MULTI-MODE MANUAL TRANSAXLE SYSTEM, Diagnostic DTC:P0900

DTC Code DTC Name
P0900 Clutch Actuator Circuit

DESCRIPTION

The clutch actuator is operated by the TCM and engages and disengages the clutch by the clutch master cylinder movement of the clutch actuator. An electric motor moves the clutch master cylinder, and the clutch stroke sensor, which is mounted on the clutch actuator assembly, detects the clutch master cylinder position. The TCM monitors the electrical current and clutch motor output terminal voltage, and detects malfunctions in the clutch motor circuit.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

Memory

P0900

Clutch Actuator Circuit

The TCM detects the following conditions:

(1-trip detection logic)

  1. Clutch motor is not energized.

  2. Voltage of clutch motor terminal (MCL+ or MCL-) 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. Clutch motor is energized.

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

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

The TCM detects the following conditions:

(1-trip detection logic)

  1. Clutch motor is not energized.

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

  • Clutch actuator assembly (clutch motor)

  • Open or short in clutch motor circuit

  • TCM

Does not come on

Comes on

DTC stored

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

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

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

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

WIRING DIAGRAM

C279536E01

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 (MCL 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. INSPECT CLUTCH ACTUATOR CIRCUIT

    Click here

    Result

    Proceed to

    OK

    NG
    NG

    CHECK TERMINAL CONDITION (CLUTCH ACTUATOR)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 (CLUTCH ACTUATOR)

    Click here

    Result

    Proceed to

    OK

    NG
    NG

    CONNECT CORRECTLY

    OK

  6. CHECK HARNESS AND CONNECTOR (TCM - CLUTCH ACTUATOR ASSEMBLY)

    Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. INSPECT CLUTCH ACTUATOR ASSEMBLY

    Click here

    Result

    Proceed to

    OK

    NG
    OK

    CHECK INTERMITTENT PROBLEMS

    Click here

    NG

  8. REPLACE CLUTCH ACTUATOR ASSEMBLY

    1. Replace the clutch actuator assembly.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

    PERFORM INITIALIZATION

    Click here