MULTI-MODE MANUAL TRANSAXLE SYSTEM, Diagnostic DTC:P0920

DTC Code DTC Name
P0920 Gear Shift Forward Actuator Circuit

DESCRIPTION

C239986C02

*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

  • *1: A short between the shift motor circuit and the body ground is suspected.

  • *2: A short between the shift motor circuit and the +B circuit is suspected.

  • *3: An open in the shift motor circuit is suspected. When the motor current does not flow to the ECU terminals despite the ECU ordering the shift motor to operate, the ECU stores this DTC.

  • *4: An open in the shift motor circuit is suspected. When the difference is more than the threshold despite the ECU not ordering the shift motor to operate, the ECU stores this DTC.

WIRING DIAGRAM

C279536E03

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.

Table 1. After Installation

Part Installed

Operation Order

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

  • Shift and select actuator

  • Shift stroke sensor

  • Select stroke sensor

1. Initialization and learning of multi-mode manual transaxle system

Click here

2. Synchronization position calibration

Click here

  • Clutch stroke sensor

1. Initialization and learning of multi-mode manual transaxle system

Click here

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)

    Click here

    Result

    Proceed to

    OK

    NG
    OK

    CHECK INTERMITTENT PROBLEMS

    Click here

    NG

  2. CHECK TERMINAL CONDITION (TCM)

    Click here

    Result

    Proceed to

    OK

    NG
    NG

    CONNECT CORRECTLY

    OK

  3. CHECK SHIFT MOTOR CIRCUIT

    Click here

    Result

    Proceed to

    OK

    NG
    NG

    CHECK TERMINAL CONDITION (SHIFT MOTOR)Click here

    OK

  4. REPLACE TCM

    1. Replace the TCM.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

    PERFORM INITIALIZATION

    Click here

  5. CHECK TERMINAL CONDITION (SHIFT MOTOR)

    Click here

    Result

    Proceed to

    OK

    NG
    NG

    CONNECT CORRECTLY

    OK

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

    Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

    Click here

    Result

    Proceed to

    OK

    NG
    OK

    CHECK INTERMITTENT PROBLEMS

    Click here

    NG

  8. REPLACE SHIFT AND SELECT ACTUATOR ASSEMBLY

    1. Replace the shift and select actuator assembly.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

    PERFORM INITIALIZATION

    Click here