ENTRY AND START SYSTEM (for Start Function) Engine does not Start

DESCRIPTION


  1. ENGINE START SYSTEM OPERATION


    1. When the engine switch is pressed with the brake pedal depressed and the shift lever in P (for A/T) or the clutch pedal depressed (for M/T), the main body ECU determines that it is an engine start request.

    2. The certification ECU (smart key ECU assembly) and other ECUs perform key verification via the LIN communication line. The engine switch indicator light illuminates in green.

    3. The main body ECU activates the IG1 No. 3 relay, ACC relay and integration relay (IG2 relay).

    4. The certification ECU (smart key ECU assembly) outputs a steering unlock signal. The signal is sent to the steering lock ECU via the LIN communication line.

    5. The main body ECU sends an engine start request signal to the ECM.

    6. The main body ECU deactivates the ACC relay until the ECU detects an engine start.

    7. The ECU reactivates the ACC relay and turns off the engine switch indicator light.

      Symbols of Main Body ECU Signals
      SSW1/SSW2 Engine switch on (ACC, IG) signal
      IG1D IG1 No. 3 relay operation signal
      ACCD ACC relay operation signal
      IG2D Integration relay (IG2 relay) operation signal
      STP Stop light switch signal
      P (for A/T) Shift lock signal
      TACH Engine start detection signal
      STSW Starter activation request signal
      ACCR ACC cut request signal
    A015AOCE01

WIRING DIAGRAM

A015AFAE01
A015AFAE02
A015CNHE05

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK ENGINE SWITCH (SWITCH CONDITION)


    1. Check the power source mode change.


      1. When the key is inside the vehicle and the shift lever is in P (for A/T), check that pressing the engine switch causes the power source mode to change as follows:

        OK
        off → on (ACC) → on (IG) → off

    NG

    GO TO ENTRY AND START SYSTEM (FOR START FUNCTION) (POWER SOURCE MODE DOES NOT CHANGE) Click here

    OK

  2. CHECK WHETHER DTC OUTPUT RECURS


    1. Clear the DTCs Click here.

    2. Check whether the trouble recurs 5 seconds after the engine switch is turned on (IG).

    3. Check whether DTCs for the main body ECU or certification ECU (smart key ECU assembly) are output.

      Result
      Result Proceed to
      No DTC output A

      Main body ECU

      Entry and start system (for start function)

      		 B

      Certification ECU (Smart key ECU assembly)

      Steering lock system

      		 C

      Certification ECU (Smart key ECU assembly)

      Engine immobiliser system

      		 D

    B

    GO TO ENTRY AND START SYSTEM (FOR START FUNCTION) (DIAGNOSTIC TROUBLE CODE CHART) Click here

    C

    GO TO STEERING LOCK SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) Click here

    D

    GO TO ENGINE IMMOBILISER SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) Click here

    A

  3. CHECK CRANKING FUNCTION


    1. Check the engine cranking function.


      1. for A/T:

        When there is fuel in the fuel tank, the key is inside the vehicle and the shift lever is in P, check that depressing the brake pedal and pressing the engine switch cranks the engine.

        for M/T:

        When there is fuel in the fuel tank and the key is inside the vehicle, check that depressing the clutch pedal and pressing the engine switch cranks the engine.

        OK
        Engine cranks.

    NG

    READ VALUE USING INTELLIGENT TESTER (PARK/NEUTRAL POSITION SWITCH OR CLUTCH START SWITCH) Click here

    OK

  4. READ VALUE USING INTELLIGENT TESTER (L CODE)


    1. Use the Data List to check if L code certification is functioning properly.

      Entry&Start
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      L Code Check L code certification result/NG or OK

      OK: L code certification result is normal

      NG: L code certification result is abnormal

      		 -
      OK
      OK is displayed on the intelligent tester.

    NG

    REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) Click here

    OK

  5. READ VALUE USING INTELLIGENT TESTER (ENGINE START CONDITION)


    1. Use the Data List to check if the engine start is functioning properly.

      Entry&Start
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Engine Start Condition Engine start condition by certification ECU (smart key ECU assembly)/OK or NG

      OK: Engine start is permitted

      NG: Engine start is prohibited

      		 -
      OK
      OK is displayed on the intelligent tester.

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Click here

    OK

  6. READ VALUE USING INTELLIGENT TESTER (S CODE)


    1. Use the Data List to check if S code certification is functioning properly.

      Entry&Start
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      S Code Check S code certification result/NG or OK

      OK: S code certification result is normal

      NG: S code certification result is abnormal

      		 -
      OK
      OK is displayed on the intelligent tester.

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Click here

    OK

  7. REPLACE ID CODE BOX (IMMOBILISER CODE ECU)


    1. Replace the ID code box (immobiliser code ECU).

    2. Register the recognition code (ECU code).

    3. Check that the engine starts.

      Result
      Result Proceed to
      Engine starts A
      Engine does not start (for 1GR-FE) B
      Engine does not start (for 1UR-FE) C
      Engine does not start (for 3UR-FE) D
      Engine does not start (for 1VD-FTV) E

    B

    REPLACE ECM Click here

    C

    REPLACE ECM Click here

    D

    REPLACE ECM Click here

    E

    REPLACE ECM Click here

    A

    END

  8. READ VALUE USING INTELLIGENT TESTER (PARK/NEUTRAL POSITION SWITCH OR CLUTCH START SWITCH)


    1. Use the Data List to check if the park/neutral position switch (for A/T) or clutch start switch (for M/T) is functioning properly.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Neutral SW/ Clutch SW Park/neutral position switch (A/T), clutch start switch (M/T)/ON or OFF

      ON: Shift lever in P or N (A/T), clutch pedal depressed (M/T)

      OFF: Shift lever not in P or N (A/T), clutch pedal released (M/T)

      		 -
      Result
      Result Proceed to

      for A/T:

      ON (shift lever in P or N) and OFF (shift lever not in P or N) displayed on the intelligent tester.

      		 A

      for M/T:

      ON (clutch pedal depressed) and OFF (clutch pedal released) displayed on the intelligent tester.

      		 B

      for A/T:

      ON (shift lever in P or N) and OFF (shift lever not in P or N) not displayed on the intelligent tester.

      for M/T:

      ON (clutch pedal depressed) and OFF (clutch pedal released) not displayed on the intelligent tester.

      		 C

    B

    CHECK STEERING LOCK Click here

    C

    INSPECT STARTER RELAY (ST) Click here

    A

  9. READ VALUE USING INTELLIGENT TESTER (SHIFT LOCK CONTROL ECU)


    1. Use the Data List to check if the shift position signal is functioning properly.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Shift P Signal Shift P position signal/ON or OFF

      ON: Shift lever in P

      OFF: Shift lever not in P

      		 -
      OK
      ON (shift lever in P) and OFF (shift lever not in P) are displayed on the intelligent tester.

    NG

    CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - SHIFT LOCK CONTROL ECU AND BODY GROUND) Click here

    OK

  10. READ VALUE USING INTELLIGENT TESTER (STOP LIGHT SWITCH)


    1. Use the Data List to check if the stop light switch is functioning properly.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Stop Light SW Stop light switch/ON or OFF

      ON: Brake pedal is depressed

      OFF: Brake pedal is released

      		 -
      OK
      ON (brake pedal is depressed) and OFF (brake pedal is released) are displayed on the intelligent tester.

    NG

    INSPECT FUSE (STOP) Click here

    OK

  11. CHECK STEERING LOCK


    1. Check if the steering lock is released when turning the engine switch on (ACC).

      OK
      The steering lock is released.

    NG

    GO TO STEERING LOCK SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    OK

  12. CHECK MAIN BODY ECU

    A015CLPE02

    1. Measure the voltage according to the value(s) in the table below.

      Tech Tips

      The voltage is generated at terminal STSW for 0.3 seconds when the engine cranks.

      Standard Voltage
      Tester Connection Condition Specified Condition
      E4-4 (STSW) - Body ground

      for A/T:

      Brake pedal depressed, engine switch depressed

      for M/T:

      Clutch pedal depressed, engine switch depressed

      		 11 to 14 V
      Result
      Result Proceed to
      Outside specified range A
      Within specified range (for 1GR-FE) B
      Within specified range (for 1UR-FE) C
      Within specified range (for 3UR-FE) D
      Within specified range (for 1VD-FTV) E

    B

    REPLACE ECM Click here

    C

    REPLACE ECM Click here

    D

    REPLACE ECM Click here

    E

    REPLACE ECM Click here

    A

    REPLACE MAIN BODY ECU

  13. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - SHIFT LOCK CONTROL ECU AND BODY GROUND)

    A015AAKE02

    1. Disconnect the E4 main body ECU connector.

    2. Disconnect the E51 shift lock control ECU connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      E4-2 (P) - E51-11 (P2) Always Below 1 Ω
      E51-3 (E) - Body ground Always Below 1 Ω
      E4-2 (P) or E51-11 (P2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  14. INSPECT SHIFT LOCK CONTROL ECU


    1. A0156GWE05
      A0158UDE01

      Check the signal waveform according to the condition(s) in the table below.

      Reference
      Terminal No. (Symbol) Tool Setting Condition
      E51-11 (P2) - E51-3 (E) 2 V/DIV., 20 msec./DIV. Shift lever in P
      OK
      The waveform is similar to that shown in the illustration.
      Result
      Result Proceed to
      OK A
      NG for 1GR-FE B
      for 1VD-FTV, 3UR-FE, 1UR-FE C

    B

    REPLACE SHIFT LOCK CONTROL ECU Click here

    C

    REPLACE SHIFT LOCK CONTROL ECU Click here

    A

    REPLACE MAIN BODY ECU

  15. INSPECT STARTER RELAY (ST)


    1. A015BM6E01

      expect GRJ200L-GNANKC, URJ202L-GNTEKC:


      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
        3 - 5 Battery voltage not applied to terminals 1 and 2 10 kΩ or higher
        3 - 5 Battery voltage applied to terminals 1 and 2 Below 1 Ω
    2. A015APZE26

      for GRJ200L-GNANKC, URJ202L-GNTEKC:


      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
        3 - 5 Battery voltage not applied to terminals 1 and 2 10 kΩ or higher
        3 - 5 Battery voltage applied to terminals 1 and 2 Below 1 Ω
        Result
        Result Proceed to
        Within specified range (for A/T) A
        Within specified range (for M/T) B
        Outside specified range C

    B

    INSPECT CLUTCH START SWITCH Click here

    C

    REPLACE STARTER RELAY

    A

  16. INSPECT PARK/NEUTRAL POSITION SWITCH


    1. A0155IOE12

      Disconnect the C24 park/neutral position switch connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      4 (B) - 5 (L) P Below 1 Ω
      4 (B) - 5 (L) N Below 1 Ω
      4 (B) - 5 (L) Not in P or N 10 kΩ or higher
      Result
      Result Proceed to
      Outside specified range (for A750F) A
      Outside specified range (for AB60F) B
      Within specified range C

    B

    REPLACE PARK/NEUTRAL POSITION SWITCH Click here

    C

    CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - PARK/NEUTRAL POSITION SWITCH OR CLUTCH START SWITCH AND BODY GROUND) Click here

    A

    REPLACE PARK/NEUTRAL POSITION SWITCH Click here

  17. INSPECT CLUTCH START SWITCH


    1. A015D5PE03

      Disconnect the A49 (for LHD) or e1 (for RHD) clutch start switch connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 Clutch start switch pin pushed Below 1 Ω
      1 - 2 Clutch start switch pin not pushed 10 kΩ or higher

    NG

    REPLACE CLUTCH START SWITCH Click here

    OK

  18. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - PARK/NEUTRAL POSITION SWITCH OR CLUTCH START SWITCH AND BODY GROUND)

    A0158HBE02

    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (for A/T)
      Tester Connection Condition Specified Condition
      E1-8 (STR) - C24-4 (B) Always Below 1 Ω
      E1-8 (STR) or C24-4 (B) - Body ground Always 10 kΩ or higher
      Standard Resistance (for M/T)
      Tester Connection Condition Specified Condition

      for LHD:

      E1-8 (STR) - A49-1

      		 Always Below 1 Ω

      for LHD:

      E1-8 (STR) or A49-1 - Body ground

      		 Always 10 kΩ or higher

      for RHD:

      E1-8 (STR) - e1-1

      		 Always Below 1 Ω

      for RHD:

      E1-8 (STR) or e1-1 - Body ground

      		 Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  19. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH OR CLUTCH START SWITCH - STARTER RELAY AND BODY GROUND)

    A0159CFE01

    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (for A/T)
      Tester Connection Condition Specified Condition

      C24-5 (L) - Relay block ST relay terminal 1*1

      C24-5 (L) - Relay block ST relay terminal 2*2

      		 Always Below 1 Ω

      C24-5 (L) or Relay block ST relay terminal 1 - Body ground*1

      C24-5 (L) or Relay block ST relay terminal 2 - Body ground*2

      		 Always 10 kΩ or higher

      Relay block ST relay terminal 2 - Body ground*1

      Relay block ST relay terminal 1- Body ground*2

      		 Always Below 1 Ω

      Tech Tips


      • *1: for GRJ200L-GNANKC, URJ202L-GNTEKC

      • *2: except GRJ200L-GNANKC, URJ202L-GNTEKC

      Standard Resistance (for M/T)
      Tester Connection Condition Specified Condition

      for LHD:

      A49-2 - Relay block ST relay terminal 1*1

      A49-2 - Relay block ST relay terminal 2*2

      		 Always Below 1 Ω

      for LHD:

      A49-2 or Relay block ST relay terminal 1 - Body ground*1

      A49-2 or Relay block ST relay terminal 2 - Body ground*2

      		 Always 10 kΩ or higher

      for RHD:

      e1-2 - Relay block ST relay terminal 1*1

      e1-2 - Relay block ST relay terminal 2*2

      		 Always Below 1 Ω

      for RHD:

      e1-2 or Relay block ST relay terminal 1 - Body ground*1

      e1-2 or Relay block ST relay terminal 2 - Body ground*2

      		 Always 10 kΩ or higher

      Relay block ST relay terminal 2 - Body ground*1

      Relay block ST relay terminal 1 - Body ground*2

      		 Always Below 1 Ω

      Tech Tips


      • *1: for GRJ200L-GNANKC, URJ202L-GNTEKC

      • *2: except GRJ200L-GNANKC, URJ202L-GNTEKC


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU

  20. INSPECT FUSE (STOP)


    1. Remove the STOP fuse 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
      STOP fuse Always Below 1 Ω

    NG

    REPLACE FUSE

    OK

  21. INSPECT STOP LIGHT SWITCH

    A015DOQE01

    1. Disconnect the A30 stop light switch connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1 - 2 Stop light switch pin not pushed Below 1 Ω
      3 - 4 Stop light switch pin pushed Below 1 Ω
      1 - 2 Stop light switch pin pushed 10 kΩ or higher
      3 - 4 Stop light switch pin not pushed 10 kΩ or higher

    NG

    REPLACE STOP LIGHT SWITCH Click here

    OK

  22. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - STOP LIGHT SWITCH AND BODY GROUND)

    A0156H6E02

    1. Disconnect the 2B main body ECU connector.

    2. Disconnect the A30 stop light switch connector.

    3. Measure the voltage and resistance according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      A30-2 - Body ground Always 11 to 14 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      2B-22 (STP) - A30-1 Always Below 1 Ω
      2B-22 (STP) or A30-1 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU

  23. REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)


    1. Replace the steering lock actuator assembly (steering lock ECU).

      Tech Tips


      • For Power tilt and telescopic, use the following procedures Click here

      • For Manual tilt and telescopic, use the following procedures Click here

    2. Register the recognition code (ECU code).

    3. Check that the engine starts.

      OK
      Engine starts.

    NG

    REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

    OK

    END

  24. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. Replace the certification ECU (smart key ECU assembly).

    2. Register the recognition code (ECU code).

    3. Check that the engine starts.

      OK
      Engine starts.

    NG

    REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

    OK

    END