STOP AND START SYSTEM(for 3ZR-FAE) Starter Signal Circuit

DESCRIPTION

for CVT:

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 NO. 1 relay (for starter pinion operation) to operate the starter assembly.

for Manual Transaxle:

The engine stop and start ECU can activate the ST NO. 1 relay to operate the starter assembly.

WIRING DIAGRAM


  1. for CVT:

    B002A7VE02
    B0029JJE02
    B0029XCE01

  2. for Manual Transaxle:

    B0029L2E01
    B0029D7E01
    B00299QE01

CAUTION / NOTICE / HINT

Note


  • for CVT:

    When replacing the engine stop and start ECU with a new one, make sure to download the previous status (number of starter operations) of the old engine stop and start ECU. After replacing the engine stop and start ECU, turn the ignition switch to ON and wait 20 seconds, then confirm that "OK" is displayed for the Data List item "Oper Prohibition (O/P Air Bleeding)". Then upload the previous status (number of starter operations) to the engine stop and start ECU.

    Click here

  • for Manual Transaxle:

    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 sensor 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

  • for CVT:

    When the starter assembly is replaced, "ST NO. 1 relay" and "ST NO. 2 relay" must be also replaced.

  • for Manual Transaxle:

    When the starter assembly is replaced, "ST NO. 1 relay" must be also replaced.

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

PROCEDURE


  1. CHECK CRANKING


    1. Turn the ignition switch to 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) Click here

    A

  2. PERFORM ACTIVE TEST USING GTS (STARTER)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Stop and Start / Active Test / Starter.


      Powertrain > Stop and Start > Active Test
      Tester Display
      Starter

    5. Check whether the engine cranks while the Active Test "Starter" is being performed.

      Note

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

      Standard
      Engine cranks
      Result
      Proceed to
      OK
      NG

    OK

    GO TO DTC P1603 (CONFIRM CAUSE OF ENGINE STALL) Click here

    NG

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

    B002AEUC17
    *a

    Front view of wire harness connector

    (to Engine Stop and Start ECU)

    		 - -

    1. Disconnect the 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
      A86-1 (BIN2) - Body ground Always 9.5 to 14 V
      A86-3 (BIN1) - Body ground Always 9.5 to 14 V

    3. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A66-1 (+B) - Body ground Ignition switch ON 9.5 to 14 V
      G87-18 (IG2) - Body ground Ignition switch ON 9.5 to 14 V
      G87-21 (IG1) - Body ground Ignition switch ON 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 A86 and A66 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
      A86-2 (GND2) - Body ground Always Below 1 Ω
      A86-8 (GND1) - Body ground Always Below 1 Ω
      A66-6 (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)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Stop and Start / Active Test / Starter.


      Powertrain > Stop and Start > Active Test
      Tester Display
      Starter

    5. Check whether the engine cranks while the Active Test "Starter" is being performed.

      Note

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

      Standard
      Engine cranks
      Result
      Result Proceed to
      Engine cranks (for CVT) A
      Engine does not crank (for CVT) B
      Engine cranks (for Manual Transaxle) C
      Engine does not crank (for Manual Transaxle) D

    B

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

    C

    READ VALUE USING GTS (CLUTCH LOWER SW) Click here

    D

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

    A

  6. READ VALUE USING GTS (NEUTRAL SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Stop and Start / Data List / Neutral Switch.

    5. In accordance with the display on the GTS, read the Data List.


      Powertrain > Stop and Start > Data List
      Tester Display
      Neutral Switch
      OK
      Tester Display Condition Normal Condition
      Neutral Switch Shift lever in P or N ON
      Shift lever not in P or N OFF
      Result
      Result Proceed to
      OK (w/ Entry and Start System) A
      OK (w/o Entry and Start System) B
      NG C

    B

    INSPECT IGNITION OR STARTER SWITCH ASSEMBLY Click here

    C

    INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

    A

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


    1. Disconnect the G82 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the A66 engine stop and start ECU connector.

    3. Disconnect the B36 park/neutral position switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G82-5 (STAR) - A66-17 (CLL) Always Below 1 Ω
      G82-5 (STAR) - Body ground Always 10 kΩ or higher
      A66-17 (CLL) - 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. B002ANYC23
      *a

      Front view of wire harness connector

      (to Engine Stop and Start ECU)

      Disconnect the 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
      A66-17 (CLL) - Body ground Engine started using push start switch assembly (ignition switch turned 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. INSPECT IGNITION OR STARTER SWITCH ASSEMBLY


    1. Inspect the ignition or starter switch assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE IGNITION OR STARTER SWITCH ASSEMBLY Click here

    OK

  10. CHECK HARNESS AND CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY - BATTERY)


    1. B0029Q2C09
      *a

      Front view of wire harness connector:

      (to Ignition or Starter Switch Assembly)

      Disconnect the ignition or starter switch assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G4-4 (AM2) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. CHECK HARNESS AND CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY - PARK/NEUTRAL POSITION SWITCH ASSEMBLY)


    1. Disconnect the G4 ignition or starter switch assembly connector.

    2. Disconnect the B36 park/neutral position switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G4-2 (ST2) - B36-4 (B) Always Below 1 Ω
      G4-2 (ST2) - Body ground Always 10 kΩ or higher
      B36-4 (B) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  12. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY


    1. Inspect the park/neutral position switch assembly.

      Click here

      Result
      Result Proceed to
      OK (w/ Entry and Start System) A
      OK (w/o Entry and Start System) B
      NG C

    B

    CHECK HARNESS AND CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY - ST NO. 1 RELAY) Click here

    C

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

    A

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


    1. Disconnect the G82 certification ECU (smart key ECU assembly) connector.

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G82-5 (STAR) - ST NO. 1 relay terminal 2 Shift lever in P or N Below 1 Ω
      Shift lever not in P or N 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  14. CHECK HARNESS AND CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY - ST NO. 1 RELAY)


    1. Disconnect the G4 ignition or starter switch assembly connector.

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G4-2 (ST2) - ST NO. 1 relay terminal 2 Shift lever in P or N Below 1 Ω
      Shift lever not in P or N 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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


    1. Connect an oscilloscope to the A66-21 (STA), A66-23 (STA2) and A66-6 (DGND) terminals of the engine stop and start ECU connector.

    2. B0029BAE16
      *1 (ST NO. 1 Relay)
      *2 (ST NO. 2 Relay)
      *3 0.016 seconds or more

      Check the waveform immediately after turning the ignition switch START.

      Item Condition
      Tester Connection

      A66-21 (STA) - A66-6 (DGND)

      A66-23 (STA2) - A66-6 (DGND)
      Condition Engine started by ignition or starter switch assembly*1 or push start switch assembly*2 operation

      • *1: w/o Entry and Start System

      • *2: w/ Entry and Start System

      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 19 Click here

    A

  16. 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

  17. CHECK HARNESS AND CONNECTOR (ST NO. 1, ST NO. 2 RELAY - BATTERY)

    B002ALIC01
    *1 No. 2 Engine Room Relay Block and Junction Block Assembly
    *a ST NO. 1 Relay Terminal
    *b ST NO. 2 Relay Terminal

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

    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
      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

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


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

    2. Disconnect the B87 starter assembly connector.

    3. 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 - B87-2 (SL1) Always Below 1 Ω
      ST NO. 2 relay terminal 3 - B87-1 (SL2) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


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

    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

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


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

    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

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


    1. Disconnect the A66 engine stop and start ECU connector.

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

    3. w/ Entry and Start System:

      Disconnect the G82 certification ECU (smart key ECU assembly) connector.

    4. Disconnect the B36 park/neutral position switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A66-21 (STA) - ST NO. 1 relay terminal 2 Always Below 1 Ω
      A66-21 (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

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


    1. Disconnect the A66 engine stop and start ECU connector.

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

    3. Disconnect the A62 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A66-23 (STA2) - ST NO. 2 relay terminal 2 Always Below 1 Ω
      A66-23 (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

  23. CHECK STARTER SIGNAL (OUTPUT WAVEFORM)


    1. Enter the following menus: Powertrain / Stop and Start / Active Test / Starter Motor Drive Magnet Switch.

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

    3. While performing the Active Test "Starter Motor Drive Magnet Switch" to forcibly operate the starter motor, count the number of times the waveform drops.

      Note


      • The Active Test "Starter Motor Drive Magnet Switch" is stopped automatically after the starter motor operates for 3 seconds.

      • Do not forcibly operate the starter pinion.

      B0029S7E02
      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

  24. INSPECT STARTER INRUSH CURRENT REDUCTION RELAY


    1. B0029O9C02
      *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

  25. INSPECT STARTER ASSEMBLY (C TERMINAL)


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

    2. B0029HUC02
      *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

  26. INSPECT STARTER ASSEMBLY (M TERMINAL)


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

    2. B0029TGC02
      *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

  27. 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

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

    B002AEUC17
    *a

    Front view of wire harness connector

    (to Engine Stop and Start ECU)

    		 - -

    1. Disconnect the 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
      A86-1 (BIN2) - Body ground Always 9.5 to 14 V
      A86-3 (BIN1) - Body ground Always 9.5 to 14 V

    3. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A66-1 (+B) - Body ground Ignition switch ON 9.5 to 14 V
      G87-18 (IG2) - Body ground Ignition switch ON 9.5 to 14 V
      G87-21 (IG1) - Body ground Ignition switch ON 9.5 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the A86 and A66 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
      A86-2 (GND2) - Body ground Always Below 1 Ω
      A86-8 (GND1) - Body ground Always Below 1 Ω
      A66-6 (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

  30. READ VALUE USING GTS (CLUTCH LOWER SW)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Stop and Start / Data List / Clutch Lower SW

    5. In accordance with the display on the GTS, read the Data List.


      Powertrain > Stop and Start > Data List
      Tester Display
      Clutch Lower SW
      OK
      Tester Display Condition Normal Condition
      Clutch Lower SW Fully Depressed ON
      Fully Released OFF
      Result
      Result Proceed to
      Data Monitor display is not within standards A
      Data Monitor display is within standards (w/o Entry and Start System) B
      Data Monitor display is within standards (w/ Entry and Start System) C

    B

    INSPECT IGNITION OR STARTER SWITCH ASSEMBLY Click here

    C

    CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ENGINE STOP AND START ECU) Click here

    A

  31. INSPECT CLUTCH START SWITCH ASSEMBLY (FOR LOWER)


    1. Inspect the clutch start switch assembly (for lower).

      Click here

      Result
      Result Proceed to
      OK (w/o Smart Entry and Start System) A
      OK (w/ Smart Entry and Start System) B
      NG C

    B

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

    C

    REPLACE CLUTCH START SWITCH ASSEMBLY (FOR LOWER) Click here

    A

  32. CHECK HARNESS AND CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY - ST NO. 1 RELAY)


    1. Disconnect the A66 engine stop and start ECU connectors.

    2. Disconnect the G4 ignition or starter switch assembly connector.

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G4-2 (ST2) - ST NO. 1 relay terminal 2 Fully Depressed Below 1 Ω
      Fully Released 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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


    1. Disconnect the G82 certification ECU (smart key ECU assembly) connector.

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G82-5 (STAR) - ST NO. 1 relay terminal 2 Fully Depressed Below 1 Ω
      Fully Released 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  34. INSPECT IGNITION OR STARTER SWITCH ASSEMBLY


    1. Inspect the ignition or starter switch assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE IGNITION OR STARTER SWITCH ASSEMBLY Click here

    OK

  35. CHECK HARNESS AND CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY - BATTERY)


    1. Disconnect the G4 ignition or starter switch assembly connector.

    2. B0029P1C05
      *a

      Front view of wire harness connector

      (to Ignition or Starter Switch Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G4-4 (AM2) - Body ground Always 9.5 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  36. CHECK HARNESS AND CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY - CLUTCH START SWITCH ASSEMBLY (FOR LOW))


    1. Disconnect the G4 ignition or starter switch assembly connector.

    2. Disconnect the A66 engine stop and start ECU connector.

    3. Disconnect the A4 clutch start switch assembly (for low) connector.

    4. Disconnect the A62 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G4-2 (ST2) - A4-2 Always Below 1 Ω
      G4-2 (ST2) - Body ground Always 10 kΩ or higher
      A4-2 - Body ground Always 10 kΩ or higher
      A66-17 (CLL) - Body ground Always 10 kΩ or higher
      A62-23 (NSW) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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


    1. Disconnect the A4 clutch start switch assembly (for low) connector.

    2. Disconnect the G82 certification ECU (smart key ECU assembly) connector.

    3. Disconnect the A66 engine stop and start ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G82-5 (STAR) - A66-17 (CLL) Always Below 1 Ω
      G82-5 (STAR) - Body ground Always 10 kΩ or higher
      A66-17 (CLL) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. B002ANYC23
      *a

      Front view of wire harness connector

      (to Engine Stop and Start ECU)

      Disconnect the 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
      A66-17 (CLL) - Body ground Engine started using push start switch assembly (ignition switch turned 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 SMART ENTRY AND START SYSTEM Click here

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


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

    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 2 - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. w/ Entry and Start System:

      Disconnect the G82 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the A4 clutch start switch assembly (for lower) connector.

    3. Disconnect the A66 engine stop and start ECU connector.

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A66-21 (STA) - ST NO. 1 relay terminal 2 Always Below 1 Ω
      A66-21 (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

  41. 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