ELECTRONIC SHIFT LEVER SYSTEM, Diagnostic DTC:C2310

DTC Code DTC Name
C2310 Open or Short Circuit in Battery Circuit

DESCRIPTION

Auxiliary battery voltage is constantly applied to terminal BATT. This voltage is used to power the transmission control ECU assembly memory. The transmission control ECU assembly stores this DTC when it detects a malfunction related to terminal BATT.

Tech Tips

When there is an open or short in the BATT circuit, information on the actuator position (park (P) selected or a shift state other than park (P) selected) stored in the transmission control ECU assembly is cleared every time the power switch is turned off. Therefore, the ECU works to recognize the position each time the power switch is turned on (IG). As a result, the time from when the power switch is turned on (IG) until "READY" is indicated may become longer than normal.

DTC No. DTC Detection Condition Trouble Area
C2310 With the power switch on (IG) (IG circuit malfunction is not detected), voltage of transmission control ECU assembly terminal BATT is 8 V or less for 1 second or more.

  • P CON MAIN fuse

  • Transmission control ECU assembly

  • Wire harness or connector

WIRING DIAGRAM

A004W3LE14
*a P CON MAIN
*b MAIN
*c Auxiliary Battery
*d Transmission Control ECU Assembly

PROCEDURE


  1. INSPECT FUSE (P CON MAIN)


    1. Remove the P CON MAIN fuse from the engine room junction block assembly.

    2. A004XHFE02
      Text in Illustration
      *1 Engine Room Junction Block Assembly
      *2 P CON MAIN Fuse

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P CON MAIN fuse Always Below 1 Ω

    3. Install the P CON MAIN fuse.


    NG

    REPLACE FUSE (P CON MAIN)

    OK

  2. READ VALUE USING INTELLIGENT TESTER (BATTERY VOLTAGE VALUE)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Chassis / Transmission Control / Data List / Battery Voltage Value.

    4. Read the Data List displayed on the intelligent tester.

      Result
      Tester Display Condition Specified Condition
      Battery Voltage Value Always 9 to 14 V

    5. Turn the power switch off.


    OK

    REPLACE TRANSMISSION CONTROL ECU ASSEMBLY Click here

    NG

  3. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL ECU ASSEMBLY - P CON MAIN FUSE)


    1. Disconnect connector A21 from the transmission control ECU assembly.

    2. Disconnect the P CON MAIN fuse from the engine room junction block assembly.

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

      A004ZC7E01
      Standard Resistance (Check for Open)
      Tester Connection Switch Condition Specified Condition
      A21-15 (BATT) - 2 (P CON MAIN fuse) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Switch Condition Specified Condition
      A21-15 (BATT) or 2 (P CON MAIN fuse) - Body ground and other terminals Power switch off 10 kΩ or higher
      Text in Illustration
      *1 Engine Room Junction Block Assembly
      *a

      Front view of wire harness connector

      (to Transmission Control ECU Assembly)
      *b P CON MAIN Fuse Connector of Engine Room Junction Block Assembly

      Note

      Be careful not to break the fuse holder by forcing the tester probes into it during this inspection.

    4. Install the P CON MAIN fuse.

    5. Connect the transmission control ECU assembly connector.


    OK

    CHECK AND REPAIR POWER SOURCE CIRCUIT

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR