AUTOMATIC TRANSMISSION SYSTEM, 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 of the shift solenoid valves, valve body and automatic transmission (clutch, brake, gear, etc.).

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Memory

P0761

Shift Solenoid "C" Performance (Shift Solenoid Valve S3)

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*3, 1-trip detection logic*4):

(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 closed

  • Shift solenoid valve SLT remains closed

  • Valve body is blocked

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

Comes on (w/ OBD)

- (w/o OBD)

DTC stored

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Memory

P0761

Shift Solenoid "C" Performance (Shift Solenoid Valve S3)

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*3, 1-trip detection logic*4):

(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 open

  • Valve body is blocked

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

Comes on (w/ OBD)

- (w/o OBD)

DTC stored
Tip:

  • 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 enters fail-safe mode and performs gear shifts 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 during S3 stuck ON malfunction

    1st

    2nd

    3rd

    3rd

    3rd

    3rd

    *2: Actual gear position under fail-safe mode during S3 stuck OFF malfunction

    3rd

    4th

    4th

    4th

    5th

    6th

  • *3: w/ OBD

  • *4: w/o OBD

MONITOR DESCRIPTION

This DTC indicates a "stuck ON malfunction" or "stuck OFF malfunction" of 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 the same, the ECM illuminates the MIL and stores the DTC.

CAUTION / NOTICE / HINT

  1. ACTIVE TEST

    Tip:

    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 engine switch off.

    3. Connect the intelligent tester to the DLC3.

    4. Turn the engine switch on (IG).

    5. Turn the intelligent tester on.

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

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

      Tip:

      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).

      Powertrain > Engine and ECT > Active Test

      Tester Display

      Measurement Item

      Control Range

      Diagnostic Note

      Control the Shift Position

      Operate shift solenoid valves and set each shift position

      • Press "→" button: Shift up

      • Press "←" button: Shift down

      Possible to check operation of the shift solenoid valves.

      [Vehicle Condition]

      50 km/h (30 mph) or less
      Tip:

      • This test can be conducted when the vehicle speed is 50 km/h (30 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.

      • Shift solenoid valve S3 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 engine switch on (IG).

    3. Turn the intelligent tester on.

    4. Enter the following menus: Powertrain / Engine and ECT / DTC.

    5. Read the DTCs using the tester.

      Powertrain > Engine and ECT > Trouble Codes

      Result

      Result

      Proceed to

      Only P0761 is output

      A

      P0761 and other DTCs are output

      B
      Tip:

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

    B

    GO TO DTC CHART

    Click here

    A

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

    Note:

    • Perform the test while the ATF temperature is between 50 and 80°C (122 and 176°F).

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

    • Perform the test with the A/C off.

    Tip:

    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. C218462E02

      Remove the test plug from the transmission case and connect SST.

    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 / Engine and ECT / Active Test.

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

    8. Measure the line pressure.

      Powertrain > Engine and ECT > Active Test

      Tester Display

      Measurement Item

      Control Range

      Diagnostic Note

      Activate the Solenoid (SLT)

      Operate shift solenoid valve SLT and raise line pressure

      ON or OFF

      • HINT:

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

      • ON: No action (normal operation)

      • [Vehicle Condition]

      • Vehicle stopped

      • Engine idling
      Tip:

      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.

      Result

      Result

      OK

      NG

    09992-00095

    09992-00231

    09992-00271

    NG

    REPLACE SHIFT SOLENOID VALVE SLT

    Click here

    OK

  3. INSPECT SHIFT SOLENOID VALVE S3

    1. C209925C02

      *a

      Component without harness connected

      (Shift Solenoid Valve S3)

      Remove 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

      Result

      Result

      OK

      NG
    NG

    REPLACE SHIFT SOLENOID VALVE S3

    Click here

    OK

  4. INSPECT TRANSMISSION VALVE BODY ASSEMBLY

    1. Check the transmission valve body assembly.

      OK

      There are no foreign objects on each valve.

      Result

      Result

      OK

      NG
    OK

    REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY

    Click here

    NG

    REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY

    Click here