DTC    C2303    Short in Power Source Relay Circuit

for Preparation Click here


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.
  1. Transmission control ECU assembly
  2. P CON MTR relay (Transaxle parking lock control relay)
  3. Wire harness or connector

WIRING DIAGRAM

Refer to the wiring diagram for DTC C2301 (Click here).

INSPECTION PROCEDURE

NOTICE:
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.

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

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



    C208991E05

  1. 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

    Text in Illustration 
    *a
    		Front view of wire harness connector
    (to Shift Control Actuator Assembly)

  1. Connect the shift control actuator assembly connector.



NG
Go to step 3
OK


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

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

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



    C210299E14

  1. 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

    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)

  1. Connect the shift control actuator assembly connector.

  1. 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)


    C225994E01

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

  1. 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

  1. 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.

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



    C208986E06

  1. 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

    Text in Illustration 
    *a
    		Front view of wire harness connector
    (to Transmission Control ECU Assembly)

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

  1. 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.

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



    C208991E06

  1. 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

    Text in Illustration 
    *a
    		Front view of wire harness connector
    (to Shift Control Actuator Assembly)

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

  1. Connect the shift control actuator assembly connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

CHECK FOR INTERMITTENT PROBLEMS (Click here)