STOP AND START SYSTEM(for V35A-FTS) Starter Signal Circuit

DESCRIPTION

By using the starter delay circuit, the engine stop and start ECU can activate the ST NO. 2 relay (for starter motor operation) after activating the ST relay (for starter pinion operation) to operate the starter assembly.

WIRING DIAGRAM

B0069O4E01
B006AACE01

CAUTION / NOTICE / HINT

Note


  • Before replacing the engine stop and start ECU, read the number of starter operations and write it into a new engine stop and start ECU.

    Click here

  • After replacing the engine stop and start ECU or air conditioning amplifier assembly, reset and perform learning of the air conditioning information in the engine stop and start ECU.

    Click here

  • After replacing the engine stop and start ECU or airbag ECU assembly, clear and calibrate the deceleration sensor zero point in the engine stop and start ECU.

    Click here

  • After replacing the starter assembly, perform initialization of the number of starter operations stored in the engine stop and start ECU.

    Click here

  • Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE


  1. CHECK CRANKING


    1. Turn the engine switch on (START) and check that the engine cranks.

      Result
      Result Proceed to
      Engine cranks A
      Engine does not crank B

    B

    PERFORM ACTIVE TEST USING GTS (STARTER (HOOD CLOSE)) Click here

    A

  2. PERFORM ACTIVE TEST USING GTS (STARTER (HOOD CLOSE))


    1. Check that the engine hood is closed.

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the GTS on.

    5. Enter the following menus: Powertrain / Stop and Start / Active Test / Starter(Hood Close).


      Powertrain > Stop and Start > Active Test
      Tester Display
      Starter(Hood Close)

    6. Check whether the engine cranks while the Active Test "Starter(Hood Close)" is being performed.

      Note

      The Active Test "Starter(Hood Close)" is stopped automatically 3 seconds after the starter assembly begins operating.

      Standard
      Engine cranks
      Result
      Proceed to
      OK
      NG

    OK

    GO TO DTC P160300 (CONFIRM CAUSE OF ENGINE STALL) Click here

    NG

  3. CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU POWER SOURCE CIRCUIT)


    1. Disconnect the A33, A34 and G84 engine stop and start ECU connectors.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A33-1 (BIN2) - Body ground Always 9.5 to 14 V
      A33-3 (BIN1) - Body ground Always 9.5 to 14 V

    3. Turn the engine switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A34-1 (+B) - Body ground Engine switch on (IG) 9.5 to 14 V
      G84-18 (IG2) - Body ground Engine switch on (IG) 9.5 to 14 V
      G84-21 (IG1) - Body ground Engine switch on (IG) 9.5 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - BODY GROUND)


    1. Disconnect the A33 and A34 engine stop and start ECU connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A33-2 (GND2) - Body ground Always Below 1 Ω
      A33-8 (GND1) - Body ground Always Below 1 Ω
      A34-6 (DGND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ENGINE STOP AND START ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. PERFORM ACTIVE TEST USING GTS (STARTER (HOOD CLOSE))


    1. Check that the engine hood is closed.

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the GTS on.

    5. Enter the following menus: Powertrain / Stop and Start / Active Test / Starter(Hood Close).


      Powertrain > Stop and Start > Active Test
      Tester Display
      Starter(Hood Close)

    6. Check whether the engine cranks while the Active Test "Starter(Hood Close)" is being performed.

      Note

      The Active Test "Starter(Hood Close)" is stopped automatically 3 seconds after the starter assembly begins operating.

      Standard
      Engine cranks
      Result
      Result Proceed to
      Engine cranks A
      Engine does not crank B

    B

    CHECK ENGINE STOP AND START ECU (STA, STA2 SIGNAL) Click here

    A

  6. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ST NO. 1 RELAY)


    1. Disconnect the A22 certification ECU (smart key ECU assembly) connector.

    2. Remove the ST NO. 1 relay from No. 1 engine room relay block and junction block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A22-9 (STAR) - ST NO. 1 relay terminal 2 Always Below 1 Ω
      A22-20 (STA) - ST NO. 1 relay terminal 2 Always Below 1 Ω
      A22-9 (STAR) - Body ground Always 10 kΩ or higher
      A22-20 (STA) - Body ground Always 10 kΩ or higher
      ST NO. 1 relay terminal 2 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ENGINE STOP AND START ECU)


    1. Disconnect the A22 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the A34 engine stop and start ECU connector.

    3. Remove the ST NO. 1 relay from No. 1 engine room relay block and junction block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A22-9 (STAR) - A34-21 (STA) Always Below 1 Ω
      A22-20 (STA) - A34-21 (STA) Always Below 1 Ω
      A22-9 (STAR) - Body ground Always 10 kΩ or higher
      A22-20 (STA) - Body ground Always 10 kΩ or higher
      A34-21 (STA) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (STAR SIGNAL)


    1. Disconnect the A34 engine stop and start ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A34-21 (STA) - Body ground Engine started using engine switch (engine switch turned on (START)) 9.5 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

    GO TO ENTRY AND START SYSTEM Click here

  9. CHECK ENGINE STOP AND START ECU (STA, STA2 SIGNAL)


    1. Connect an oscilloscope to terminals A34-21 (STA), A34-23 (STA2) and A34-6 (DGND).

      B006CUBC83
      *a

      Component with harness connected

      (Engine Stop and Start ECU)

      		 - -
    2. B006CUAE09
      *1 (ST Relay)
      *2 (ST NO. 2 Relay)
      *3 0.03 to 0.06 seconds

      Check the waveform immediately after turning the engine switch on (START).

      Item Condition
      Tester Connection

      A34-21 (STA) - A34-6 (DGND)

      A34-23 (STA2) - A34-6 (DGND)
      Condition Engine started by engine switch operation
      Result
      Result Proceed to
      Delay between ST NO. 1 relay turning on and ST NO. 2 relay turning on: between 0.03 and 0.06 seconds A
      Delay between ST NO. 1 relay turning on and ST NO. 2 relay turning on: not between 0.03 and 0.06 seconds B
      ST NO. 1 relay turns on and ST NO. 2 relay does not turn on C
      ST NO. 1 relay and ST NO. 2 relay do not turn on D

      Note

      After replacing the engine stop and start ECU, make sure that the drive plate and ring gear sub-assembly and starter pinion gear are not excessively worn. A malfunction in the delay circuit may cause the drive plate and ring gear sub-assembly or starter pinion gear to be worn or damaged.


    B

    REPLACE ENGINE STOP AND START ECU Click here

    C

    CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU POWER SOURCE CIRCUIT) Click here

    D

    GO TO STEP 14 Click here

    A

  10. INSPECT RELAY (ST NO.1, ST NO. 2 RELAY)


    1. Inspect the ST NO. 1 relay.

      Click here

    2. Inspect the ST NO. 2 relay.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE RELAY (ST NO. 1, ST NO. 2 RELAY)

    OK

  11. CHECK HARNESS AND CONNECTOR (ST NO. 1 RELAY - BATTERY)

    B006AZDC01
    *A for LHD *B for RHD
    *1 No. 1 Engine Room Relay Block and Junction Block *a ST NO. 1 relay Terminal

    1. Remove the ST NO. 1 relay from No. 1 engine room relay block and junction block.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      ST NO. 1 relay terminal 5 - Body ground Always 9.5 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  12. CHECK HARNESS AND CONNECTOR (ST NO. 2 RELAY - BATTERY)

    B006EAWC01
    *1 No. 2 Engine Room Relay Block
    *a ST NO. 2 relay Terminal

    1. Remove the ST NO. 2 relay from No. 2 engine room relay block.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      ST NO. 2 relay terminal 5 - Body ground Always 9.5 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  13. CHECK HARNESS AND CONNECTOR (ST NO. 1, ST NO. 2 RELAY - STARTER ASSEMBLY)


    1. Remove the ST NO. 1 relay from No. 1 engine room relay block and junction block.

    2. Remove the ST NO. 2 relay from No. 2 engine room relay block.

    3. Disconnect the D8*1, D46*1 or D7*2, D47*2 starter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      ST NO. 1 relay terminal 3 - D8-2 (SL1)*1 Always Below 1 Ω
      ST NO. 1 relay terminal 3 - D7-2 (SL1)*2 Always Below 1 Ω
      ST NO. 2 relay terminal 3 - D8-1 (SL2)*1 Always Below 1 Ω
      ST NO. 2 relay terminal 3 - D7-1 (SL2)*2 Always Below 1 Ω
      ST NO. 2 relay terminal 3 - D46-1 (ST)*1 Always Below 1 Ω
      ST NO. 2 relay terminal 3 - D47-1 (ST)*2 Always Below 1 Ω

      • *1: for 2WD

      • *2: for AWD

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  14. CHECK HARNESS AND CONNECTOR (ST NO. 1 RELAY - BODY GROUND)


    1. Remove the ST NO. 1 relay from No. 1 engine room relay block and junction block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      ST NO. 1 relay terminal 1 - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  15. CHECK HARNESS AND CONNECTOR (ST NO. 2 RELAY - BODY GROUND)


    1. Remove the ST NO. 2 relay from No. 2 engine room relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      ST NO. 2 relay terminal 1 - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  16. CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - ST NO. 1 RELAY)


    1. Disconnect the A34 engine stop and start ECU connector.

    2. Remove the ST NO. 1 relay from No. 1 engine room relay block and junction block.

    3. Disconnect the A22 certification ECU (smart key ECU assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A34-21 (STA) - ST NO. 1 relay terminal 2 Always Below 1 Ω
      A34-21 (STA) - Body ground Always 10 kΩ or higher
      ST NO. 1 relay terminal 2 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  17. CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - ST NO. 2 RELAY)


    1. Disconnect the A34 engine stop and start ECU connector.

    2. Remove the ST NO. 2 relay from No. 2 engine room relay block.

    3. Disconnect the A56 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A34-23 (STA2) - ST NO. 2 relay terminal 2 Always Below 1 Ω
      A34-23 (STA2) - Body ground Always 10 kΩ or higher
      ST NO. 2 relay terminal 2 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  18. CHECK STARTER SIGNAL (OUTPUT WAVEFORM)


    1. Connect the positive (+) lead of an oscilloscope to the positive (+) battery terminal and the negative (-) lead to the negative (-) battery terminal.

    2. While cranking the engine, count the number of times the waveform drops.

      B006EP8E02
      Standard
      Waveform drops 2 times
      Result
      Number of Times Waveform Dropped Proceed to
      0 times A
      2 times B

    B

    INSPECT STARTER ASSEMBLY Click here

    A

  19. INSPECT STARTER INRUSH CURRENT REDUCTION RELAY


    1. B006D44C02
      *1 Starter Assembly
      *a B Terminal
      *b M Terminal

      Disconnect the cable from the negative (-) battery terminal.

    2. Disconnect terminals B and M of the starter inrush current reduction relay.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B Terminal - M Terminal Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    INSPECT STARTER ASSEMBLY (M TERMINAL) Click here

    OK

  20. INSPECT STARTER ASSEMBLY (C TERMINAL)


    1. Disconnect the cable from the negative (-) battery terminal.

    2. B006BI4C02
      *1 Starter Assembly
      *a Inspect Part
      *b C Terminal
      *c B Terminal

      Disconnect terminal B of the starter inrush current reduction relay.

    3. Disconnect terminal C of the starter assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C Terminal - B Terminal Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE STARTER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  21. INSPECT STARTER ASSEMBLY (M TERMINAL)


    1. Disconnect the cable from the negative (-) battery terminal.

    2. B006G9TC02
      *1 Starter Assembly
      *a Inspect Part
      *b M Terminal

      Disconnect terminal M of the starter inrush current reduction relay.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      M Terminal - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE STARTER INRUSH CURRENT REDUCTION RELAY Click here

    NG

    REPLACE STARTER ASSEMBLY Click here

  22. INSPECT STARTER ASSEMBLY


    1. Inspect the starter assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

    REPLACE STARTER ASSEMBLY Click here

  23. CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU POWER SOURCE CIRCUIT)


    1. Disconnect the A33, A34 and G84 engine stop and start ECU connectors.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A33-1 (BIN2) - Body ground Always 9.5 to 14 V
      A33-3 (BIN1) - Body ground Always 9.5 to 14 V

    3. Turn the engine switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A34-1 (+B) - Body ground Engine switch on (IG) 9.5 to 14 V
      G84-18 (IG2) - Body ground Engine switch on (IG) 9.5 to 14 V
      G84-21 (IG1) - Body ground Engine switch on (IG) 9.5 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  24. CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - BODY GROUND)


    1. Disconnect the A33 and A34 engine stop and start ECU connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A33-2 (GND2) - Body ground Always Below 1 Ω
      A33-8 (GND1) - Body ground Always Below 1 Ω
      A34-6 (DGND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ENGINE STOP AND START ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR