Toyota Corolla Cross: Pressure Control Solenoid "A" Actuator Stuck Off (P07457F)

DESCRIPTION

Using the current from the TCM, the shift solenoid valve SL1 controls the C1 clutch pressure in accordance with the requested shift mode.

When the TCM requests the shift mode to be changed to gear mode, the C1 clutch is engaged and the input torque is transmitted to the 1st gear via the forward clutch drum.

MONITOR DESCRIPTION

When the TCM requests the shift mode to be changed to gear mode, the shift solenoid valve SL1 is turned ON and the C1 clutch is engaged. As a result, the transmission revolution sensor (NT) signal becomes equal to the transmission revolution sensor (NC1) signal.

By comparing the signals indicating the input shaft revolution (speed) and intermediate shaft (C1 clutch) revolution (speed), the TCM judges if the shift mode is gear mode or not.

When the TCM requests the shift mode to be changed to gear mode, if the difference between the transmission revolution sensor (NT) and (NC1) signals is more than 200 rpm, it determines that the shift solenoid valve SL1 is malfunctioning, illuminates the MIL and stores this DTC.

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

• All of the following conditions are met: OFF malfunction (A), (B) and (C) OFF malfunction (A)

  TCM indicate gear mode clutch	Engagement
  l Turbine Speed - Gear Mode Clutch speed l	More than 200 rpm

  OFF malfunction (B) (after OFF malfunction (A) is met)

  Target clamping pressure	1.4 MPa (14.3 kgf/cm2, 203 psi) or more
  l Actual clamping pressure - Target clamping pressure l	Less than 0.5 MPa (5.1 kgf/cm2, 73 psi)

  OFF malfunction (C) (after OFF malfunction (A) and (B) are met)

  TCM indicate belt mode clutch	Engagement
  l Secondary Sheave speed - Output speed l	Less than 25 rpm

• Both of the following conditions are met: ON malfunction (A) and (B)

  ON malfunction (A)

  • Both of the following conditions are met: Condition (1) and (2) Condition (1)

    Duration time after following condition is met:	Less than 0.076 sec. (When maximum turbine speed after shifting from ("P" or "N") to ("D" or "B") is 800 rpm and transmission fluid temperature is 80°C (176°F)) (Conditions vary with maximum turbine speed after shifting from ("P" or "N") to ("D" or "B") and transmission fluid temperature)
    After shifting from ("P" or "N") to ("D" or "B")	-
    Turbine speed - Gear mode clutch speed	100 rpm or more
    Engine speed - Turbine speed	More than 125 rpm
    Maximum turbine speed after shifting from ("P" or "N") to ("D" or "B") - turbine speed	50 rpm or more

    Condition (2)

    Duration time after following condition is met:	Less than 0.2 sec. (When maximum turbine speed after shifting from ("P" or "N") to ("D" or "B") is 800 rpm and transmission fluid temperature is 80°C (176°F)) (Conditions vary with maximum turbine speed after shifting from ("P" or "N") to ("D" or "B") and transmission fluid temperature)
    After shifting from ("P" or "N") to ("D" or "B")	-
    Turbine speed - Gear mode clutch speed	100 rpm or more

  ON malfunction (B) (after ON malfunction (A) is met)

  • TCM indicate gear mode clutch	Engagement
    l Turbine Speed - Gear Mode Clutch speed l	Less than 25 rpm

CONFIRMATION DRIVING PATTERN

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

HINT:

• After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
• When clearing the permanent DTCs, refer to the Clear Permanent DTC procedure.

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1. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
2. Turn the ignition switch off and wait for 2 minutes or more.
3. Turn the ignition switch to ON and turn the GTS on.
4. Start the engine.
5. Perform the D Position Shift Test inspection in Road Test. [*1]

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   HINT:

   [*1]: Normal judgment procedure.

   The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

6. Stop the vehicle.
7. Enter the following menus: Powertrain / Transmission / Utility / All Readiness.
8. Input the DTC: P07457F.
9. Check the DTC judgment result.

   GTS Display	Description
   NORMAL	DTC judgment completed System normal
   ABNORMAL	DTC judgment completed System abnormal
   INCOMPLETE	DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions
   N/A	Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

   HINT:

   • If the judgment result shows NORMAL, the system is normal.
   • If the judgment result shows ABNORMAL, the system has a malfunction.
   • If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.

CAUTION / NOTICE / HINT

NOTICE:

• Perform the universal trip to clear permanent DTCs.

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• Perform registration and/or initialization when parts related to the continuously variable transaxle system are replaced.

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• Check that no DTCs are stored after performing initialization.

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HINT:

If any DTCs other than P07457F are output, perform troubleshooting for those DTCs first.

PROCEDURE

(a) Enter the following menus:

(b) Read the DTCs using the GTS.

HINT:

• If DTC P074512 or P074514 is output, perform troubleshooting for that DTC first.
• If DTCs P074512 and P074514 are not output but DTC P281F00 is output, perform troubleshooting for DTC P281F00 first.
• If DTCs P074512, P074514 and P281F00 are not output but DTC P07757F is output, perform troubleshooting for DTC P07757F first.

B

GO TO DTC CHART (DTC P074512)

C

GO TO DTC CHART (DTC P074514)

D

GO TO DTC CHART (DTC P281F00)

E

GO TO DTC CHART (DTC P07757F)

F

GO TO DTC CHART

A

(a) Disconnect the transmission wire connector from the shift solenoid valve SL1.

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(b) Connect a positive (+) lead from the auxiliary battery with a 21 W bulb to terminal 1 and a negative (-) lead to terminal 2 of the shift solenoid valve SL1 connector. Check that the valve moves and makes an operating sound.

OK:

Valve moves and makes an operating sound.

NG

GO TO STEP 4

OK

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NEXT

PERFORM REGISTRATION AND INITIALIZATION for Registration: Click here for Initialization: Click here

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PERFORM REGISTRATION AND INITIALIZATION for Registration: Click here for Initialization: Click here

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