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Starter Signal Circuit [08/2015 - 11/2017]: Procedure

WARNING: This page is about a different variant/trim than selected.
  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: 

    B 

    See step  18

    Result: 

    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 and ECT / Data List / Starter Signal.
    5. Check the value displayed on the Techstream when the ignition switch is turned to the ON and START position.

      OK

      Ignition Switch Position Starter Signal
      ON OFF
      START ON

    Result: 

    NG 

    See step  11

    Result: 

    OK 

    See step  3

  3. INSPECT ST RELAY 
    1. Inspect the ST relay (Refer to INSPECTION [08/2015 - ] ).

    Result: 

    NG 

    REPLACE ST RELAY 

    Result: 

    OK 

    See step  4

  4. CHECK TERMINAL VOLTAGE (POWER SOURCE OF ST RELAY) 
    GTY604253Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Remove the ST relay from the engine room relay block.
    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      5 (ST relay holder) - Body ground Ignition switch ON 11 to 14 V
      TEXT IN ILLUSTRATION

      *1 Engine Room Relay Block
      *2 ST Relay Holder

    Result: 

    NG 

    See step  9

    Result: 

    OK 

    See step  5

  5. CHECK HARNESS AND CONNECTOR (ST RELAY - STARTER ASSEMBLY) 
    1. Remove the ST relay from the engine room relay block.
    2. Disconnect the S6 starter assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      3 (ST relay holder) - S6-1 Always Below 1 Ω
      3 (ST relay holder) or S6-1 - Body ground Always 10 kΩ or higher

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    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 S6 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 - S5-1 Always Below 1 Ω

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  7

  7. CHECK HARNESS AND CONNECTOR (ST RELAY - BODY GROUND) 
    1. Remove the ST relay from the engine room relay block.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      2 (ST relay holder) - Body ground Always Below 1 Ω

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  8

  8. CHECK HARNESS AND CONNECTOR (ST RELAY - ECM) 
    1. Remove the ST relay from the engine room relay block.
    2. Disconnect the E18 ECM connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      1 (ST relay holder) - E18-17 (STA) Always Below 1 Ω
      1 (ST relay holder) or E18-17 (STA) - Body ground Always 10 kΩ or higher

    Result: 

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

    (Refer to PROBLEM SYMPTOMS TABLE [08/2015 - 11/2017] )

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  9. INSPECT IGNITION OR STARTER SWITCH ASSEMBLY 
    1. Inspect the ignition or starter switch assembly (Refer to INSPECTION [08/2015 - ] ).

    Result: 

    NG 

    REPLACE IGNITION OR STARTER SWITCH ASSEMBLY 

    (Refer to REMOVAL [08/2015 - ] )

    Result: 

    OK 

    See step  10

  10. CHECK HARNESS AND CONNECTOR (ST RELAY - ECM) 
    1. Remove the ST relay from the engine room relay block.
    2. Disconnect the I7 ignition or starter switch assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      5 (ST relay holder) - I7-7 (ST2) Always Below 1 Ω
      5 (ST relay holder) or I7-7 (ST2) - Body ground Always 10 kΩ or higher

    Result: 

    OK 

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

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  11. INSPECT IGNITION OR STARTER SWITCH ASSEMBLY 
    1. Inspect the ignition or starter switch assembly (Refer to INSPECTION [08/2015 - ] ).
      RESULT

      Result Proceed to
      OK
      (for Automatic Transmission)      		 A
      OK
      (for Manual Transmission)      		 B
      NG C

    Result: 

    B 

    See step  15

    Result: 

    C 

    REPLACE IGNITION OR STARTER SWITCH ASSEMBLY 

    (Refer to REMOVAL [08/2015 - ] )

    Result: 

    A 

    See step  12

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

      Result Proceed to
      OK A
      NG
      (for AC60F Automatic Transmission)      		 B
      NG
      (for AC60E Automatic Transmission)      		 C

    Result: 

    B 

    REPLACE PARK/NEUTRAL POSITION SWITCH 

    (Refer to REMOVAL [08/2015 - ] )

    Result: 

    C 

    REPLACE PARK/NEUTRAL POSITION SWITCH 

    (Refer to REMOVAL [08/2015 - ] )

    Result: 

    A 

    See step  13

  13. CHECK HARNESS AND CONNECTOR (IGNITION SWITCH - PARK/NEUTRAL POSITION SWITCH - ECM) 
    1. Disconnect the I7 ignition or starter switch assembly connector.
    2. Disconnect the P1 park/neutral position switch connector.
    3. Disconnect the E18 ECM connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      I7-6 (ST1) - P1-4 (B) Always Below 1 Ω
      I7-6 (ST1) - E18-15 (NSW) Always Below 1 Ω
      I7-6 (ST1), P1-4 (B) or E18-15 (NSW) - Body ground Always 10 kΩ or higher

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  14

  14. CHECK HARNESS AND CONNECTOR (ST RELAY - ECM - PARK/NEUTRAL POSITION SWITCH) 
    1. Remove the ST relay from the engine room relay block.
    2. Disconnect the E18 ECM connector.
    3. Disconnect the P1 park/neutral position switch connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      P1-5 (L) - E18-17 (STA) Always Below 1 Ω
      E18-17 (STA) - 1 (ST relay holder) Always Below 1 Ω
      1 (ST relay holder), P1-5 (L) or E18-17 (STA) - Body ground Always 10 kΩ or higher

    Result: 

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

    (Refer to PROBLEM SYMPTOMS TABLE [08/2015 - 11/2017] )

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  15. INSPECT CLUTCH START SWITCH ASSEMBLY 
    1. Inspect the clutch start switch assembly (Refer to INSPECTION [08/2015 - ] ).

    Result: 

    NG 

    REPLACE CLUTCH START SWITCH ASSEMBLY 

    (Refer to REMOVAL [08/2015 - ] )

    Result: 

    OK 

    See step  16

  16. CHECK HARNESS AND CONNECTOR (IGNITION SWITCH - CLUTCH START SWITCH ASSEMBLY - CLUTCH START CANCEL SWITCH ASSEMBLY) 
    1. Disconnect the I7 ignition or starter switch assembly connector.
    2. Disconnect the C8 clutch start cancel switch assembly connector.
    3. Disconnect the C7 clutch start switch assembly connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      I7-3 (ST1) - C8-1 Always Below 1 Ω
      I7-3 (ST1) - C7-2 (+S) Always Below 1 Ω
      I7-3 (ST1), C8-1 or C7-2 (+S) - Body ground Always 10 kΩ or higher

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  17

  17. CHECK HARNESS AND CONNECTOR (ST RELAY - ECM - CLUTCH START SWITCH ASSEMBLY - CLUTCH START CANCEL SWITCH ASSEMBLY) 
    1. Remove the ST relay from the engine room relay block.
    2. Disconnect the E18 ECM connector.
    3. Disconnect the C8 clutch start switch assembly connector.
    4. Disconnect the C7 clutch start switch assembly connector.
    5. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C8-2 - E18-17 (STA) Always Below 1 Ω
      C7-4 (-S) - E18-17 (STA) Always Below 1 Ω
      E18-17 (STA) - 1 (ST relay holder) Always Below 1 Ω
      1 (ST relay holder), C8-2, E18-17 (STA) or C7-4 (-S) - Body ground Always 10 kΩ or higher

    Result: 

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

    (Refer to PROBLEM SYMPTOMS TABLE [08/2015 - 11/2017] )

    Result: 

    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 and ECT / Data List / 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: 

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

    (Refer to PROBLEM SYMPTOMS TABLE [08/2015 - 11/2017] )

    Result: 

    NG 

    See step  19

  19. CHECK HARNESS AND CONNECTOR (ECM - ST RELAY) 
    1. Remove the ST relay from the engine room relay block.
    2. Disconnect the E18 ECM connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E18-17 (STA) - 1 (ST relay holder) Always Below 1 Ω

    Result: 

    OK 

    REPLACE ECM 

    (Refer to REMOVAL [08/2015 - 11/2017] )

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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