ELECTRONIC SHIFT LEVER SYSTEM, Diagnostic DTC:C2311

DTC Code DTC Name
C2311 Communication Error from HV ECU

DESCRIPTION

The transmission control ECU assembly receives a P position switch signal from the hybrid vehicle 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 hybrid vehicle control ECU and the transmission control ECU assembly.

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

  • Transmission control ECU assembly

  • Hybrid vehicle control ECU

  • Wire harness or connector

WIRING DIAGRAM

A005DMVE10
*a Hybrid Vehicle Control ECU
*b Transmission Control ECU Assembly

PROCEDURE


  1. CHECK TRANSMISSION CONTROL ECU ASSEMBLY


    1. Turn the power switch on (IG).

    2. A005ADEE02
      Text in Illustration
      *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 A24-22 (PCON) - A24-1 (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.

    3. Turn the power switch off.


    OK

    REPLACE TRANSMISSION CONTROL ECU ASSEMBLY Click here

    NG

  2. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL ECU ASSEMBLY - HYBRID VEHICLE CONTROL ECU)


    1. Disconnect the A24 transmission control ECU assembly connector.

    2. Disconnect the L5 hybrid vehicle control ECU connector.

    3. A005AFZE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Transmission Control ECU Assembly)
      *b

      Rear view of wire harness connector

      (to Hybrid Vehicle Control ECU)

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      A24-22 (PCON) - L5-8 (PCON) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A24-22 (PCON) or L5-8 (PCON) - Body ground and other terminals Power switch off 10 kΩ or higher

    4. Connect the L5 hybrid vehicle control ECU connector.

    5. Connect the A24 transmission control ECU assembly connector.


    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR