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Home >> Toyota >> 2009 >> Highlander Base, 3.5 S, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (2GR-FE) - System And Component Testing, 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 USING TECHSTREAM (STA SIGNAL) 
    1. Connect the 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 CONDITION CHART

      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.
      Fig 1: ST Relay Circuit
      G04942983Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      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.

      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) 

      TESTER CONNECTION SPECIFIED CONDITION CHART

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

      Standard resistance (check for short) 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      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.

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

      Fig 2: Identifying ST Relay And Park/Neutral Position Switch Connector Terminals
      G05413938Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      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 CHART

      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.

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

      Fig 3: Identifying ST Relay
      G05413924Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      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 CHART

      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.

      NG: Go to step  9

      Fig 4: Identifying ST Relay
      G05413924Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to next step 

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

      NG: REPLACE STARTER ASSEMBLY  (See STARTER )

      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) 

      TESTER CONNECTION SPECIFIED CONDITION CHART

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

      Standard resistance (check for short) 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      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.

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

      Fig 5: Identifying ST Relay And Starter Connector Terminals
      G05413928Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      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 CHART

      Tester Connection Condition Specified Condition
      Fusible link Always Below 1 Ω
    3. Reinstall the fusible link.

      NG: REPLACE FUSIBLE LINK 

      Fig 6: Identifying Fusible Link
      G05413942Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      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 CHART

      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 B2 And B3 Connector Terminals
      G05413943Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result 

      RESULT CHART

      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.
      Fig 8: Identifying Park/Neutral Position Switch Connector Terminals
      G05413944Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      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 CHART

      Result Proceed To
      OK A
      NG (with U151E)) B
      NG (with U151F) C
    4. Reconnect the park/neutral position switch connector.

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

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

      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) 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      B3-11 (STA) - B5-5 Always Below 1 Ω

      Standard resistance (check for short) 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      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.

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

      Fig 9: Identifying Park/Neutral Position Switch And ECM Connector Terminals
      G05413945Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      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.
      Fig 10: ST CUT Relay Circuit
      G04942983Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      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.

      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 CHART

      Tester Connection Switch Condition Specified Condition
      2 - Body ground Ignition switch on (IG) 9 to 14 V
    4. Reinstall the ST CUT relay.

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

      Fig 11: Identifying ST CUT Relay
      G05413947Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      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) 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      B3-12 (STSW) - D10-4 (STSW) Always Below 1 Ω

      Standard resistance (check for short) 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      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.

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - MAIN BODY ECU) 

      Fig 12: Identifying Main Body ECU And ECM Connector Terminals
      G05413948Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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