СИСТЕМА АВТОМАТИЧЕСКОЙ ТРАНСМИССИИ, Diagnostic DTC:P0771

DTC Code DTC Name
P0771 Shift Solenoid "E" Performance (Shift Solenoid Valve SR)

DESCRIPTION

The TCM detects the actual gear based on signals from the transmission revolution sensors (SP2, NC3 and NT).

Based on the detected gear and oil pressure switch output, the TCM detects related mechanical problems in the shift solenoid valves, valve body and automatic transmission.

Tech Tips

Actual gear shift position when a problem occurs in shift solenoid valve SR:

TCM commanded gear 1st 2nd 3rd 4th 5th 6th 7th 8th
Actual gear during SR stuck OFF malfunction 1 7th 7th 7th 7th 7th 7th 7th 7th
Actual gear during SR stuck OFF malfunction 2 3rd 3rd 3rd 3rd 7th 7th 7th 7th
DTC No.

DTC Detection Condition


  1. Diagnosis Condition

  2. Malfunction Status

  3. Malfunction Time

  4. Other

 Trouble Area
P0771

  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. When gear shifts to 5th to 8th 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 SL2

  • Shift solenoid valve SR

  • Valve body assembly

  • Torque converter assembly

  • Automatic transmission assembly
P0771

  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, actual gear changes to 3rd gear

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

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

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

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

    6. When gear shifts to 8th are requested by the TCM, 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 SR

  • Valve body assembly

  • Torque converter assembly

  • Automatic transmission assembly

MONITOR DESCRIPTION

This DTC indicates a stuck ON malfunction or stuck OFF malfunction of the shift solenoid valve SR.

The TCM commands gear shifts by turning the shift solenoid valves ON/OFF. When the gear commanded by the TCM and the actual gear are not the same, the TCM illuminates the MIL and stores the 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, P0776, P0796 AND P2714)


    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, P0776 and P2714 are output A
      Only DTCs P0771, P0796 and P2714 are output B
      P0771, P0796, P2714 and other DTCs are output C

      Tech Tips

      If any DTCs other than P0771, P0776, P0796 and P2714 are output, perform troubleshooting for those DTCs first.


    B

    GO TO DTC P0796 FLOWCHART Click here

    C

    GO TO DTC CHART Click here

    A

    GO TO DTC P0776 FLOWCHART Click here