ELECTRONIC SHIFT LEVER SYSTEM, Diagnostic DTC:C2303

DTC Code DTC Name
C2303 Short in Power Source Relay Circuit

DESCRIPTION

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

DTC No. DTC Detection Condition Trouble Area
C2303 When the P CON MTR relay (transaxle parking lock control relay) is off, voltage of transmission control ECU assembly terminal MUA, MVA and MWA are 6 V or more for 0.064 seconds or more.

  • Transmission control ECU assembly

  • P CON MTR relay (Transaxle parking lock control relay)

  • Wire harness or connector

WIRING DIAGRAM

Refer to the wiring diagram for DTC C2301 Click here.

INSPECTION PROCEDURE

Note

It may not be possible to clear the following DTCs using the intelligent tester: DTC 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). In such cases, disconnect the P CON MAIN fuse and wait for at least 60 seconds to clear the DTCs after the repair.

PROCEDURE


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


    1. Disconnect connector D2 from the shift control actuator assembly.

    2. A003VBZE05
      Text in Illustration
      *a

      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

    INSPECT P CON MTR RELAY (TRANSAXLE PARKING LOCK CONTROL RELAY) Click here

    OK

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


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

    2. Disconnect connector D2 from the shift control actuator assembly.

    3. A003Z77E14
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Transmission Control ECU Assembly)
      *b

      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
      A21-5 (MUA) or D2-1 (MUA) - Body ground and other terminals Power switch off 10 kΩ or higher
      A21-2 (MVA) or D2-6 (MVA) - Body ground and other terminals Power switch off 10 kΩ or higher
      A21-1 (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. INSPECT P CON MTR RELAY (TRANSAXLE PARKING LOCK CONTROL RELAY)


    1. A003YLDE01

      Remove the P CON MTR relay (transaxle parking lock control relay) from the engine room junction block assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 - 5 Auxiliary battery voltage is not applied between terminals 1 and 2 10 kΩ or higher
      Auxiliary battery voltage is applied between terminals 1 and 2 Below 1 Ω

    3. Reinstall the P CON MTR relay (transaxle parking lock control relay).


    NG

    REPLACE P CON MTR RELAY (TRANSAXLE PARKING LOCK CONTROL RELAY)

    OK

  4. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL ECU ASSEMBLY - P CON MTR RELAY)


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

    2. Remove the P CON MTR relay (transaxle parking lock control relay) from the engine room junction block assembly.

    3. A003W1WE06
      Text in Illustration
      *a

      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
      A21-23 (BMA) - Body ground and other terminals Power switch off 10 kΩ or higher

    4. Reinstall the P CON MTR relay (transaxle parking lock control relay).

    5. Connect the transmission control ECU assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (SHIFT CONTROL ACTUATOR ASSEMBLY - P CON MTR RELAY)


    1. Disconnect connector D2 from the shift control actuator assembly.

    2. Remove the P CON MTR relay (transaxle parking lock control relay) from the engine room junction block assembly.

    3. A003VBZE06
      Text in Illustration
      *a

      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. Reinstall the P CON MTR relay (transaxle parking lock control relay).

    5. Connect the shift control actuator assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here