СИСТЕМА АВТОМАТИЧЕСКОЙ ТРАНСМИССИИ, Diagnostic DTC:P0796

DTC Code DTC Name
P0796 Pressure Control Solenoid "C" Performance (Shift Solenoid Valve SL3)

DESCRIPTION

Based on signals from the transmission revolution sensors (NT, SP2 and NC3), the actual gear is detected.

If the detected gear is different than the commanded gear, the TCM detects related mechanical problems in the shift solenoid valves, valve body and automatic transmission.

Tech Tips

Actual gear when a problem occurs in shift solenoid valve SL3:

TCM commanded gear 1st 2nd 3rd 4th 5th 6th 7th 8th
Actual gear during SL3 stuck ON malfunction 3rd 3rd 3rd 3rd 7th 7th 7th 7th
Actual gear during SL3 stuck OFF malfunction 1st 2nd N (1st)* 4th 5th 6th N* 8th

*: Neutral

DTC No.

DTC Detection Condition


  1. Diagnosis Condition

  2. Malfunction Status

  3. Malfunction Time

  4. Other

 Trouble Area
P0796

  1. ECT is 40°C (104°F) or higher, ATF temperature is -10°C (14°F) or higher, and the vehicle is driven with the shift lever in D (no malfunctions are detected in shift solenoid valve SL1, 2, 3, 4 and 5, SR, transmission revolution sensors (NT, NC3, SP2), engine coolant temperature sensor, oil temperature sensor, knock control sensor, electronic throttle, or CAN2)

  2. One of following occurs:


    1. When gear shifts to 1st are requested by the TCM, the actual gear changes to 3rd gear

    2. When gear shifts to 2nd are requested by the TCM, the actual gear changes to 3rd gear

    3. When gear shifts to 4th are requested by the TCM, the actual gear changes to 3rd gear

    4. When gear shifts to 5th are requested by the TCM, the actual gear changes to 7th gear

    5. When gear shifts to 6th are requested by the TCM, the actual gear changes to 7th gear

    6. When gear shifts to 8th are requested by the TCM, the actual gear changes to 7th gear

  3. Malfunction status occurs 2 times per trip

  4. 2 trip detection logic

  • Shift solenoid valve SL3

  • Shift solenoid valve SL4

  • Shift solenoid valve SR

  • Shift solenoid valve SLT

  • Valve body assembly

  • Torque converter assembly

  • Automatic transmission assembly
P0796

  1. ECT is 40°C (104°F) or higher, ATF temperature is -10°C (14°F) or higher, and the vehicle is driven with shift lever in D (no malfunctions are detected in shift solenoid valve SL1, 2, 3, 4 and 5, SR, transmission revolution sensors (NT, NC3, SP2), engine coolant temperature sensor, oil temperature sensor, knock control sensor, electronic throttle, or CAN2)

  2. When gear shifts to 3rd or 7th are requested by the TCM, the engine speed overruns (neutral status)

  3. Malfunction status continues for 0.5 sec. or more (1 trip)

  4. 2 trip detection logic

  • Shift solenoid valve SL3

  • Shift solenoid valve SLT

  • Valve body assembly

  • Torque converter assembly

  • Automatic transmission assembly

MONITOR DESCRIPTION

The TCM commands gear shifts by turning the shift solenoid valves on and off. According to the input shaft revolution (speed), intermediate (counter) shaft revolution (speed) and output shaft revolution (speed), the TCM detects the actual gear (1st, 2nd, 3rd, 4th, 5th, 6th, 7th or 8th gear position). When the gear commanded by the TCM and the actual gear are not the same, the TCM illuminates the MIL and stores this DTC.

INSPECTION PROCEDURE

Note

Perform registration and/or initialization when parts related to the automatic transmission are replaced Click here.

PROCEDURE


  1. CHECK DTC OUTPUT (IN ADDITION TO DTC P0771, P0796, P2714 AND P2808)


    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 / ECT / Trouble Codes.

    5. Read the DTCs using the GTS.

      Result
      Result Proceed to
      Only DTCs P0771, P0796 and P2714 are output A
      Only DTCs P0796 and P2714 are output B
      Only DTCs P0796, P2714 and P2808 are output C
      P0771, P0796, P2714 and other DTCs are output D

      Tech Tips

      If any DTCs other than P0771, P0776 and P2714 are output, perform troubleshooting for those DTCs first.


    B

    CLEAR DTC AND PERFORM STALL SPEED TEST Click here

    C

    CLEAR DTC AND PERFORM STALL SPEED TEST Click here

    D

    GO TO DTC CHART Click here

    A

  2. CLEAR DTC AND PERFORM STALL SPEED TEST


    1. Clear the DTCs Click here.

      Tech Tips

      Write down the currently output DTCs before clearing them.

    2. Perform the stall speed test Click here.

      Result
      Result Proceed to
      Stall speed test can be performed A
      Stall speed test cannot be performed B

    B

    INSPECT SHIFT SOLENOID VALVE SLT Click here

    A

  3. INSPECT SHIFT SOLENOID VALVE SR


    1. A01FGS8E01
      Text in Illustration
      *1 Shift Solenoid Valve SR

      Remove the shift solenoid valve SR Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Shift solenoid SR connector - Shift solenoid SR body 20°C (68°F) 11 to 15 Ω

    3. Connect a positive (+) battery lead to the terminal of the solenoid valve connector, and a negative (-) battery lead to the solenoid body. Then check that the valve moves and makes an operating sound.

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

    B

    INSPECT SHIFT SOLENOID VALVE SL3 Click here

    A

    REPLACE SHIFT SOLENOID VALVE SR Click here

  4. CLEAR DTC AND PERFORM STALL SPEED TEST


    1. Clear the DTCs Click here.

      Tech Tips

      Write down the currently output DTCs before clearing them.

    2. Perform the stall speed test Click here.

      Result
      Result Proceed to
      Stall speed test can be performed A
      Stall speed test cannot be performed B

    A

    INSPECT SHIFT SOLENOID VALVE SL3 Click here

    B

    INSPECT SHIFT SOLENOID VALVE SLT Click here

  5. CLEAR DTC AND PERFORM STALL SPEED TEST


    1. Clear the DTCs Click here.

      Tech Tips

      Write down the currently output DTCs before clearing them.

    2. Perform the stall speed test Click here.

      Result
      Result Proceed to
      Stall speed test can be performed A
      Stall speed test cannot be performed B

    B

    INSPECT SHIFT SOLENOID VALVE SLT Click here

    A

  6. CLEAR THE DTC AND RUNNING TEST


    1. Clear the DTCs Click here.

      Tech Tips

      Write down the currently output DTCs before clearing them.

    2. Start the engine, drive the vehicle and perform the inspection.

      Result
      Result Proceed to
      Only DTCs P0796, P2714 and P2808 are output A
      Only DTCs P0796 and P2714 are output B

    B

    INSPECT SHIFT SOLENOID VALVE SL3 Click here

    A

  7. INSPECT SHIFT SOLENOID VALVE SL4


    1. A01FI7WE21
      Text in Illustration
      *1 Shift Solenoid Valve SL4

      Remove the shift solenoid valve SL4 Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Terminal 1 of the shift solenoid valve SL4 - Terminal 2 20°C (68°F) 5.0 to 5.6 Ω

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

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

    B

    INSPECT TRANSMISSION VALVE BODY ASSEMBLY Click here

    A

    REPLACE SHIFT SOLENOID VALVE SL4 Click here

  8. INSPECT SHIFT SOLENOID VALVE SLT


    1. A01FI7WE21
      Text in Illustration
      *1 Shift Solenoid Valve SLT

      Remove the shift solenoid valve SLT Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Terminal 1 of the shift solenoid valve SLT - Terminal 2 20°C (68°F) 5.0 to 5.6 Ω

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

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

    B

    INSPECT TRANSMISSION VALVE BODY ASSEMBLY Click here

    A

    REPLACE SHIFT SOLENOID VALVE SLT Click here

  9. INSPECT SHIFT SOLENOID VALVE SL3


    1. A01FI7WE21
      Text in Illustration
      *1 Shift Solenoid Valve SL3

      Remove the shift solenoid valve SL3 Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Terminal 1 of the shift solenoid valve SL3 - Terminal 2 20°C (68°F) 5.0 to 5.6 Ω

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

      OK
      Valve moves and makes an operating sound.

    NG

    REPLACE SHIFT SOLENOID VALVE SL3 Click here

    OK

  10. INSPECT TRANSMISSION VALVE BODY ASSEMBLY


    1. Check the transmission valve body assembly Click here.

      OK
      There is no foreign matter on each valve and they operate smoothly.

    NG

    REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY Click here

    OK

  11. INSPECT TORQUE CONVERTER ASSEMBLY


    1. Check the torque converter assembly Click here.

      OK
      The torque converter operates normally.

    NG

    REPLACE TORQUE CONVERTER ASSEMBLY Click here

    OK

    REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY Click here