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 of the transmission control ECU. 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. Detection Item DTC Detection Condition Trouble Area Warning Indicate Memory
C2310 Open or Short Circuit in Battery Circuit With the power switch on (IG) (IG circuit malfunction is not detected), voltage at 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

  • Master Warning Light


    • Comes on


  • Multi-information Display Error Message


    • Comes on

 DTC stored

WIRING DIAGRAM

A01G3DFE01
*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 No. 1 engine room relay block and No. 1 junction block assembly.

    2. A01G3EQC01
      *1 No. 1 Engine Room Relay Block and No. 1 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. Reinstall the P-CON MAIN fuse.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FUSE (P-CON MAIN)

    OK

  2. READ VALUE USING GTS (BATTERY VOLTAGE VALUE)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

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


      Body Electrical > Transmission Control > Data List
      Tester Display
      Battery Voltage Value

    4. Read the Data List displayed on the GTS.

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

    5. Turn the power switch off.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE TRANSMISSION CONTROL ECU ASSEMBLY for LHD: Click here
    REPLACE TRANSMISSION CONTROL ECU ASSEMBLY for RHD: Click here

    NG

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


    1. Disconnect the A131 transmission control ECU assembly connector.

    2. Disconnect the P-CON MAIN fuse from the No. 1 engine room relay block and No. 1 junction block assembly.

    3. A01G2WXC01
      *1 No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
      *a

      Front view of wire harness connector

      (to Transmission Control ECU Assembly)
      *b P-CON MAIN Fuse Connector of No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      A131-15 (BATT) - 2 (P-CON MAIN fuse) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A131-15 (BATT) or 2 (P-CON MAIN fuse) - Body ground and other terminals Power switch off 10 kΩ or higher

      Note

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

    4. Reinstall the P-CON MAIN fuse.

    5. Reconnect the A131 transmission control ECU assembly connector.

      Result
      Proceed to
      OK
      NG

    OK

    CHECK AND REPAIR POWER SOURCE CIRCUIT

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR