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Home >> Toyota >> 2008 >> Highlander Base, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (2GR-FE Except Hybrid) - System Testing, On-Vehicle Inspection, Removal, Inspection And Installation >> Starter Signal Circuit >> Inspection Procedure

Inspection Procedure

HINT:

This table is based on the premise that the engine can crank normally. If the engine cannot crank normally, proceed to PROBLEM SYMPTOMS TABLE .

  1. INSPECT TERMINAL VOLTAGE (ST RELAY TERMINAL) 
    1. Remove the ST relay from the engine room relay block.
    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION TABLE

      Tester Connection Condition Specified Condition
      ST relay terminal 1 - Body ground Engine cranking 9 to 14 V

      HINT:

      The engine does not crank because the relay is not installed.

    3. Reinstall the ST relay.
      Fig 1: Identifying ST Relay Terminals
      G05413924Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG:  Go to step  8

    OK: Go to next step 

  2. INSPECT ST RELAY 
    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 SPECIFIED CONDITION TABLE

      Tester Connection Condition Specified Condition
      3 - 5 When no battery voltage applied terminals 1 and 2 10 kΩ or higher
      3 - 5 When the battery voltage applied terminals 1 and 2 Below 1 Ω
    3. Reinstall the ST relay.
      Fig 2: Identifying ST Relay Circuit
      G04942976Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE ST RELAY 

    OK: Go to next step 

  3. 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 SPECIFIED CONDITION TABLE

      Tester Connection Condition Specified Condition
      ST relay terminal 2 - Body ground Always Below 1 Ω
    3. Reinstall the ST relay.
      Fig 3: Identifying ST Relay Terminals
      G05413924Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (ST RELAY - BODY GROUND) 

    OK: Go to next step 

  4. INSPECT TERMINAL VOLTAGE (ST RELAY TERMINAL) 
    1. Remove the ST relay from the engine room relay block.
    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION TABLE

      Tester Connection Condition Specified Condition
      ST relay terminal 5 - Body ground Cranking 9 to 14 V
    3. Reinstall the ST relay.
      Fig 4: Identifying ST Relay Terminals
      G05413924Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG:  Go to step  6

    OK: Go to next step 

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

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION TABLE

      Tester Connection Condition Specified Condition
      ST relay terminal 3 - B12-1 Always Below 1 Ω
    4. Reconnect the starter connector.
    5. Reinstall the ST relay.
      6. Fig 5: Identifying Harness & Connector (ST Relay - Starter)
      G05413928Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (ST RELAY - STARTER) 

    OK: REPAIR OR REPLACE STARTER ASSEMBLY 

  6. CHECK HARNESS AND CONNECTOR (ST RELAY - IGNITION SWITCH ASSEMBLY) 
    1. Remove the ST relay from the engine room relay block.
    2. Disconnect the ignition switch connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance (Check for open) 

      STANDARD RESISTANCE (CHECK FOR OPEN)

      Tester Connection Condition Specified Condition
      ST relay terminal 5 - D24-7 (ST2) Always Below 1 Ω

      Standard resistance (Check for short) 

      STANDARD RESISTANCE (CHECK FOR SHORT)

      Tester Connection Condition Specified Condition
      ST relay terminal 5 or D24-7 (ST2) - Body ground Always 10 kΩ or higher
    4. Reinstall the ST relay.
    5. Reconnect the ignition switch connector.
      6. Fig 6: Identifying Harness & Connector (ST Relay - Ignition Switch Assembly)
      G05413929Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (ST RELAY - IGNITION SWITCH ASSEMBLY) 

    OK: Go to next step 

  7. INSPECT IGNITION SWITCH ASSEMBLY 
    1. Disconnect the ignition switch assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION TABLE

      Tester Connection Ignition Switch Position Specified Condition
      All terminals LOCK 10 kΩ or higher
      D24-4 (AM1) - D24-3 (ST1) START Below 1 Ω
    3. Reconnect the ignition switch assembly connector.
      Fig 7: Identifying Ignition Switch Assembly Connector Terminals
      G05413930Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE IGNITION SWITCH ASSEMBLY  (See REMOVAL )

    OK: Go to next step 

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

      Standard resistance (Check for open) 

      STANDARD RESISTANCE (CHECK FOR OPEN)

      Tester Connection Condition Specified Condition
      ST relay terminal 2 - B5-5 Always Below 1 Ω

      Standard resistance (Check for short) 

      STANDARD RESISTANCE (CHECK FOR SHORT)

      Tester Connection Condition Specified Condition
      ST relay terminal 2 or B5-5 - Body ground Always 10 kΩ or higher
    4. Reinstall the ST relay.
    5. Reconnect the park/neutral position switch connector.
      6. Fig 8: Identifying Harness & Connector (ST Relay - Park/Neutral Position Switch)
      G05413931Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (ST RELAY - PARK/NEUTRAL POSITION SWITCH) 

    OK: Go to next step 

  9. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY 
    1. Inspect the park/neutral position switch assembly (U151E: See INSPECTION , U151F: See ON-VEHICLE INSPECTION ).

      Result: 

      RESULT TABLE

      Result Proceed To
      OK A
      NG (with U151E) B
      NG (with U151F) C

    B: REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY  (See REMOVAL )

    C: REPLACE PARK/NEUTRAL POSITION SWITCH  (See REMOVAL )

    A: Go to next step 

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

      Standard resistance (Check for open) 

      STANDARD RESISTANCE (CHECK FOR OPEN)

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

      Standard resistance (Check for short) 

      STANDARD RESISTANCE (CHECK FOR SHORT)

      Tester Connection Condition Specified Condition
      B5-4 or D24-3 (ST1) - Body ground Always 10 kΩ or higher
    4. Reconnect the park/neutral position switch connector.
    5. Reconnect the ignition switch assembly connector.
      6. Fig 9: Identifying Harness & Connector (Park/Neutral Position Switch - Ignition Switch Assembly)
      G05413932Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (PARK/NEUTRAL POSITION SWITCH - IGNITION SWITCH ASSEMBLY) 

    OK: Go to next step 

  11. INSPECT IGNITION SWITCH ASSEMBLY 
    1. Disconnect the ignition switch assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION TABLE

      Tester Connection Ignition Switch Position Specified Condition
      All terminals LOCK 10 kΩ or higher
      D24-4 (AM1) - D24-3 (ST1) START Below 1 Ω
    3. Reconnect the ignition switch assembly connector.
      Fig 10: Identifying Ignition Switch Assembly Connector Terminals
      G05413930Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE IGNITION SWITCH ASSEMBLY  (See REMOVAL )

    OK: Go to next step 

  12. INSPECT FUSE (AM1 FUSE) 
    1. Remove the AM1 fuse from the instrument panel junction block.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION TABLE

      Tester Connection Condition Specified Condition
      AM1 fuse Always Below 1 Ω
    3. Reinstall the AM1 fuse.
      Fig 11: Identifying AM1 Fuse
      G05413934Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE FUSE (AM1 FUSE) 

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

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