MULTI-MODE MANUAL TRANSAXLE SYSTEM Starter Signal Circuit

DTC Code DTC Name
Starter Signal Circuit

DESCRIPTION

  • Engine starting control (w/ Entry and Start System)

  • In this vehicle, the ST NO. 1 relay that supplies power to the starter motor is operated by the cranking holding function of the certification ECU. When the appropriate vehicle conditions are satisfied, the brake pedal is depressed and the transaxle gear is in neutral, the engine can be cranked.

    If the brake pedal is not depressed or the transaxle gear is not in neutral, the engine cannot be cranked.

    During cranking, the ST NO. 1 relay operation signal (STA signal) is input into the STA terminal of the TCM, and is used to control the multi-mode manual transaxle system.

  1. Engine starting control (w/o Entry and Start System)

  2. When the ignition switch is turned to ON and the brake pedal is depressed, the TCM turns on the shift lock solenoid in order to release shift lock.

  3. When the shift lever is in N, the TCM detects that the shift lever is in N using the shift position sensor.

  4. When the engine is started, the start signal is sent to the TCM through the neutral position switch. When the TCM receives this signal, the ST NO. 1 (starter) relay is turned on to cause the engine start.

WIRING DIAGRAM

Refer to DTC P0617.

Click here

CAUTION / NOTICE / HINT

Tip:

If DTC P0703 is output, troubleshoot this code first.

Note:

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

PROCEDURE

  1. READ VALUE USING GTS (STA SWITCH SIGNAL)

    1. Connect an GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Multi-Mode M/T / Data List / STA Switch Signal.

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

      Powertrain > Multi-Mode M/T > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      STA Switch Signal

      STA signal

      OFF or ON

      ON: Cranking

      -

      OK

      ON is displayed in the Data List when cranking.

      Powertrain > Multi-Mode M/T > Data List

      Tester Display

      STA Switch Signal

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click hereClick here

    NG

  2. CHECK ST NO. 1 RELAY (POWER SOURCE)

    1. A290378C08

      *1

      Engine Room Relay Block and Junction Block Assembly

      *2

      ST NO. 1 Relay (Starter Relay)

      Remove the ST NO. 1 relay from the 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 2 - Body ground

      Cranking

      11 to 14 V

      Result

      Result

      Proceed to

      OK

      A

      NG (w/o Entry and Start System)

      B

      NG (w/ Entry and Start System)

      C
    B

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

    C

    CHECK HARNESS AND CONNECTOR (ST NO. 1 RELAY - NEUTRAL POSITION SWITCH)Click here

    A

  3. INSPECT ST NO. 1 RELAY (STARTER RELAY)

    1. Inspect the ST NO. 1 relay.

      Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE ST NO. 1 RELAY (STARTER RELAY)

    OK

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

    1. 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
    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - TCM)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. CHECK HARNESS AND CONNECTOR (ST NO. 1 RELAY - TCM)

    1. Disconnect the TCM connector.

    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 - A108-4 (STRL)

      Always

      Below 1 Ω

      ST NO. 1 relay terminal 2 - A108-6 (STA)

      Always

      Below 1 Ω

      ST NO. 1 relay terminal 2 or A108-4 (STRL) - Body ground

      Always

      10 kΩ or higher

      ST NO. 1 relay terminal 2 or A108-6 (STA) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK TCM (TMN VOLTAGE)

    1. C239993C04

      *a

      Front view of wire harness connector

      (to TCM)

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      A108-3 (TMN) - Body ground

      Engine cranking

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    NG

    CHECK HARNESS AND CONNECTOR (TCM - NEUTRAL POSITION SWITCH ASSEMBLY)Click here

    OK

  7. REPLACE TCM

    1. Replace the TCM.

      for LHD:Click hereClick here

      for RHD:Click hereClick here

    Result

    Proceed to

    NEXT
    NEXT

  8. PERFORM INITIALIZATION

    1. Perform the initialization and learning procedure.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

    END

  9. CHECK HARNESS AND CONNECTOR (TCM - NEUTRAL POSITION SWITCH ASSEMBLY)

    1. Disconnect the neutral position switch assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A108-3 (TMN) - c1-1 (THE)

      Always

      Below 1 Ω

      A108-3 (TMN) or c1-1 (THE) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. INSPECT NEUTRAL POSITION SWITCH

    1. Inspect the neutral position switch.

      Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE NEUTRAL POSITION SWITCH

    Click here

    OK

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

    1. Disconnect the ignition or starter switch assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      c1-2 - E4-2 (ST2)

      Always

      Below 1 Ω

      c1-2 or E4-2 (ST2) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  12. INSPECT IGNITION OR STARTER SWITCH ASSEMBLY

    1. Inspect the ignition or starter switch assembly.

      Click here

    Result

    Proceed to

    OK

    NG
    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY - BATTERY)

    NG

    REPLACE IGNITION OR STARTER SWITCH ASSEMBLY

    Click here

  13. CHECK HARNESS AND CONNECTOR (ST NO. 1 RELAY - NEUTRAL POSITION SWITCH)

    1. Disconnect the neutral position switch assembly connector.

    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 - c1-1 (THE)

      Always

      Below 1 Ω

      ST NO. 1 relay terminal 2 or c1-1 (THE) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  14. INSPECT NEUTRAL POSITION SWITCH

    1. Inspect the neutral position switch.

      Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE NEUTRAL POSITION SWITCH

    Click here

    OK

  15. CHECK HARNESS AND CONNECTOR (NEUTRAL POSITION SWITCH - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

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

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      c1-2 (TMN) - E33-5 (STAR)

      Always

      Below 1 Ω

      c1-2 (TMN) or E33-5 (STAR) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR