EASY AND SMOOTH START SYSTEM, Diagnostic DTC:C1386/28

DTC Code DTC Name
C1386/28 ES Start Operation / Release Switch

DESCRIPTION

DTC No. Detection Condition Trouble Area
C1386/28 The ON signal circuit and the off signal circuit of the ES start timing switch are both switched ON, or both off.

  • Harness or connector

  • ES start timing switch assembly

  • Electric vehicle control ECU assembly

WIRING DIAGRAM

A01CH2YE01

INSPECTION PROCEDURE

Note


  • After replacing the electric vehicle control ECU assembly, perform clutch pedal stroke sensor assembly release position calibration Click here.

  • DTCs stored in the electric vehicle control ECU assembly are not cleared even after the system returns to a normal condition, so clear the DTCs after performing troubleshooting Click here.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (ELECTRIC VEHICLE CONTROL ECU ASSEMBLY - ES START TIMING SWITCH ASSEMBLY)


    1. Turn the ignition switch off.

    2. Disconnect the E42 and E43 electric vehicle control ECU assembly connector.

    3. Disconnect the E44 ES start timing switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E43-8 (ON) - E44-5 (MSW2) Always Below 1 Ω
      E42-18 (OFF) - E44-6 (MSW1) Always Below 1 Ω
      E43-8 (ON) or E44-5 (MSW2) - Body ground Always 10 kΩ or higher
      E42-18 (OFF) or E44-6 (MSW1) - Body ground Always 10 kΩ or higher

    5. Reconnect the E42 and E43 electric vehicle control ECU assembly connector.

    6. Reconnect the E44 ES start timing switch assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK HARNESS AND CONNECTOR (EED TERMINAL)


    1. A01CJ1ME01
      Text in Illustration
      *a

      Component with harness connected

      (ES Start Timing Switch Assembly)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      E44-2 (MSW+) - Body ground Ignition switch ON 20 to 28 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK ES START TIMING SWITCH ASSEMBLY


    1. A01CJ1ME03
      Text in Illustration
      *a

      Component with harness connected

      (ES Start Timing Switch Assembly)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      E44-5 (MSW2) - Body ground

      Ignition switch ON

      ES start timing switch assembly ON

      		 20 to 28 V

      Ignition switch ON

      ES start timing switch assembly off

      		 Below 1 V
      E44-6 (MSW1) - Body ground

      Ignition switch ON

      ES start timing switch assembly ON

      		 Below 1 V

      Ignition switch ON

      ES start timing switch assembly off

      		 20 to 28 V

    NG

    REPLACE ES START TIMING SWITCH ASSEMBLY Click here

    OK

  4. READ VALUE USING INTELLIGENT TESTER


    1. Warm up the engine.

    2. Turn the ignition switch off.

    3. Replace the normal DLC3 cable (12 V specification) for the intelligent tester with the 24 V DLC3 cable.

      Note

      Be sure to use the 24 V DLC3 cable when connecting the intelligent tester to the DLC3. Using the normal DLC3 cable (12 V specification) will cause damage to the tester.

    4. Connect the intelligent tester to the DLC3.

    5. Turn the ignition switch to ON.

    6. Turn the intelligent tester on.

    7. Enter the following menus: Powertrain / Vehicle Control / Data List.

    8. According to the display on the intelligent tester, read the Data List.

      Vehicle Control
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      ES Start Main Switch (ON)

      ES start timing switch (ON) /

      OFF / ON

      OFF: ES start timing switch off

      ON: ES start timing switch ON

      		 -
      ES Start Main Switch (OFF)

      ES start timing switch (OFF) /

      OFF / ON

      OFF: ES start timing switch ON

      ON: ES start timing switch off

      		 -

    9. Using the intelligent tester, check that the switch condition displayed on the intelligent tester changes according to ES start timing switch assembly operation.

      OK
      The intelligent tester display changes in response to operation of the ES start timing switch assembly.

    NG

    REPLACE ELECTRIC VEHICLE CONTROL ECU ASSEMBLY Click here

    OK

  5. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  6. CHECK FOR DTC


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

    B

    REPLACE ELECTRIC VEHICLE CONTROL ECU ASSEMBLY Click here

    A

    USE SIMULATION METHOD TO CHECK Click here