DTC    C2304    Open or Short Circuit in U Phase

DTC    C2305    Open or Short Circuit in V Phase

DTC    C2306    Open or Short Circuit in W Phase

for Preparation Click here


DESCRIPTION

The shift control actuator assembly consists of a parking lock motor and rotation angle sensor. The transmission control ECU assembly receives a P position switch signal from the power management control ECU (HV CPU) and activates the parking lock motor by controlling current, causing the parking lock mechanism to switch. The transmission control ECU assembly stores these DTCs when it detects a malfunction in the parking lock motor system.

DTC No.
DTC Detection Condition
Trouble Area
C2304
With the power switch on (IG) (auxiliary battery voltage is 8 V or more), voltage of transmission control ECU assembly terminal MUA is 6 V or less for 1 second or more.
  1. Auxiliary battery
  2. Transmission control ECU assembly
  3. Shift control actuator assembly
  4. P CON MTR relay (Transaxle parking lock control relay)
  5. Wire harness or connector
C2305
With the power switch on (IG) (auxiliary battery voltage is 8 V or more), voltage of transmission control ECU assembly terminal MVA is 6 V or less for 1 second or more.
C2306
With the power switch on (IG) (auxiliary battery voltage is 8 V or more), voltage of transmission control ECU assembly terminal MWA is 6 V or less for 1 second or more.

WIRING DIAGRAM

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

INSPECTION PROCEDURE

NOTICE:
  1. Do not remove/install the auxiliary battery or disconnect the cable from the negative (-) auxiliary battery terminal before instructed.
  2. Do not disconnect the connectors before instructed.
  3. 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.
  4. After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work (Click here).

1.CHECK DTC OUTPUT (TRANSMISSION CONTROL)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Enter the following menus: Chassis / Transmission Control / DTC.

  1. Check if DTCs are output.

    Result:
    Result
    		Proceed to
    C2304, C2305 and C2306 are detected simultaneously
    		A
    One of C2304, C2305 and C2306 is detected
    		B

    HINT:
    1. If DTCs C2304, 2305 and 2306 are stored at the same time, there may be a malfunction in the parking lock motor (BMA signal) power source circuit.
    2. If DTC C2304, 2305 or 2306 is stored individually, there may be a malfunction in the parking lock motor (MUA, MVA or MWA signal) circuits.

  1. Turn the power switch off.



B
Go to step 6
A


2.CHECK FREEZE FRAME DATA

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Enter the following menus: Chassis / Transmission Control / DTC.

  1. Read the freeze frame data of C2304, 2305 and 2306.

    Result:
    Result
    		Proceed to
    IG (+B) voltage is 9 V or more
    		A
    IG (+B) voltage is less than 9 V
    		B

  1. Turn the power switch off.



B
REPLACE AUXILIARY BATTERY (Click here)
A


3.CLEAR DTC

  1. Turn the power switch on (IG).

  1. Enter the following menus: Chassis / Transmission Control / DTC.

  1. Read and record the DTCs and freeze frame data.

  1. Turn the power switch off.

  1. Disconnect the P CON MAIN fuse and wait for at least 60 seconds.

  1. Check for DTCs again to see if the DTCs are cleared.


NEXT


4.CHARGE AUXILIARY BATTERY

  1. Charge the auxiliary battery.


NEXT


5.CHECK DTC OUTPUT (SIMULATION TEST)

  1. Connect the intelligent tester to the DLC3.

  1. Release the brake pedal and turn the power switch on (IG).

    HINT:
    Do not turn the power switch on (READY).

  1. Depress the brake pedal and move the shift lever to select neutral (N).

  1. Enter the following menus: Chassis / Transmission Control / DTC.

  1. Check if DTCs are output.

    Result:
    Result
    		Proceed to
    C2304, 2305 or 2306 is output
    		A
    DTC is not output.
    		B

  1. Turn the power switch off.



B
END (AUXILIARY BATTERY WAS INSUFFICIENTLY CHARGED)
A


6.READ VALUE USING INTELLIGENT TESTER (U, V, W VOLTAGE)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Enter the following menus: Chassis / Transmission Control / Data List / U Phase Voltage Value, V Phase Voltage Value, W Phase Voltage Value.

  1. Read the data list displayed on the intelligent tester.

    Result:
    Tester Display
    		Switch Condition
    		Specified Condition
    U Phase Voltage Value
    		Power switch on (IG)
    		9 to 14 V
    V Phase Voltage Value
    		Power switch on (IG)
    		9 to 14 V
    W Phase Voltage Value
    		Power switch on (IG)
    		9 to 14 V

  1. Turn the power switch off.



NG
Go to step 7
OK

REPLACE TRANSMISSION CONTROL ECU ASSEMBLY (Click here)  

7.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 Open):
    Tester Connection
    		Switch Condition
    		Specified Condition
    A21-5 (MUA) - D2-1 (MUA)
    		Power switch off
    		Below 1 Ω
    A21-2 (MVA) - D2-6 (MVA)
    		Power switch off
    		Below 1 Ω
    A21-1 (MWA) - D2-7 (MWA)
    		Power switch off
    		Below 1 Ω

    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


8.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.



    C234238E02

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Switch Condition
    		Specified Condition
    D2-2 (BMA) - 5 (P CON MTR relay)
    		Power switch off
    		Below 1 Ω

    Standard Resistance (Check for Short):
    Tester Connection
    		Switch Condition
    		Specified Condition
    D2-2 (BMA) or 5 (P CON MTR relay) - 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 Shift Control Actuator Assembly)
    *b
    		P CON MTR Relay (transaxle parking lock control relay) Connector of Engine Room Junction Block 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


9.CHECK SHIFT CONTROL ACTUATOR ASSEMBLY

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

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



    C234239E03

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Switch Condition
    		Specified Condition
    A21-5 (MUA) - 5 (P CON MTR relay)
    		Power switch off
    		Below 50 Ω
    A21-2 (MVA) - 5 (P CON MTR relay)
    		Power switch off
    		Below 50 Ω
    A21-1 (MWA) - 5 (P CON MTR relay)
    		Power switch off
    		Below 50 Ω

    Standard Resistance (Check for Short):
    Tester Connection
    		Switch Condition
    		Specified Condition
    A21-5 (MUA) - Body ground
    		Power switch off
    		10 kΩ or higher
    A21-2 (MVA) - Body ground
    		Power switch off
    		10 kΩ or higher
    A21-1 (MWA) - Body ground
    		Power switch off
    		10 kΩ or higher
    5 (P CON MTR relay) - Body ground
    		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 MTR Relay (transaxle parking lock control relay) Connector of Engine Room Junction Block Assembly

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

  1. Connect the transmission control ECU assembly connector.



NG
REPLACE SHIFT CONTROL ACTUATOR ASSEMBLY (Click here)
OK


10.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


11.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.



    C234239E04

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Switch Condition
    		Specified Condition
    A21-23 (BMA) - 2 (P CON MTR relay)
    		Power switch off
    		Below 1 Ω

    Standard Resistance (Check for Short):
    Tester Connection
    		Switch Condition
    		Specified Condition
    A21-23 (BMA) or 2 (P CON MTR relay) - 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 MTR Relay (transaxle parking lock control relay) Connector of Engine Room Junction Block 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


12.CHECK HARNESS AND CONNECTOR (P CON MTR RELAY - BODY GROUND)

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



    C234240E02

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Switch Condition
    		Specified Condition
    1 (P CON MTR relay) - Body ground
    		Power switch off
    		Below 1 Ω

    Text in Illustration 
    *1
    		Engine Room Junction Block Assembly
    *a
    		P CON MTR Relay (transaxle parking lock control relay) Connector of Engine Room Junction Block Assembly

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



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


13.CHECK HARNESS AND CONNECTOR (P CON MTR RELAY POWER SOURCE CIRCUIT)

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



    C234240E02

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    3 (P CON MTR relay) - Body ground
    		Always
    		9 to 14 V

    Text in Illustration 
    *1
    		Engine Room Junction Block Assembly
    *a
    		P CON MTR Relay (transaxle parking lock control relay) Connector of Engine Room Junction Block Assembly

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



NG
CHECK AND REPAIR POWER SOURCE CIRCUIT
OK

REPLACE TRANSMISSION CONTROL ECU ASSEMBLY (Click here)