MULTI-MODE MANUAL TRANSAXLE SYSTEM IG Signal Circuit

DTC Code DTC Name
IG Signal Circuit

DESCRIPTION

When the ignition switch is turned to ON, the battery voltage is applied to terminal IG of the TCM. Power is supplied to the TCM via terminals +B and IG.The TCM interprets the ignition switch condition through the potential at the IG terminal.

WIRING DIAGRAM

C279541E02

CAUTION / NOTICE / HINT

Note:

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

PROCEDURE

  1. READ VALUE USING GTS (IGNITION SIGNAL)

    1. Connect the GTS to the DLC3

    2. Turn the ignition switch to ON.

    3. Turn the GTS on

    4. Enter the following menu: Powertrain / Multi-Mode M/T / Data List.

    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

      Ignition Signal

      Ignition switch signal

      OFF or ON

      ON: ignition switch to ON

      -

      OK

      [ON] is displayed in the item [Ignition Signal] when the ignition switch is turned to ON.

      Powertrain > Multi-Mode M/T > Data List

      Tester Display

      Ignition Signal

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click hereClick here

    NG

  2. INSPECT TCM (IG TERMINAL VOLTAGE)

    1. C239995C10

      *a

      Front view of wire harness connector

      (to TCM)

      Disconnect the TCM connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      E104-3 (IG) - Body ground

      Ignition switch off

      Below 1 V

      ignition switch to ON

      11 to 14 V

      Result

      Result

      Proceed to

      NG

      A

      OK

      B
    B

    CHECK HARNESS AND CONNECTOR (TCM - BODY GROUND)Click here

    A

  3. CHECK HARNESS AND CONNECTOR (IG2 RELAY - BODY GROUND)

    1. Remove the IG2 relay from the 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

      IG2 relay terminal 2 - Body ground

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (IG2 RELAY - IGNITION SWITCH OR CERTIFICATION ECU)

    1. Remove the IG2 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

      IG2 relay terminal 1 - Body ground

      Ignition switch off

      Below 1 V

      Ignition switch ON

      11 to 14 V

      Result

      Result

      Proceed to

      OK

      A

      NG (w/ Entry and Start System)

      B

      NG (w/o Entry and Start System)

      C
    B

    CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - IG2 RELAY)Click here

    C

    INSPECT IGNITION OR STARTER SWITCH ASSEMBLYClick here

    A

  5. CHECK HARNESS AND CONNECTOR (IG2 RELAY - BATTERY)

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      IG2 relay terminal 3 - Body ground

      Always

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT RELAY (IG2 RELAY)

    1. Inspect the IG2 relay.

      Click here

    Result

    Proceed to

    OK

    NG
    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IG2 RELAY - TCM)

    NG

    REPLACE RELAY (IG2 RELAY)

  7. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - IG2 RELAY)

    1. Disconnect the certification ECU connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E33-9 (IG2D) - IG2 relay terminal 1

      Always

      Below 1 Ω

      IG2 relay terminal 3 - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    GO TO ENTRY AND START SYSTEM

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  8. 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

  9. CHECK HARNESS AND CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY - IG2 RELAY)

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E4-3 (IG2) - IG2 relay terminal 1

      Always

      Below 1 Ω

      IG2 relay terminal 1 - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  10. CHECK HARNESS AND CONNECTOR (TCM - BODY GROUND)

    1. C239995C11

      *a

      Front view of wire harness connector

      (to TCM)

      Disconnect the TCM connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E104-6 (GND) - Body ground

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. REPLACE TCM

    1. Replace the TCM.

      for LHD:Click hereClick here

      for RHD:Click hereClick here

    Result

    Proceed to

    NEXT
    NEXT

  12. PERFORM INITIALIZATION

    1. Perform the initialization and learning procedure.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

    END