AUTOMATIC TRANSAXLE SYSTEM, Diagnostic DTC:P27567F

DTC Code DTC Name
P27567F Torque Converter Clutch Pressure Control Solenoid Control Actuator Stuck Off

SYSTEM DESCRIPTION

The ECM uses signals from the throttle position sensor, air-flow meter, input speed sensor NT, output speed sensor NC and crankshaft position sensor to monitor the engagement condition of the lock-up clutch.

B007ZSLE01

The ECM compares the engagement condition of the lock-up clutch with the lock-up schedule in the ECM memory to detect mechanical malfunctions of the solenoid (SLU) valve, transmission valve body assembly and torque converter assembly.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P27567F Torque Converter Clutch Pressure Control Solenoid Control Actuator Stuck Off

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


    DTC Detection Condition 1:

  1. Engine coolant temperature is 40°C (104°F) or higher, ATF temperature is -10°C (14°F) or higher and the vehicle is being driven with the shift lever in D (no malfunctions are detected in the solenoid (SL1, SL2, SL3, SL4 and SLU) valves, transmission revolution sensor (NT, NC), coolant temperature sensor, knock control sensor, electronic throttle or CAN communication between engine control unit and transmission control unit)

  2. Both of the following conditions (a) and (b) are met when the ECM commands lock-up ON:


    1. Lock-up does not occur

    2. No. 3 ATF pressure switch is OFF

  3. 3.5 seconds

  4. 2-trip detection logic


    DTC Detection Condition 2:

  1. Engine coolant temperature is 40°C (104°F) or higher, ATF temperature is -10°C (14°F) or higher and the vehicle is being driven with the shift lever in D (no malfunctions are detected in the solenoid (SL1, SL2, SL3, SL4 and SLU) valves, transmission revolution sensor (NT, NC), coolant temperature sensor, knock control sensor, electronic throttle or CAN communication between engine control unit and transmission control unit)

  2. Both of the following conditions (a) and (b) are met when the ECM commands lock-up OFF:


    1. Lock-up occurs

    2. No. 3 ATF pressure switch is ON

  3. 1.8 seconds

  4. 2-trip detection logic

  • Solenoid (SLU) valve remains open or closed

  • Transmission valve body assembly is blocked

  • Torque converter assembly

  • Automatic transaxle assembly (clutch, brake, gear, etc.)

  • Line pressure is too low

 Comes on DTC stored

SAE Code:

P2757

MONITOR DESCRIPTION

Torque converter lock-up is controlled by the ECM based on the input speed sensor NT, output speed sensor NC, engine speed, engine load, engine temperature, vehicle speed, transmission fluid temperature and gear selection signals. The ECM determines the lock-up status of the torque converter assembly by comparing the engine speed signal (NE) to the input speed sensor NT signal and calculates the actual gear by comparing input speed sensor NT signal to the output speed sensor NC signal. When conditions are appropriate, the ECM requests "lock-up" by applying voltage to the solenoid (SLU) valve. When the solenoid (SLU) valve is turned on, pressure is applied to the lock-up relay valve and locks the torque converter clutch.

If the ECM does not detect lock-up after lock-up has been requested or if it detects lock-up when it is not requested, it interprets this as a malfunction of the solenoid (SLU) valve or in lock-up system performance, illuminates the MIL and stores this DTC.

Example:

If any of the following conditions are met, the system judges it as a malfunction.


CAUTION / NOTICE / HINT

Note

Perform registration and/or initialization when parts related to the automatic transaxle are replaced.

Click here

Tech Tips

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


  1. Perform the Lock-up Function inspection in Road Test.

    Click here

  2. Turn the engine switch off.

  3. Perform step (1) again.

  4. Check for DTCs again.

    Click here


  1. ACTIVE TEST

    Tech Tips

    Using the GTS to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.


    1. Warm up the engine.

    2. Turn the engine switch off.

    3. Connect the GTS to the DLC3.

    4. Turn the engine switch on (IG).

    5. Turn the GTS on.

    6. Enter the following menus: Powertrain / Transmission / Active Test / Activate the Lock Up Solenoid.

    7. According to the display on the GTS, perform the Active Test.


      Powertrain > Transmission > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Activate the Lock Up Solenoid Controls the solenoid (SLU and SL) valves to control the automatic transaxle lock-up condition.

      ON/OFF

      Start/Stop

      Can be used to check the operation of the solenoid (SLU and SL) valves.


        [Vehicle Condition]

      • Throttle valve opening angle: Less than 20%

      • Vehicle speed: 60 km/h (37 mph) or more in 6th gear

      Powertrain > Transmission > Active Test
      Tester Display
      Activate the Lock Up Solenoid

      Tech Tips

      This Active Test can be performed when the vehicle speed is 60 km/h (37 mph) or more.

    8. Lightly depress the accelerator pedal and check that the engine speed does not change abruptly.

      B007WM8E10

      Tech Tips


      • When changing the accelerator pedal opening angle while driving, if the engine speed does not change, lock-up is on.

      • Slowly release, but not fully, the accelerator pedal in order to decelerate. (Fully releasing the pedal will close the throttle valve and lock-up may be turned off.)

PROCEDURE


  1. CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P27567F)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    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.

      Result
      Result Proceed to
      Only DTC P27567F is output A
      DTC P27567F and other DTCs are output B

      Tech Tips


      • If any DTCs other than P27567F are output, perform troubleshooting for those DTCs first.

      • If a solenoid valve is stuck ON or OFF, DTCs for several solenoid valves including the malfunctioning solenoid valve will be stored.


    B

    GO TO DTC CHART Click here

    A

  2. INSPECT SOLENOID (SLU) VALVE


    1. B007XRMC14
      *1 Solenoid (SLU) Valve

      Remove the solenoid (SLU) valve.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 20°C (68°F) 5.0 to 5.6 Ω

    3. Connect a positive (+) lead with a 21 W bulb from the battery to terminal 1 and a negative (-) lead to terminal 2 of the solenoid valve connector. Check that the valve moves and makes an operating sound.

      OK
      Valve moves and makes an operating sound.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SOLENOID (SLU) VALVE Click here

    OK

  3. INSPECT TRANSMISSION VALVE BODY ASSEMBLY


    1. Inspect the transmission valve body assembly.

      Click here

      OK
      There is no foreign matter on each valve and they operate smoothly.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE TRANSMISSION VALVE BODY ASSEMBLY Click here

    OK

  4. INSPECT TORQUE CONVERTER ASSEMBLY


    1. Inspect the torque converter assembly.

      Click here

      OK
      The torque converter assembly is normal.
      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE AUTOMATIC TRANSAXLE ASSEMBLY Click here

    NG

    REPLACE TORQUE CONVERTER ASSEMBLY Click here