VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1268

DTC Code DTC Name
C1268 Transfer L4 Position Switch Circuit

DESCRIPTION

DTC Code DTC Detection Condition Trouble Area
C1268 No signal is input to the EXI4 terminal of the skid control ECU.

  • L4 position switch (No. 1 transfer indicator switch)

  • L4 position switch circuit

  • Skid control ECU (Brake actuator assembly)

  • Transmission control ECU assembly (for 1KD-FTV)

  • ECM (for 1GR-FE)

WIRING DIAGRAM

A01E1TYE18
A01E1TYE17
A01E00OE16

INSPECTION PROCEDURE

Note


  • After replacing the brake actuator assembly, perform calibration Click here.

  • Before disconnecting the connector, make sure that there are no problems with the connection.

  • After disconnecting the connector, make sure that the connector case and terminals are not deformed or corroded.

PROCEDURE


  1. CHECK TERMINAL VOLTAGE (EXI4 TERMINAL)


    1. A01DW3AE59
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Skid Control ECU [Brake Actuator Assembly])

      Connect the skid control ECU (brake actuator assembly) connector.

    2. Set the vehicle to the L4 state using the transfer shift lever.

    3. Disconnect the skid control ECU (brake actuator assembly) connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      S35-9 (EXI4) - Body ground

      • Ignition switch ON

      • Transfer shift position L4

      		 Below 1.5 V

    5. Connect the skid control ECU (brake actuator assembly) connector.

    6. Set the vehicle to the H4 or H2 state using the transfer shift lever.

    7. Disconnect the skid control ECU (brake actuator assembly) connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      S35-9 (EXI4) - Body ground

      • Ignition switch ON

      • Transfer shift position not L4

      		 11 to 14 V

    NG

    CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - L4 POSITION SWITCH) Click here

    OK

  2. RECONFIRM DTC


    1. Clear the DTC Click here.

    2. Turn the ignition switch off.

    3. Check if the same DTC is output.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output for LHD B
      for RHD C

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    C

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

  3. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - L4 POSITION SWITCH)


    1. Turn the ignition switch off.

    2. Disconnect the skid control ECU (brake actuator assembly) connector.

    3. for 1KD-FTV (Automatic Transmission):

      Disconnect the T37 transmission control ECU connector.

      for 1GR-FE:

      Disconnect the E17 ECM connector.

    4. Disconnect the L4 position switch (No. 1 transfer indicator switch) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      S35-9 (EXI4) - T4-1 Always Below 1 Ω
      S35-9 (EXI4) - Body ground Always 10 kΩ or higher
      T4-2 - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT L4 POSITION SWITCH


    1. Turn the ignition switch off.

    2. Remove the L4 position switch (No. 1 transfer indicator switch).

    3. Inspect the L4 position switch (No. 1 transfer indicator switch) Click here.


    NG

    REPLACE NO. 1 TRANSFER INDICATOR SWITCH

    OK

  5. CHECK TERMINAL VOLTAGE (L4 POSITION SWITCH POWER SOURCE CIRCUIT)


    1. A01DXC3E02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to L4 Position Switch [No. 1 Transfer Indicator Switch])

      Turn the ignition switch off.

    2. Disconnect the L4 position switch (No. 1 transfer indicator switch) connector.

    3. Disconnect the skid control ECU (brake actuator assembly) connector.

    4. for 1KD-FTV (Automatic Transmission):

      Connect the transmission control ECU connector.

      for 1GR-FE:

      Connect the ECM connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      1 - 2 Ignition switch ON 11 to 14 V
      Result
      Result Proceed to
      OK A
      NG for 1KD-FTV (Manual Transmission) and 2KD-FTV B
      for 1KD-FTV (Automatic Transmission) C
      for 1GR-FE D

    B

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    C

    CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - TRANSMISSION CONTROL ECU) Click here

    D

    CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - ECM) Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

  6. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - TRANSMISSION CONTROL ECU)


    1. Turn the ignition switch off.

    2. Disconnect the skid control ECU (brake actuator assembly) connector.

    3. Disconnect the T37 transmission control ECU connector.

    4. Disconnect the L4 position switch (No. 1 transfer indicator switch) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      S35-9 (EXI4) - T37-15 (L4) Always Below 1 Ω
      S35-9 (EXI4) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE TRANSMISSION CONTROL ECU ASSEMBLY

  7. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - ECM)


    1. Turn the ignition switch off.

    2. Disconnect the skid control ECU (brake actuator assembly) connector.

    3. Disconnect the E17 ECM connector.

    4. Disconnect the L4 position switch (No. 1 transfer indicator switch) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      S35-9 (EXI4) - E17-13 (L4) Always Below 1 Ω
      S35-9 (EXI4) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here