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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 >> Cranking Holding Function Circuit >> Inspection Procedure
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Inspection Procedure

  1. CHECK CRANKING 
    1. When starting the engine, check whether the starter motor starts.

      OK: 

      Engine is cranking. 

    NG: Go to step   2 

    OK: CHECK FOR INTERMITTENT PROBLEMS  (See CHECK FOR INTERMITTENT PROBLEMS )

  2. READ VALUE OF TECHSTREAM (STA SIGNAL) 
    1. Connect Techstream to the DLC3.
    2. Turn the ignition switch on (IG).
    3. Turn the tester on.
    4. Select the following menu items: Powertrain / Engine and ECT / Data List / Starter Signal.
    5. Check the result when the ignition switch is turned on (IG) and when the engine is started.

    OK 

    STARTER SIGNAL TABLE

    Display (Starter Signal) Condition
    OFF Ignition switch on (IG)
    ON Engine start

    NG:  Go to step  10

    OK: Go to next step 

  3. 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 battery voltage applied terminals 1 and 2 Below 1 Ω
    3. Reinstall the ST relay.
      Fig 1: Identifying ST Relay Circuit
      G04942983Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE ST RELAY 

    OK: Go to next step 

  4. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ST RELAY) 
    1. Disconnect the park/neutral position switch 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) 

      STANDARD RESISTANCE (CHECK FOR OPEN)

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

      Standard resistance (check for short) 

      STANDARD RESISTANCE (CHECK FOR SHORT)

      Tester Connection Condition Specified Condition
      B5-5 or ST relay terminal (2) - Body ground Always 10 kΩ or higher
    4. Reconnect the park/neutral position switch connector.
    5. Reinstall the ST relay.
      6. Fig 2: Identifying Harness & Connector (Park/Neutral Position Switch - ST Relay)
      G05413938Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

    OK: Go to next step 

  5. 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 to the engine room relay block.
      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 

  6. 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 Always 9 to 14 V
    3. Reinstall the ST relay to the engine room relay block.
      Fig 4: Identifying ST Relay Terminals
      G05413924Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG:  Go to step  9

    OK: Go to next step 

  7. INSPECT STARTER ASSEMBLY 
    1. Inspect the starter assembly (See INSPECTION ).

    NG: REPLACE STARTER ASSEMBLY  (See REMOVAL )

    OK: Go to next step 

  8. CHECK HARNESS AND CONNECTOR (ST RELAY - STARTER ASSEMBLY) 
    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 (check for open) 

      STANDARD RESISTANCE (CHECK FOR OPEN)

      Tester Connection Condition Specified Condition
      ST relay terminal (3) - B12-1 Always Below 1 Ω

      Standard resistance (check for short) 

      STANDARD RESISTANCE (CHECK FOR SHORT)

      Tester Connection Condition Specified Condition
      ST relay terminal (3) or B12-1 - Body ground Always 10 kΩ or higher
    4. Reconnect the starter connector.
    5. Reinstall the ST relay.
      Fig 5: Identifying Harness & Connector (ST Relay - Starter Assembly)
      G05413928Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

  9. INSPECT FUSIBLE LINK (ST FUSE) 
    1. Remove the fusible link 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
      Fusible link Always Below 1 Ω
    3. Reinstall the fusible link.
      Fig 6: Identifying Fusible Link
      G05413942Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE FUSIBLE LINK 

    OK: REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - STARTER RELAY) 

  10. CHECK ECM (STAR AND STSW VOLTAGE) 
    1. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION TABLE

      Tester Connection Condition Specified Condition
      B2-8 (STAR) - Body ground Always 9 to 14 V
      B3-12 (STSW) - Body ground Always 9 to 14 V
      Fig 7: Identifying ECM (STAR & STSW Voltage)
      G05413943Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Result 

    RESULT TABLE

    Terminal STAR Terminal STSW Proceed to
    9 to 14 V 9 to 14 V A
    0 V 9 to 14 V B
    0 V 0 V C

    B: REPLACE ECM  (See REMOVAL  )

    C:  Go to step  15

    A: Go to next step 

  11. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY 
    1. Inspect the park/neutral position switch.
    2. Disconnect the park/neutral position switch connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION TABLE

      Shift Position Tester Connection Specified Condition
      P 2 - 6, 4 - 5 Below 1 Ω
      R 1 - 2 Below 1 Ω
      N 2 - 9, 4 - 5 Below 1 Ω
      D 2 - 7 Below 1 Ω
      2 2 - 3 Below 1 Ω
      L 2 - 8 Below 1 Ω

      Result: 

      RESULT TABLE

      Result Proceed To
      OK A
      NG (with U151E) B
      NG (with U151F) C
    4. Reconnect the park/neutral position switch connector.
      Fig 8: Identifying Park/Neutral Position Switch Connector Terminals
      G05413944Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    B: REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY  (See REMOVAL (U151E) )

    C: REPLACE PARK/NEUTRAL POSITION SWITCH  (See REMOVAL (U151F) )

    A: Go to next step 

  12. CHECK HARNESS AND CONNECTOR (ECM - PARK/NEUTRAL POSITION SWITCH) 
    1. Disconnect the ECM connector.
    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
      B3-11 (STA) - B5-5 Always Below 1 Ω

      Standard resistance (check for short) 

      STANDARD RESISTANCE (CHECK FOR SHORT)

      Tester Connection Condition Specified Condition
      B3-11 (STA) or B5-5 - Body ground Always 10 kΩ or higher
    4. Reconnect the ECM connector.
    5. Reconnect the park/neutral position switch connector.
      6. Fig 9: Identifying Harness & Connector (ECM - Park/Neutral Position Switch)
      G05413945Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

    OK: Go to next step 

  13. INSPECT RELAY (ST CUT RELAY) 
    1. Remove the ST CUT 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 battery voltage applied terminals 1 and 2 Below 1 Ω
    3. Reinstall the ST CUT relay.
      Fig 10: Identifying ST CUT Relay Circuit
      G04942983Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE RELAY 

    OK: Go to next step 

  14. INSPECT TERMINAL VOLTAGE (ST CUT RELAY TERMINAL) 
    1. Remove the ST CUT relay from the engine room relay block.
    2. Turn the ignition switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION TABLE

      Tester Connection Switch Condition Specified Condition
      2 - Body ground Ignition switch on (IG) 9 to 14 V
    4. Reinstall the ST CUT relay.
      Fig 11: Identifying ST CUT Relay Terminals
      G05413947Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (ST CUT RELAY - IG2 RELAY) 

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

  15. CHECK HARNESS AND CONNECTOR (ECM - MAIN BODY ECU) 
    1. Disconnect the ECM connector.
    2. Disconnect the main body ECU 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
      B3-12 (STSW) - D10-4 (STSW) Always Below 1 Ω

      Standard resistance (check for short) 

      STANDARD RESISTANCE (CHECK FOR SHORT)

      Tester Connection Condition Specified Condition
      B3-12 (STSW) or D10-4 (STSW) - Body ground Always 10 kΩ or higher
    4. Reconnect the ECM connector.
    5. Reconnect the main body ECU connector.
      6. Fig 12: Identifying Harness & Connector (ECM - Main Body ECU)
      G05413948Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

    OK: CHECK SMART KEY SYSTEM  (See HOW TO PROCEED WITH TROUBLESHOOTING )

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