STOP AND START SYSTEM Starter Signal Circuit

DTC Code DTC Name
Starter Signal Circuit

DESCRIPTION

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

WIRING DIAGRAM

  1. for Manual Transaxle (for 1WW)

    A360621E01
    A360622E01
    A360623E01

  2. for Manual Transaxle (except 1WW)

    A359116E01
    A359117E01
    A359118E01

  3. for CVT

    A360625E01
    A356198E01
    A359119E01

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 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

  • 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)

    1. A285704C37

      *a

      Front view of wire harness connector

      (to Engine Stop and Start ECU)

      Disconnect the A8 and E24 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

      A8-7 (BIN) - 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

      A8-5 (+B) - Body ground

      Ignition Switch ON

      9.5 to 14 V

      E24-17 (IG1) - Body ground

      Ignition Switch ON

      9.5 to 14 V

      E24-20 (IG2) - 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 A8 and A9 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

      A8-8 (GND) - Body ground

      Always

      Below 1 Ω

      A9-17 (VB-) - 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

    A

    Engine does not crank

    B
    B

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

    A

  6. CONFIRM MODEL

    1. Choose the model to be inspected.

    Result

    Result

    Proceed to

    for Manual Transaxle

    A

    for CVT

    B
    B

    READ VALUE USING GTS (NEUTRAL SWITCH)Click here

    A

  7. 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 ASSEMBLYClick here

    C

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

    A

  8. 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 Star System)

    A

    OK ( w/ Smart Entry and Star 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

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

    1. Disconnect the A9 engine stop and start ECU connectors.

    2. Disconnect the E4 ignition or starter switch assembly connector.

    3. Remove the ST NO. 1 relay from 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

      E4-2 (ST2) - ST NO. 1 relay terminal 2

      Fully Depressed

      Below 1 Ω

      E4-2 (ST2) - ST NO. 1 relay terminal 2

      Fully Released

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click hereClick here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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

    1. Disconnect the E33 certification ECU (smart key ECU assembly) connector.

    2. Remove the ST NO. 1 relay from 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

      E33-5 (STAR) - ST NO. 1 relay terminal 2

      Fully Depressed

      Below 1 Ω

      E33-5 (STAR) - ST NO. 1 relay terminal 2

      Fully Released

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click hereClick here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  11. INSPECT IGNITION OR STARTER SWITCH ASSEMBLY

    1. Inspect the ignition or starter switch assembly.

      for 1ND-TV:Click here

      for 1WW:Click here

      for 8NR-FTS:Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE IGNITION OR STARTER SWITCH ASSEMBLY

    for 1ND-TV:Click here

    for 1WW:Click here

    for 8NR-FTS:Click here

    OK

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

    1. Disconnect the E4 ignition or starter switch assembly connector.

    2. A316828C03

      *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

      E4-4 (AM2) - 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 (IGNITION OR STARTER SWITCH ASSEMBLY - CLUTCH START SWITCH ASSEMBLY (FOR LOW))

    1. Disconnect the E4 ignition or starter switch assembly connector.

    2. Disconnect the A9 engine stop and start ECU connector.

    3. Disconnect the A173 ECM connector. *

    4. Disconnect the A5 clutch start switch assembly (for low) connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E4-2 (ST2) - A5-2

      Always

      Below 1 Ω

      E4-2 (ST2) - Body ground

      Always

      10 kΩ or higher

      A5-2 - Body ground

      Always

      10 kΩ or higher

      A9-28 (CLL) - Body ground

      Always

      10 kΩ or higher

      A173-57(NSW) - Body ground*

      Always

      10 kΩ or higher

      • *: for 8NR-FTS

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click hereClick here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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

    1. Disconnect the A5 clutch start switch assembly (for low) connector.

    2. Disconnect the E33 certification ECU (smart key ECU assembly) connector.

    3. Disconnect the A9 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

      E33-5 (STAR) - A9-28 (CLL)

      Always

      Below 1 Ω

      E33-5 (STAR) - Body ground

      Always

      10 kΩ or higher

      A9-28 (CLL) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

    1. A288763C02

      *a

      Front view of wire harness connector

      (to Engine Stop and Start ECU)

      Disconnect the A9 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

      A9-28 (CLL) - Body ground

      Engine start

      9.5 to 14 V

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click hereClick here

    NG

    GO TO SMART ENTRY AND START SYSTEM

    Click hereClick here

  16. 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

    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 ASSEMBLYClick here

    C

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

    A

  17. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY

    1. Inspect the park/neutral position switch assembly.

      Click here

    Result

    Result

    Proceed to

    OK ( w/o Smart Entry and Star System)

    A

    OK ( w/ Smart Entry and Star System)

    B

    NG

    C
    B

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

    C

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY

    Click here

    A

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

    1. Disconnect the A9 engine stop and start ECU connectors.

    2. Disconnect the E4 ignition or starter switch assembly connector.

    3. Remove the ST NO. 1 relay from 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

      E4-2 (ST2) - ST NO. 1 relay terminal 2

      Fully Depressed

      Below 1 Ω

      E4-2 (ST2) - ST NO. 1 relay terminal 2

      Fully Released

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click hereClick here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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

    1. Disconnect the E33 certification ECU (smart key ECU assembly) connector.

    2. Remove the ST NO. 1 relay from 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

      E33-5 (STAR) - ST NO. 1 relay terminal 2

      Shift lever in P or N

      Below 1 Ω

      E33-5 (STAR) - ST NO. 1 relay terminal 2

      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 hereClick here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  20. INSPECT IGNITION OR STARTER SWITCH ASSEMBLY

    1. Inspect the ignition or starter switch assembly.

      for 1ND-TV:Click here

      for 1WW:Click here

      for 8NR-FTS:Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE IGNITION OR STARTER SWITCH ASSEMBLY

    for 1ND-TV:Click here

    for 1WW:Click here

    for 8NR-FTS:Click here

    OK

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

    1. Disconnect the E4 ignition or starter switch assembly connector.

    2. A316828C03

      *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

      E4-4 (AM2) - Body ground

      Always

      9.5 to 14 V

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

    1. Disconnect the E4 ignition or starter switch assembly connector.

    2. Disconnect the A9 engine stop and start ECU connector.

    3. Disconnect the A173 ECM connector.

    4. Disconnect the B110 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

      E4-2 (ST2) - B110-4 (B)

      Always

      Below 1 Ω

      E4-2 (ST2) - Body ground

      Always

      10 kΩ or higher

      B110-4 (B) - Body ground

      Always

      10 kΩ or higher

      A9-28 (CLL) - Body ground

      Always

      10 kΩ or higher

      A173-57 (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 hereClick here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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

    1. Disconnect the B110 park/neutral position switch assembly connector.

    2. Disconnect the E33 certification ECU (smart key ECU assembly) connector.

    3. Disconnect the A9 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

      E33-5 (STAR) - A9-28 (CLL)

      Always

      Below 1 Ω

      E33-5 (STAR) - Body ground

      Always

      10 kΩ or higher

      A9-28 (CLL) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

    1. A288763C02

      *a

      Front view of wire harness connector

      (to Engine Stop and Start ECU)

      Disconnect the A9 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

      A9-28 (CLL) - Body ground

      Engine start

      9.5 to 14 V

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click hereClick here

    NG

    GO TO SMART ENTRY AND START SYSTEM

    Click hereClick here

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

    1. Remove the ST NO. 1 relay from 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

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

    1. Disconnect the E33 certification ECU (smart key ECU assembly) connector. (w/ Entry and Start System)

    2. Disconnect the A5 clutch start switch assembly (for lower) connector. (for Manual Transaxle)

    3. Disconnect the B110 park/neutral position switch assembly connector. (for CVT)

    4. Disconnect the A9 engine stop and start ECU connector.

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

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A9-21 (STA) - ST NO. 1 relay terminal 2

      Always

      Below 1 Ω

      A9-21 (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

  27. INSPECT STARTER ASSEMBLY

    1. Inspect the starter assembly.

      for 1ND-TV:Click here

      for 1WW:Click here

      for 8NR-FTS, CVT:Click here

      for 8NR-FTS, Manual Transaxle:Click here

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click hereClick here

    NG

    REPLACE STARTER ASSEMBLY

    for 1ND-TV:Click here

    for 1WW:Click here

    for 8NR-FTS, CVT:Click hereClick here

    for 8NR-FTS, Manual Transaxle:Click hereClick here