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Home >> Toyota >> 2011 >> Highlander Hybrid Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 42 (Engine Control System (1AR-FE) (Diagnostic Codes (P1604 - U0101) & Circuit Tests)) >> SFI System >> Starter Signal Circuit >> Procedure

Starter Signal Circuit: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. 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 / All Data / Starter Signal.
    5. Read the value.

      OK

      Ignition Switch Position Starter Signal
      ON Close (Starter signal OFF)
      START Open (Starter signal ON)

    NG → See step   2 

    OK → See step   8 

  2. INSPECT RELAY (ST RELAY VOLTAGE) 
    1. Remove the ST relay from the engine room relay block.
      Fig 1: Identifying ST Relay
      GTY184062Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      ST relay terminal 2 - Body ground Ignition switch START position 11 to 14 V
    3. Reinstall the ST relay.

    NG → See step   3 

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

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

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      B5-9 - ST relay terminal 2 Always Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      B5-9 or ST relay terminal 2 - Body ground Always 10 kΩ or higher
    4. Reconnect the park/neutral position switch assembly connector.
    5. Reinstall the ST relay.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  4. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY 
    1. Inspect the park/neutral position switch assembly, refer to INSPECTION .

    NG → See step   9 

    OK: Go to next step 

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

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      D24-3 (ST1) - B5-4 Always Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      D24-3 (ST1) or B5-4 - Body ground Always 10 kΩ or higher
    4. Reconnect the ignition switch assembly connector.
    5. Reconnect the park/neutral position switch assembly connector.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  6. CHECK HARNESS AND CONNECTOR (IGNITION SWITCH ASSEMBLY - ECM) 
    1. Disconnect the ignition switch assembly connector.
    2. Disconnect the ECM connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      D24-3 (ST1) - B51-24 (NSW) Always Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      D24-3 (ST1) or B51-24 (NSW) - Body ground Always 10 kΩ or higher
    4. Reconnect the ignition switch assembly connector.
    5. Reconnect the ECM connector.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  7. INSPECT IGNITION SWITCH ASSEMBLY 
    1. Inspect the ignition switch assembly, refer to INSPECTION .

    NG → See step   10 

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

  8. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE 
  9. REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY. Refer to  REMOVAL 
  10. REPLACE IGNITION SWITCH ASSEMBLY. Refer to  REMOVAL 
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