 1 engine room relay block and No. 1 junction block assembly.
    2. Disconnect the park/neutral position switch assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C14-9 (L) - ST relay terminal 2 Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  1

    OK 

    See step  9

  9. INSPECT IGNITION SWITCH ASSEMBLY 
    1. Inspect the ignition switch assembly.

      Refer to INSPECTION [12/2013 - 11/2016]

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPLACE IGNITION SWITCH ASSEMBLY. Refer to  REMOVAL [12/2013 - 11/2016] 

    Result:  1

    OK 

    See step  10

  10. CHECK HARNESS AND CONNECTOR (IGNITION SWITCH ASSEMBLY - ST RELAY) 
    1. Disconnect the ignition switch assembly connector.
    2. Remove the ST relay from the No. 1 engine room relay block and No. 1 junction block assembly.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F50-2 (ST2) - ST relay terminal 5 Always Below 1 Ω
      F50-2 (ST2) or ST relay terminal 5 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result:  1

    OK 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - IGNITION SWITCH ASSEMBLY) 

    Result:  2

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  11. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSEMBLY - ST RELAY) 
    1. Remove the ST relay from the No. 1 engine room relay block and No. 1 junction block assembly.
    2. Disconnect the park/neutral position switch assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C14-9 (L) - ST relay terminal 2 Always Below 1 Ω
      A43-9 (STA) - ST relay terminal 2 Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result:  1

    OK 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - ST RELAY) 

    Result:  2

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  12. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY 
    1. Inspect the park/neutral position switch assembly.

      for U660E: Refer to INSPECTION [12/2013 - 11/2016]

      for U660F: Refer to INSPECTION [12/2013 - 11/2016]

      Result

      Result Proceed to
      OK (w/o Smart Key System) A
      OK (w/ Smart Key System) B
      NG C

    Result:  2

    B 

    See step  16

    Result:  3

    C 

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY 

    for U660E: Refer to REMOVAL [12/2013 - 11/2016]

    for U660F: Refer to REMOVAL [12/2013 - 11/2016]

    Result:  1

    A 

    See step  13

  13. INSPECT IGNITION SWITCH ASSEMBLY 
    1. Inspect the ignition switch assembly.

      Refer to INSPECTION [12/2013 - 11/2016]

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPLACE IGNITION SWITCH ASSEMBLY. Refer to  REMOVAL [12/2013 - 11/2016] 

    Result:  1

    OK 

    See step  14

  14. CHECK HARNESS AND CONNECTOR (IGNITION SWITCH ASSEMBLY - PARK/NEUTRAL POSITION SWITCH ASSEMBLY - ECM) 
    1. Disconnect the park/neutral position switch assembly connector.
    2. Disconnect the ignition switch assembly connector.
    3. Disconnect the ECM connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F50-6 (ST1) - C14-4 (B) Always Below 1 Ω
      F50-6 (ST1) - C1-65 (NSW) Always Below 1 Ω
      F50-6 (ST1) or C14-4 (B) or C1-65 (NSW) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  1

    OK 

    See step  15

  15. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSEMBLY - ST RELAY - ECM) 
    1. Remove the ST relay from the No. 1 engine room relay block and No. 1 junction block assembly.
    2. Disconnect the park/neutral position switch assembly connector.
    3. Disconnect the ECM connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      ST relay terminal 2 - C14-9 (L) Always Below 1 Ω
      ST relay terminal 2 or C14-9 (L) or A43-9 (STA) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result:  1

    OK 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - IGNITION SWITCH ASSEMBLY) 

    Result:  2

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  16. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - PARK/NEUTRAL POSITION SWITCH ASSEMBLY - ECM) 
    1. Disconnect the park/neutral position switch assembly connector.
    2. Disconnect the certification ECU (smart key ECU assembly) connector.
    3. Disconnect the ECM connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F10-10 (STAR) - C14-4 (B) Always Below 1 Ω
      F10-10 (STAR) - C1-65 (NSW) Always Below 1 Ω
      F10-10 (STAR) or C14-4 (B) or C1-65 (NSW) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  1

    OK 

    See step  17

  17. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSEMBLY - ST RELAY - ECM - CERTIFICATION ECU) 
    1. Remove the ST relay from the No. 1 engine room relay block and No. 1 junction block assembly.
    2. Disconnect the park/neutral position switch assembly connector.
    3. Disconnect the ECM connector.
    4. Disconnect the certification ECU (smart key ECU assembly) connector.
    5. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      ST relay terminal 2 - C14-9 (L) Always Below 1 Ω
      ST relay terminal 2 or C14-9 (L) or A43-9 (STA) or F10-12 (STA) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result:  1

    OK 

    GO TO SMART KEY SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2013 - ] 

    Result:  2

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  18. READ VALUE USING TECHSTREAM (STARTER SIGNAL) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine / Data List / Primary / Starter Signal.

      Powertrain > Engine > Data List 

      Tester Display
      Starter Signal
    5. Check the value displayed on the Techstream when the ignition switch is turned to the ON and START positions.

      OK

      Ignition Switch Position Starter Signal
      ON OFF
      START ON

      Result

      Proceed to
      OK
      NG

    Result:  1

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [12/2013 - 11/2016] 

    Result:  2

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ST RELAY - ECM) 

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