ELECTRONIC SHIFT LEVER SYSTEM, Diagnostic DTC:C2311

DTC Code DTC Name
C2311 Communication Error from HV ECU

DESCRIPTION

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

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 power management control ECU (open or short in the PCON terminal circuit) or a pulse signal malfunction is received from the power management control ECU for 2 seconds or more.

  • Transmission control ECU assembly

  • Power management control ECU

  • Wire harness or connector

WIRING DIAGRAM

A003T9UE03

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK TRANSMISSION CONTROL ECU ASSEMBLY


    1. Turn the power switch on (IG).

    2. A003S7AE05
      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 A97-22 (PCON) - A97-1 (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.


    NG

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

    OK

    REPLACE TRANSMISSION CONTROL ECU ASSEMBLY Click here

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


    1. Disconnect connector A97 from the transmission control ECU assembly.

    2. Disconnect connector A99 from the power management control ECU.

    3. A003SM9E03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Transmission Control ECU Assembly)
      *b

      Rear view of wire harness connector

      (to Power Management Control ECU)

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

      Standard Resistance (Check for Open)
      Tester Connection Switch Condition Specified Condition
      A97-22 (PCON) - A99-22 (PCON) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Switch Condition Specified Condition
      A97-22 (PCON) or A99-22 (PCON) - Body ground and other terminals Power switch off 10 kΩ or higher

    4. Connect the power management control ECU connector.

    5. Connect the transmission control ECU assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here