AUTOMATIC TRANSMISSION SYSTEM (for 1VD-FTV), Diagnostic DTC:P0761

DTC Code DTC Name
P0761 Shift Solenoid "C" Performance (Shift Solenoid Valve S3)

DESCRIPTION

The ECM uses signals from the output shaft speed sensor and input speed sensor to detect the actual gear position (1st, 2nd, 3rd, 4th, 5th or 6th gear).

Then the ECM compares the actual gear with the shift schedule in the ECM memory to detect mechanical problems with the shift solenoid valves, valve body or automatic transmission (clutch, brake or gear, etc.).

DTC Code DTC Detection Condition Trouble Area
P0761

A shift solenoid valve S3 stuck ON malfunction*1:

When the ECM directs the transmission to switch to 5th or 6th gear, the engine overruns (clutch slips).

The ECM determines there is a malfunction when either of the following conditions is met (2 trip detection logic).

(a) When the ECM directs the transmission to switch to 4th gear, the actual gear is shifted to 3rd.

(b) When the ECM directs the transmission to switch to 5th gear, the engine overruns (clutch slips).


  • Shift solenoid valve S3 remains open

  • Shift solenoid valve SLT remains open or closed

  • Valve body is blocked

  • Automatic transmission (clutch, brake or gear, etc.)

P0761

A shift solenoid valve S3 stuck OFF malfunction*2:

Shifting to 1st, 2nd, and 3rd gears is impossible.

The ECM determines there is a malfunction when the following conditions are both met (2 trip detection logic).

(a) When the ECM directs the transmission to switch to 2nd gear, the actual gear is shifted to 4th.

(b) When the ECM directs the transmission to switch to 6th gear, the actual gear is shifted to 6th.


  • Shift solenoid valve S3 remains closed

  • Valve body is blocked

  • Automatic transmission (clutch, brake or gear, etc.)

Tech Tips


  • Gear positions in the event of a solenoid valve mechanical problem:

    ECM gear shift command 1st 2nd 3rd 4th 5th 6th
    *1: Actual gear position under S3 stuck ON malfunction 1st 2nd 3rd 3rd N* N*
    *2: Actual gear position under S3 stuck OFF malfunction 3rd 4th 4th 4th 5th 6th

    N*: Neutral

  • Gear position during fail-safe operation:

    If any malfunction is detected, the ECM changes into the fail-safe mode to shift into the gear positions as shown in the table below.

    Gear position under normal conditions 1st 2nd 3rd 4th 5th 6th
    *1: Actual gear position under fail-safe mode when S3 stuck ON malfunction 1st 2nd 3rd 3rd 3rd 3rd
    *2: Actual gear position under fail-safe mode when S3 stuck OFF malfunction 3rd 4th 4th 4th 5th 6th

MONITOR DESCRIPTION

This DTC indicates "stuck ON malfunction" or "stuck OFF malfunction" of the shift solenoid valve S3.

The ECM commands gear shifts by turning the shift solenoid valves "ON/OFF". When the gear position commanded by the ECM and the actual gear position are not same, the ECM illuminates the MIL and stores the DTC.

INSPECTION PROCEDURE


  1. ACTIVE TEST

    Tech Tips

    Using the intelligent tester 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 ignition switch off.

    3. Connect the intelligent tester to the DLC3.

    4. Turn the ignition switch to ON.

    5. Turn the intelligent tester on.

    6. Enter the following menus: Powertrain / ECT / Active Test.

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

      Tech Tips

      While driving, the shift position can be forcibly changed with the intelligent tester.

      Comparing the shift position commanded by the Active Test with the actual shift position enables you to confirm the problem Click here.

      ECT
      Tester Display Test Part Control Range Diagnostic Note
      Control the Shift Position Operate shift solenoid valve and set each shift position
      • Press "→" button: Shift up

      • Press "←" button: Shift down

      It is possible to check the operation of the shift solenoid valves.

      [Vehicle Condition]

      The vehicle speed is 50 km/h (31 mph) or less.

      Tech Tips


      • This test can be conducted when the vehicle speed is 50 km/h (31 mph) or less.

      • The 4th to 5th and 5th to 6th up-shifts must be performed with the accelerator pedal released.

      • The 6th to 5th and 5th to 4th down-shifts must be performed with the accelerator pedal released.

      • Do not operate the accelerator pedal for at least 2 seconds after shifting and do not shift successively.

      • The shift position commanded by the ECM is shown in the Data List display on the tester.

      • The shift solenoid valve SL2 turns ON/OFF normally when the shift lever is in D.

        ECM gear shift command 1st 2nd 3rd 4th 5th 6th
        Shift solenoid valve S3 ON ON ON OFF OFF OFF

PROCEDURE


  1. CHECK DTC OUTPUT (IN ADDITION TO DTC P0761)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on.

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

    5. Read the DTCs using the tester.

      Result
      Result Proceed to
      Only P0761 is output A
      P0761 and other DTCs are output B

      Tech Tips

      If any other codes besides P0761 are output, perform troubleshooting for those DTCs first.


    B
    A
  2. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (SHIFT SOLENOID VALVE SLT)

    Note


    • Perform the test at the normal operating ATF temperature: 50 to 80°C (122 to 176°F).

    • Be careful to prevent SST hose from interfering with the exhaust pipe.

    • Perform the test with the A/C turned off.

    Tech Tips

    Using the intelligent tester 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. A0157IWE01

      Remove the test plug on the transmission case center right side and connect SST.

      SST
      09992-00095   ( 09992-00231, 09992-00271 )
    2. Connect the intelligent tester to the DLC3.

    3. Start the engine and warm it up.

    4. Measure the line pressure with SST.

    5. Turn the intelligent tester on.

    6. Enter the following menus: Powertrain / ECT / Active Test.

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

    8. Measure the line pressure.

      ECT
      Tester Display Test Part Control Range Diagnostic Note
      Activate the Solenoid (SLT)* Operate shift solenoid valve SLT and raise line pressure

      ON or OFF

      Tech Tips


      • OFF: Line pressure up (when Active Test "Activate the Solenoid (SLT)" is performed, ECM commands shift solenoid valve SLT to turn OFF)

      • ON: No action (normal operation)

      [Vehicle Condition]


      • The vehicle is stopped.

      • The engine is idling.

      Tech Tips

      *: Activate the Solenoid (SLT) in the Active Test is performed to check the line pressure changes by connecting SST to the automatic transmission, which is used in the Hydraulic Test Click here as well. Note that the pressure values in the Active Test and hydraulic test are different.

      OK
      The line pressure changes as specified when performing the Active Test.

    NG
    OK
  3. INSPECT SHIFT SOLENOID VALVE S3


    1. A015BYZE02

      Remove the shift solenoid valve S3.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Shift solenoid valve S3 connector terminal - Shift solenoid valve S3 body 20°C (68°F) 11 to 15 Ω
    3. Apply 12 V battery voltage to the shift solenoid valve and check that the valve moves and makes an operating noise.

      OK
      Measurement Condition Specified Condition

      • Battery positive (+) → Shift solenoid valve S3 connector

      • Battery negative (-) → Shift solenoid valve S3 body

      Valve moves and makes an operating noise

    NG
    OK
  4. INSPECT TRANSMISSION VALVE BODY ASSEMBLY


    1. Check the transmission valve body assembly Click here.

      OK
      There are no foreign objects on any valve.

    NG
    OK