CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM(for 8NR-FTS), Diagnostic DTC:P07407F,P099A7F and P27567F

DTC Code DTC Name
P07407F Torque Converter Clutch Actuator Stuck Off
P099A7F Shift Solenoid "G" Control Actuator Stuck Off
P27567F Torque Converter Clutch Pressure Control Solenoid Control Actuator Stuck Off

DESCRIPTION

The ECM uses the shift solenoid valves SC and SL to switch control of the shift solenoid valve SLU between forward and reverse clutch control and lock-up control in response to driving conditions.

Tip:

If DTC P07407F is stored after the engine has stalled, the lock-up shift solenoid valve (shift solenoid valve SL) may be malfunctioning.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P07407F

Torque Converter Clutch Actuator Stuck Off

1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other

  1. DTC Detection Condition 1

  2. The ECM sends a lock-up OFF command and turns the shift solenoid valves SC and SL OFF.

  3. The difference between the engine speed (NE) and input turbine speed (NT) is 25 rpm or less.

  4. 1 second or more

  5. 2-trip detection logic

  1. DTC Detection Condition 2

  2. The ECM turns the shift solenoid valves SC and SL ON.

  3. The difference between the input turbine speed (NT) and primary pulley speed (NIN) is 300 rpm or more.

  4. 1 second or more

  5. 2-trip detection logic

  1. DTC Detection Condition 3

  2. The vehicle is being driven.

  3. The lock-up ON command is sent, but lock-up control is not performed.

  4. 1 second or more

  5. 2-trip detection logic

  • Torque converter assembly

  • Continuously variable transaxle assembly

Comes on

DTC stored

SAE Code:

P0741

P099A7F

Shift Solenoid "G" Control Actuator Stuck Off

1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other

  1. DTC Detection Condition 1

  2. The ECM turns the shift solenoid valves SC and SL OFF.

  3. The difference between the input turbine speed (NT) and primary pulley speed (NIN) is 300 rpm or more.

  4. 1 second or more

  5. 2-trip detection logic

  1. DTC Detection Condition 2

  2. The vehicle is being driven.

  3. The lock-up ON command is sent, but lock-up control is not performed.

  4. 1 second or more

  5. 2-trip detection logic

  1. DTC Detection Condition 3

  2. The ECM sends a lock-up ON command and turns the shift solenoid valves SC and SL ON.

  3. The difference between the engine speed (NE) and input turbine speed (NT) is 25 rpm or less.

  4. 1 second or more

  5. 2-trip detection logic

  • Torque converter assembly

  • Continuously variable transaxle assembly

Comes on

DTC stored

SAE Code:

P075B

P27567F

Torque Converter Clutch Pressure Control Solenoid Control Actuator Stuck Off

1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other

  1. DTC Detection Condition 1

  2. The ECM sends a lock-up ON command, and turns the shift solenoid valves SC and SLU OFF and SL ON.

  3. The difference between the engine speed (NE) and input turbine speed (NT) is 25 rpm or less.

  4. 1 second or more

  5. 2-trip detection logic

  1. DTC Detection Condition 2

  2. The vehicle is being driven.

  3. The lock-up signal is on, but the lock-up is off.

  4. 1 second or more

  5. 2-trip detection logic

  • Torque converter assembly

  • Continuously variable transaxle assembly

Comes on

DTC stored

SAE Code:

P2757

MONITOR DESCRIPTION

When performing lock-up control (on/off) of the torque converter, the ECM compares the transmission revolution sensor (NT) output speed and engine speed (NE) to detect mechanical malfunctions in the shift solenoid valves SL and SC.

If the torque converter does not lock-up while a lock-up ON command is being sent, the ECM detects it as a mechanical malfunction of the shift solenoid valve SLU.

If the difference between the engine speed (NE) and transmission revolution sensor (NT) output speed or transmission revolution sensor (NIN) output speed and transmission revolution sensor (NT) output speed is outside of the threshold, the ECM detects the malfunction, illuminates the MIL and stores a DTC.

CAUTION / NOTICE / HINT

Tip:

After performing repair, clear the DTCs and perform the following procedure to check that DTCs are not output.

  1. Drive the vehicle and confirm the lock-up on and off conditions according to Road Test.

    Click here

  2. Turn the ignition switch off.

  3. Perform step (1) again.

  4. Check for DTCs again.

    Click here

PROCEDURE

  1. CHECK DTC OUTPUT (IN ADDITION TO DTC P07407F, P099A7F AND P27567F)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Transmission / Trouble Codes.

      Powertrain > Transmission > Trouble Codes

    5. Read the DTCs using the GTS.

      Tip:

      If any DTCs other than P07407F, P099A7F or P27567F are output, perform troubleshooting for those DTCs first.

    Result

    Result

    Proceed to

    Only DTC P07407F, P099A7F and/or P27567F is output

    A

    DTC P07407F, P099A7F and/or P27567F and other DTCs are output

    B
    B

    GO TO DTC CHART

    Click hereClick here

    A

  2. CLEAR DTC

    1. Clear the DTCs.

      Powertrain > Transmission > Clear DTCs

    Result

    Proceed to

    NEXT
    NEXT

  3. PERFORM DRIVE TEST

    CAUTION:

    Strictly observe posted speed limits, traffic laws and road conditions when performing a road test.

    Note:

    • This test must be performed after checking and confirming that the engine is normal.

    • Perform this test with the CVT fluid temperature between 50 and 100°C (122 and 212°F).

    • Perform the test with the air conditioning off.

    Tip:

    • Lock-up control will not operate when the CVT fluid temperature is 40°C (104°F) or less and the vehicle speed is 60 km/h (37 mph) or less, or when the CVT fluid temperature is 5°C (41°F) or less.

    • Lock-up control will not operate when the engine coolant temperature is 30°C (86°F) or less.

    • The lock-up OFF vehicle speed may vary depending on the electrical load, and air conditioning and brake operations.

    1. Connect the GTS to the DLC3.

    2. Start the engine.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Transmission / Data List / Engine Speed, NT Sensor Speed, NIN Sensor Speed, Lock Up Status, Solenoid (SL) and Solenoid (SC).

    5. According to the display on the GTS, read the Data List while driving.

      Powertrain > Transmission > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      Engine Speed

      Engine speed

      Min.: 0 rpm

      Max.: 16383 rpm

      680 to 780 rpm: Idling (shift lever in N, engine warmed up and A/C switch off)

      When the crankshaft position sensor is malfunctioning, "Engine Speed" is approximately 0 rpm or varies greatly from the actual engine speed.

      NT Sensor Speed

      Input turbine speed (NT)

      Min.: 0 rpm

      Max.: 12750 rpm

      • Input turbine speed (NT) equal to engine speed (NE): Lock-up ON (After warming up engine)

      • Input turbine speed (NT) nearly equal to engine speed (NE): Lock-up OFF (Idling with shift lever in P or N)

      • 0 rpm: Vehicle stopped with shift lever in R

      Data is displayed in increments of 50 rpm.

      NIN Sensor Speed

      Primary pulley speed (NIN)

      Min.: 0 rpm

      Max.: 12750 rpm

      • 0 rpm: Vehicle stopped

      • Primary pulley speed (NIN) equal to engine speed (NE): Lock-up ON (After warming up engine)

      Data is displayed in increments of 50 rpm.

      Lock Up Status

      Lock-up

      OFF or ON

      • ON: Lock-up operating

      • OFF: Lock-up not operating

      -

      Solenoid (SL)

      Shift solenoid valve SL status

      OFF or ON

      • ON: Lock-up permitted

      • OFF: Lock-up not permitted

      -

      Solenoid (SC)

      Shift solenoid valve SC status

      OFF or ON

      • ON: For 1 second after moving shift lever from P to D or R, or N to D or R

      • ON: Lock-up ON to OFF

      • OFF: Engine idling

      -

      Powertrain > Transmission > Data List

      Tester Display

      Engine Speed

      NT Sensor Speed

      NIN Sensor Speed

      Lock Up Status

      Solenoid (SL)

      Solenoid (SC)

    Result

    Result

    Proceed to

    When Lock Up Status is ON, the value of NT Sensor Speed is lower than the value of Engine Speed.

    A

    When Solenoid (SL) and Solenoid (SC) are OFF, the value of NT Sensor Speed is equal to the value of Engine Speed.

    When Solenoid (SL) and Solenoid (SC) are ON, the difference between the value of NT Sensor Speed and NIN Sensor Speed is large.

    When Lock Up Status is ON, the value of NT Sensor Speed is equal to the value of Engine Speed.

    B

    When Solenoid (SL) and Solenoid (SC) are OFF, the value of NT Sensor Speed is lower than the value of Engine Speed.

    When Solenoid (SL) and Solenoid (SC) are ON, the value of NT Sensor Speed is equal to the value of NIN Sensor Speed.
    B

    CHECK FOR INTERMITTENT PROBLEMS

    Click here

    A

  4. REPLACE CONTINUOUSLY VARIABLE TRANSAXLE ASSEMBLY

    1. Replace the continuously variable transaxle assembly and torque converter assembly.

      Click hereClick here

    Result

    Proceed to

    NEXT
    NEXT

    PERFORM INITIALIZATION

    Click hereClick here