ELECTRONIC SHIFT LEVER SYSTEM, Diagnostic DTC:P1C8949

DTC Code DTC Name
P1C8949 Park Pawl Motor Control System (Initially Drive) Internal Electronic Failure

DESCRIPTION

The shift control actuator assembly consists of a parking lock motor and rotation angle sensor.

The hybrid vehicle control ECU receives a P position switch signal from the P position switch (transmission shift main switch) and operates the parking lock motor through current control to engage and release the parking lock. The hybrid vehicle control ECU detects the motor rotation angle through signals from the rotation angle sensor and controls the timing of application of current to the coils of the parking lock motor.

If the hybrid vehicle control ECU detects a malfunction in the actuator system, it stores this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Memory
P1C8949 Park Pawl Motor Control System (Initially Drive) Internal Electronic Failure Malfunction of the power system, such as when the auxiliary battery is discharged, an open or short occurs in the P-CON relay, shift control actuator assembly (parking lock motor or rotation angle sensor) or wire harness, or an internal malfunction of the shift control actuator assembly (parking lock motor or rotation angle sensor).

  • Hybrid vehicle control ECU

  • Auxiliary battery

  • Shift control actuator assembly

  • Wire harness or connector

  • Master Warning Light


    • Comes on


  • Multi-information Display Error Message


    • Displayed

 DTC stored

CONFIRMATION DRIVING PATTERN

Tech Tips

After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

Click here


  1. Turn the power switch on (IG).

  2. With the brake pedal depressed, select neutral (N).

  3. Push the P position switch (transmission shift main switch).

WIRING DIAGRAM

B004QKJE04

CAUTION / NOTICE / HINT

Note


  • Do not remove/install the auxiliary battery or disconnect the cable from the negative (-) auxiliary battery terminal before instructed.

  • 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

PROCEDURE


  1. CHECK DTC OUTPUT (HYBRID CONTROL)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.


      Powertrain > Hybrid Control > Trouble Codes

    4. Check if DTCs are output.

      Result
      Result Proceed to
      None of the DTCs in the table below are output. A
      Any of the DTCs in the table below are output. B
      Priority Relevant DTC
      1 P060647 Hybrid/EV Powertrain Control Module Processor Watchdog / Safety MCU Failure
      P060A29 Hybrid/EV Powertrain Control Module Monitoring Processor Signal Invalid
      P060A44 Hybrid/EV Powertrain Control Module Monitoring Processor Data Memory Failure
      P060A45 Hybrid/EV Powertrain Control Module Monitoring Processor Program Memory Failure
      P060A47 Hybrid/EV Powertrain Control Module Monitoring Processor Watchdog / Safety MCU Failure
      P060A49 Hybrid/EV Powertrain Control Module Monitoring Processor Internal Electronic Failure
      P06881F ECM/PCM Power Relay Sense Circuit Intermittent
      2 P1C8F14 Park Pawl Motor Phase U Circuit Short to Ground or Open
      P1C9414 Park Pawl Motor Phase V Circuit Short to Ground or Open
      P1C9914 Park Pawl Motor Phase W Circuit Short to Ground or Open

      Tech Tips

      Perform troubleshooting for higher priority DTCs first.

    5. Turn the power switch off.


    B

    GO TO DTC CHART (HYBRID CONTROL SYSTEM, ELECTRONIC SHIFT LEVER SYSTEM) for Hybrid Control System: Click here
    GO TO DTC CHART (HYBRID CONTROL SYSTEM, ELECTRONIC SHIFT LEVER SYSTEM) for Electronic Shift Lever System: Click here

    A

  2. CHECK FREEZE FRAME DATA (HYBRID CONTROL)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

      Tech Tips

      Do not turn the power switch on (READY).

    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.


      Powertrain > Hybrid Control > DTC(P1C8949) > Freeze Frame Data
      Tester Display
      BATT Voltage for Transmission Control System

    4. Read the freeze frame data of DTC P1C8949.

      Result
      Result Proceed to
      The value of BATT Voltage for Transmission Control System is 9 V or more A
      The value of BATT Voltage for Transmission Control System is less than 9 V B

    5. Turn the power switch off.


    B

    REPLACE AUXILIARY BATTERY Click here

    A

  3. CLEAR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

    4. Clear the DTCs.


      Powertrain > Hybrid Control > Clear DTCs

    5. Disconnect the GTS from the DLC3.

    6. Turn the power switch off.

    7. Leave the vehicle as is for 60 seconds or more.

      Note


      • Do not connect the GTS.

      • Do not depress brake pedal.

      • Do not open/close any of the doors.

      Result
      Proceed to
      NEXT

    NEXT

  4. CHARGE AUXILIARY BATTERY


    1. Charge the auxiliary battery.

      Result
      Proceed to
      NEXT

    NEXT

  5. CHECK DTC OUTPUT (SIMULATION TEST)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

      Tech Tips

      Do not turn the power switch on (READY).

    3. Depress the brake pedal and select neutral (N).

    4. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

    5. Check if DTCs are output.


      Powertrain > Hybrid Control > Trouble Codes
      Result
      Result Proceed to
      P1C8949 is output A
      P1C8949 is not output B

    6. Turn the power switch off.


    B

    END (AUXILIARY BATTERY WAS INSUFFICIENTLY CHARGED)

    A

  6. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - SHIFT CONTROL ACTUATOR ASSEMBLY)


    1. Disconnect the A50 hybrid vehicle control ECU connector.

    2. Disconnect the C2 shift control actuator assembly connector.

    3. B004QL5C03
      *a

      Front view of wire harness connector

      (to Hybrid Vehicle Control ECU)
      *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 Open)
      Tester Connection Condition Specified Condition
      A50-41 (VC) - C2-9 (RVC) Power switch off Below 1 Ω
      A50-16 (RA) - C2-3 (RA) Power switch off Below 1 Ω
      A50-29 (RB) - C2-5 (RB) Power switch off Below 1 Ω
      A50-44 (E2) - C2-8 (RE2) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A50-41 (VC) or C2-9 (RVC) - Body ground and other terminals Power switch off 10 kΩ or higher
      A50-16 (RA) or C2-3 (RA) - Body ground and other terminals Power switch off 10 kΩ or higher
      A50-29 (RB) or C2-5 (RB) - Body ground and other terminals Power switch off 10 kΩ or higher
      A50-44 (E2) or C2-8 (RE2) - Body ground and other terminals Power switch off 10 kΩ or higher

    4. Reconnect the C2 shift control actuator assembly connector.

    5. Reconnect the A50 hybrid vehicle control ECU connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK SHIFT CONTROL ACTUATOR ASSEMBLY (ROTATION ANGLE SENSOR)


    1. Disconnect the A50 hybrid vehicle control ECU connector.

    2. B004QOYC05
      *a

      Front view of wire harness connector

      (to Hybrid Vehicle Control ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A50-41 (VC) - A50-16 (RA) Power switch off 10 kΩ or higher
      A50-41 (VC) - A50-29 (RB) Power switch off 10 kΩ or higher
      A50-41 (VC) - A50-44 (E2) Power switch off 590 to 670 Ω
      A50-16 (RA) - A50-29 (RB) Power switch off 10 kΩ or higher
      A50-16 (RA) - A50-44 (E2) Power switch off 10 kΩ or higher
      A50-29 (RB) - A50-44 (E2) Power switch off 10 kΩ or higher

    3. Reconnect the A50 hybrid vehicle control ECU connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SHIFT CONTROL ACTUATOR ASSEMBLY Click here

    OK

  8. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - BODY GROUND)


    1. Disconnect the F2 hybrid vehicle control ECU connector.

    2. B004OXHC12
      *a

      Front view of wire harness connector

      (to Hybrid Vehicle Control ECU)

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      F2-12 (E01) - Body ground Power switch off Below 1 Ω
      F2-11 (E02) - Body ground Power switch off Below 1 Ω
      F2-10 (E03) - Body ground Power switch off Below 1 Ω

    3. Reconnect the F2 hybrid vehicle control ECU connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. CHECK SHIFT CONTROL ACTUATOR ASSEMBLY


    1. Check that the parking brake is applied.

    2. Disconnect the C2 shift control actuator assembly connector.

    3. Remove the 3 shift control actuator bolts.

      Tech Tips

      Click here

    4. Slightly pull the shift control actuator assembly from the hybrid vehicle transaxle assembly.

    5. Reconnect the C2 shift control actuator assembly connector.

    6. Release the brake pedal and turn the power switch on (ACC).

      Note

      The shift control actuator assembly may operate if the power switch is turned on (IG) or (READY). Do not turn the power switch on (IG) or (READY) during this inspection to prevent the shift control actuator assembly from operating while in contact with the splines.

    7. B004OGP

      Using a screwdriver with its tip wrapped with protective tape or a piece of cloth, rotate the shaft.

      Note


      • During this inspection, make sure to use a screwdriver with its tip wrapped with protective tape or a piece of cloth to prevent the splines of the actuator from being damaged.

      • The shift control actuator assembly cannot be disassembled.


      1. Confirm that the shaft of the shift control actuator assembly rotates smoothly.

        OK
        The shaft of the shift control actuator assembly rotates smoothly.

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

        Note

        When measuring the voltage, turn the shift control actuator assembly slowly.

        B004QKMC02
        *a

        Component with harness connected

        (Hybrid Vehicle Control ECU)

        		 *b Output Waveform while Splines of Shift Control Actuator Assembly being Rotated (Example)
        Standard Voltage
        Tester Connection Condition Specified Condition
        A50-16 (RA) - A50-44 (E2) Power switch on (ACC), shaft of shift control actuator assembly being rotated 0 to 1.5 V ←→ 4 to 5.5 V
        A50-29 (RB) - A50-44 (E2) Power switch on (ACC), shaft of shift control actuator assembly being rotated 0 to 1.5 V ←→ 4 to 5.5 V

    8. Turn the power switch off.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    NG

    REPLACE SHIFT CONTROL ACTUATOR ASSEMBLY Click here