ELECTRONIC SHIFT LEVER SYSTEM, Diagnostic DTC:C2311

DTC Code DTC Name
C2311 Communication Error from EV ECU

DESCRIPTION

The transmission control ECU assembly receives a P position switch signal from the EV control ECU and activates the parking lock motor by controlling current, causing the parking lock mechanism to switch. The transmission control ECU assembly stores this DTC when it detects a communication error between the EV control ECU and the transmission control ECU assembly.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Memory
C2311 Communication Error from EV ECU With the power switch on (IG) (IG circuit malfunction is not detected), a signal cannot be received from the EV control ECU (open or short in the PCON terminal circuit) or a pulse signal malfunction is received from the EV control ECU for 2 seconds or more.

  • Transmission control ECU assembly

  • EV control ECU

  • Wire harness or connector

  • Master Warning Light: Comes on

  • Multi-information Display Error Message: Comes on

 DTC stored

WIRING DIAGRAM

A01MJJJE02
*a EV Control ECU
*b Transmission Control ECU Assembly

PROCEDURE


  1. CHECK TRANSMISSION CONTROL ECU ASSEMBLY


    1. Turn the power switch on (IG).

    2. A01MGSEC09
      *a

      Component with harness connected

      (Transmission Control ECU Assembly)
      *b Waveform

      Connect an oscilloscope between the transmission control ECU assembly terminals specified in the table below, and measure the waveform.

      Item Contents
      Symbols A26-22 (PCON) - A26-1 (E1)
      Tool setting 10 V/DIV., 10 msec./DIV.
      Vehicle condition Power switch on (IG)
      OK
      The waveform is similar to that shown in the illustration.

      Tech Tips

      Perform this inspection with the connector connected.

      Result
      Proceed to
      OK
      NG

    3. Turn the power switch off.


    OK

    REPLACE TRANSMISSION CONTROL ECU ASSEMBLY Click here

    NG

  2. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL ECU - EV CONTROL ECU)


    1. Disconnect the transmission control ECU assembly connector.

    2. Disconnect the EV control ECU connector.

    3. A01MHCIC02
      *a

      Front view of wire harness connector

      (to Transmission Control ECU Assembly)
      *b

      Rear view of wire harness connector

      (to EV Control ECU)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A26-22 (PCON) - G45-8 (PCON) Power switch off Below 1 Ω
      A26-22 (PCON) or G45-8 (PCON) - Body ground and other terminals Power switch off 10 kΩ or higher

    4. Connect the EV control ECU connector.

    5. Connect the transmission control ECU assembly connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE EV CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR