MULTI-MODE MANUAL TRANSAXLE SYSTEM, Diagnostic DTC:P0920

DTC Code DTC Name
P0920 Gear Shift Forward Actuator Circuit

DESCRIPTION

A01TB7UC02
*a Shift and Select Actuator Operation
*b Shift Direction
*c Select Direction

The shift and select actuator is operated by the TCM and changes the transaxle gear by the shift and select lever shaft movement. An electric motor (shift motor) moves the shift and select lever shaft in the shift direction, and the shift stroke sensor, which is mounted on the shift and select actuator assembly, detects the shift position. The TCM monitors the electrical current and shift motor output terminal voltage, and detects malfunctions in the shift motor circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate Memory
P0920 Gear Shift Forward Actuator Circuit

The TCM detects the following conditions:

(1-trip detection logic)


  1. Shift motor is not energized.

  2. Voltage of shift motor terminal (MSF+ or MSF-) is less than threshold*1, or more than threshold*2 for 0.5 seconds.

The TCM detects the following conditions:

(1-trip detection logic)


  1. Shift motor is energized

  2. Target shift motor current is more than 5 A.

  3. Actual shift motor current is less than 1 A*3.

The TCM detects the following conditions:

(1-trip detection logic)


  1. Shift motor is not energized.

  2. Difference between maximum and minimum voltages of shift motor terminal (MSF+ or MSF-) is more than threshold*4 for 0.5 seconds.

  • Shift and select actuator assembly (shift motor)

  • Wire harness or connector

  • TCM

 Does not come on Comes on DTC stored

WIRING DIAGRAM

A01T8UFE03
*a Shift and Select Actuator Assembly (Shift Motor)

CAUTION / NOTICE / HINT

Note

When installing parts related to the multi-mode manual transaxle system, perform the initialization and learning and synchronization position calibration procedures. In addition, the required operations differ according to the parts to be installed. Proceed with the operation in the order shown in the table below.

After Installation
Part Installed Part Installed See Procedure

  • Transaxle assembly

  • Transaxle parts (inside gear box)

  • TCM

  • Clutch actuator assembly

  • Clutch disc and clutch cover

  • Clutch release with bearing cylinder assembly

  • Flywheel

  • Crankshaft

1. Initialization of multi-mode manual transaxle system

[Tester display: Initialization of ECU]

Click here

2. Learning of multi-mode manual transaxle system
3. Synchronization position calibration

  • Shift and select actuator

  • Shift stroke sensor

  • Select stroke sensor

1. Initialization of multi-mode manual transaxle system

[Tester display: Initialization of transmission]
2. Learning of multi-mode manual transaxle system
3. Synchronization position calibration

  • Clutch stroke sensor

1. Initialization of multi-mode manual transaxle system

[Tester display: Initialization of clutch]
2. Learning of multi-mode manual transaxle system

If the sensor or actuator is installed without the initialization and learning procedures, it may cause driving performance degradation or system component breakage.

PROCEDURE


  1. INSPECT TCM (MSF TERMINAL VOLTAGE)

    Result
    Proceed to
    OK
    NG

    1. Turn the ignition switch to ON.

    2. A01TD8TC11
      *a

      Component with harness connected

      (TCM)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A104-4 (MSF+) - Body ground Ignition switch ON 4.0 to 7.0 V
      A104-3 (MSF-) - Body ground Ignition switch ON 4.0 to 7.0 V

    3. Turn the ignition switch off.

      Result
      Proceed to
      OK
      NG

    OK

    CHECK INTERMITTENT PROBLEMS Click here

    NG

  2. CHECK TERMINAL CONDITION (TCM)

    Result
    Proceed to
    OK
    NG

    1. Disconnect the TCM connector.

    2. Check the connections of the TCM connector.

      OK
      The TCM and wire harness connectors and connector terminals are connected securely and are not bent, rusted, or damaged.
      Result
      Proceed to
      OK
      NG

    NG

    CONNECT CORRECTLY

    OK

  3. CHECK SHIFT MOTOR CIRCUIT

    Result
    Proceed to
    OK
    NG

    1. A01TB5RC07
      *a

      Front view of wire harness connector

      (to TCM)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A104-4 (MSF+) - A104-3 (MSF-) Always Below 10 Ω
      A104-4 (MSF+) - Body ground Always 10 kΩ or higher
      A104-3 (MSF-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    CHECK TERMINAL CONDITION (SHIFT MOTOR) Click here

    OK

  4. REPLACE TCM


    1. Replace the TCM.

      for LHD: Click here

      for RHD: Click here

      Result
      Proceed to
      NEXT

    NEXT

  5. PERFORM INITIALIZATION


    1. Perform the initialization and learning procedure.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    END

  6. CHECK TERMINAL CONDITION (SHIFT MOTOR)

    Result
    Proceed to
    OK
    NG

    1. Disconnect the shift motor connector.

    2. Check the connections of the shift motor connector.

      OK
      The shift motor and wire harness connectors and connector terminals are connected securely and are not bent, rusted, or damaged.
      Result
      Proceed to
      OK
      NG

    NG

    CONNECT CORRECTLY

    OK

  7. CHECK HARNESS AND CONNECTOR (TCM - SHIFT MOTOR)

    Result
    Proceed to
    OK
    NG

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A104-4 (MSF+) - B139-2 (MSF+) Always Below 1 Ω
      A104-3 (MSF-) - B139-1 (MSF-) Always Below 1 Ω
      A104-4 (MSF+) or B139-2 (MSF+) - Body ground Always 10 kΩ or higher
      A104-3 (MSF-) or B139-1 (MSF-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. INSPECT SHIFT AND SELECT ACTUATOR ASSEMBLY (SHIFT MOTOR)

    Result
    Proceed to
    OK
    NG

    1. A01T9GYC02
      *a

      Component without harness connected

      (Shift and Select Actuator Assembly (Shift Motor))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (MSF-) - 2 (MSF+) Always Below 10 Ω
      1 (MSF-) - Body ground Always 10 kΩ or higher
      2 (MSF+) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    CHECK INTERMITTENT PROBLEMS Click here

    NG

  9. REPLACE SHIFT AND SELECT ACTUATOR ASSEMBLY


    1. Replace the shift and select actuator assembly.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  10. PERFORM INITIALIZATION


    1. Perform the initialization and learning procedure.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    END