ELECTRONIC SHIFT LEVER SYSTEM, Diagnostic DTC:C2303

DTC Code DTC Name
C2303 Short in Power Source Relay Circuit

DESCRIPTION

The integration relay is activated by output voltage from the transmission control ECU and supplies power to the shift control actuator (parking lock motor). The transmission control ECU outputs this DTC when it detects a malfunction in the integration relay.

DTC No. DTC Detection Condition Trouble Area
C2303 When the integration relay is off, voltage of transmission control ECU terminal MUA, MVA and MWA are 6 V or more for 0.064 seconds or more.

  • Transmission control ECU assembly

  • Integration relay

  • Wire harness or connector

WIRING DIAGRAM

A01J9PFE01

INSPECTION PROCEDURE

Note

It is not possible to clear the following DTCs using the intelligent tester: DTCs C2300 (Actuator System Malfunction), C2301 (Shift Changing Time Malfunction), C2303 (Short in Power Source Relay Circuit), C2304 (Open or Short Circuit in U Phase), C2305 (Open or Short Circuit in V Phase), C2306 (Open or Short Circuit in W Phase), C2307 (Power Supply) and C2309 (Open in B+ Circuit). After the repair, it is necessary to disconnect the P CON MAIN fuse and wait for at least 60 seconds to clear the DTCs.

PROCEDURE


  1. CHECK SHIFT CONTROL ACTUATOR ASSEMBLY (SHIFT CONTROL ACTUATOR ASSEMBLY POWER SOURCE CIRCUIT)


    1. Disconnect the D2 shift control actuator assembly connector.

    2. A01J9Q7E01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Shift Control Actuator Assembly)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      D2-2 (BMA) - Body ground Power switch off Below 1 V

    3. Connect the shift control actuator assembly connector.


    NG

    CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL ECU ASSEMBLY - INTEGRATION RELAY) Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL ECU ASSEMBLY - SHIFT CONTROL ACTUATOR)


    1. Disconnect the A23 transmission control ECU assembly connector.

    2. Disconnect the D2 shift control actuator assembly connector.

    3. A01JAMME02
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Transmission Control ECU Assembly)
      *2

      Front view of wire harness connector

      (to Shift Control Actuator Assembly)

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

      Standard Resistance (Check for Short)
      Tester Connection Switch Condition Specified Condition
      A23-5 (MUA) or D2-1 (MUA) - Body ground and other terminals Power switch off 10 kΩ or higher
      A23-2 (MVA) or D2-6 (MVA) - Body ground and other terminals Power switch off 10 kΩ or higher
      A23-1 (MWA) or D2-7 (MWA) - Body ground and other terminals Power switch off 10 kΩ or higher

    4. Connect the shift control actuator assembly connector.

    5. Connect the transmission control ECU assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE TRANSMISSION CONTROL ECU ASSEMBLY Click here

  3. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL ECU ASSEMBLY - INTEGRATION RELAY)


    1. Disconnect the A23 transmission control ECU assembly connector.

    2. Disconnect the 1G integration relay connector.

    3. A01J8U1E01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Transmission Control ECU Assembly)

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

      Standard Resistance (Check for Short)
      Tester Connection Switch Condition Specified Condition
      A23-23 (BMA) - Body ground and other terminals Power switch off 10 kΩ or higher

    4. Connect the integration relay connector.

    5. Connect the transmission control ECU assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (SHIFT CONTROL ACTUATOR ASSEMBLY - INTEGRATION RELAY)


    1. Disconnect the D2 shift control actuator assembly connector.

    2. Disconnect the 1H integration relay connector.

    3. A01J9Q7E01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Shift Control Actuator Assembly)

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

      Standard Resistance (Check for Short)
      Tester Connection Switch Condition Specified Condition
      D2-2 (BMA) - Body ground and other terminals Power switch off 10 kΩ or higher

    4. Connect the integration relay connector.

    5. Connect the shift control actuator assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE INTEGRATION NO.1 RELAY Click here