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Home >> Toyota >> 2014 >> Highlander XLE, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 40 (Automatic Transmission (U760E) - Diagnostic Codes) >> Automatic Transaxle System >> DTC P0796: Pressure Control Solenoid "C" Performance (Shift Solenoid Valve SL3) [12/2013 - 11/2015] >> Procedure

DTC P0796: Pressure Control Solenoid "C" Performance (Shift Solenoid Valve SL3) [12/2013 - 11/2015]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0796) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

      Powertrain > Engine > Trouble Codes 

    5. Read the DTCs using the Techstream.

      Result

      Result Proceed to
      Only DTC P0796 is output A
      P0796 and other DTCs are output B

      HINT: 

      If a solenoid is stuck off, DTCs for several solenoids including the malfunctioning solenoid will be detected.

    Result:  1

    See step  3

    Result:  2

    See step  2

  2. PERFORM ACTIVE TEST USING TECHSTREAM 
    NOTE:

    This test should always be performed with at least 2 people.

    1. Warm up the engine.
    2. Turn the ignition switch off.
    3. Connect the Techstream to the DLC3.
    4. Turn the ignition switch to ON.
    5. Turn the Techstream on.
    6. Enter the following menus: Powertrain / Engine and ECT / Active Test.
    7. According to the display on the Techstream, perform the Active Test.

      HINT: 

      Comparing the gear commanded by the Active Test with the actual gear enables confirmation of the problem.

      Refer to FAIL-SAFE CHART [12/2013 - ]

      Powertrain > Engine > Active Test 

      Tester Display Measurement Item Control Range Diagnostic Note
      Control the Shift Position Operates the shift solenoid valves to allow gears to selected manually.
      • Press "→" button: Upshift occurs
      • Press "←" button: Downshift occurs
      Can be used to check the operation of the shift solenoid valves.
      Upshifts and downshifts should be performed consecutively. A 10-second interval is required between gear changes.
      Do not downshift at high speeds.
      Doing so will damage the automatic transaxle.
      [Vehicle Condition]
      50 km/h (30 mph) or less

      Powertrain > Engine > Active Test 

      Tester Display
      Control the Shift Position
      NOTE:
      • This test can be conducted when the vehicle is stopped.
      • When shifting gears using the Active Test function, do not operate the accelerator pedal for 2 seconds before and after shifting gears.

      HINT: 

      The gear commanded by the ECM is shown in the Data List / Shift Status display on the Techstream.

    8. Check the vehicle speed and the gear when the engine speed is 1000 rpm.

      HINT: 

      Because the torque converter clutch has not engaged, it may be difficult to obtain the speeds specified in 4th, 5th, and 6th gear, however a difference of speed should still be evident following each gear change.

      Standard

      1st 2nd 3rd 4th 5th 6th
      8 to 12 km/h (5 to 7.5 mph) 15 to 19 km/h (9.3 to 11.8 mph) 21 to 25 km/h (13.0 to 15.5 mph) 31 to 35 km/h (19.3 to 21.7 mph) 44 to 48 km/h (27.3 to 29.8 mph) 52 to 56 km/h (32.3 to 34.8 mph)
    9. Compare the ECM commanded gear and the actual gear.

      Result

      Actual Gear during Malfunction ECM Commanded Gear Proceed to
      1st 2nd 3rd 4th 5th 6th
      Shift solenoid SL1 Stuck ON 1st 2nd 3rd 4th 4th 4th A
      Stuck OFF N*1 N*1 N*1 N*1 5th 6th
      Shift solenoid SL2 Stuck ON 4th 4th 4th 4th 5th 6th B
      Stuck OFF 1st 2nd 3rd 1st N*1 N*1
      Shift solenoid SL3 Stuck ON 2nd 2nd 3rd 4th 5th 6th C
      Stuck OFF 1st 1st 3rd 4th 5th N*1
      Shift solenoid SL4 Stuck ON*3 3rd 3rd 3rd 4th 5th 5th D
      Stuck OFF 1st 2nd 1st 4th N*1 6th
      Shift solenoid SLT Stuck ON N*2 N*2 N*2 N*2 N*2 N*2 E
      Stuck OFF*3 1st 2nd 3rd 4th 5th 6th

      HINT: 

      • *1: Neutral
      • *2: If shift solenoid SLT is stuck on, the line pressure will be low. Therefore, the amount of torque that can be transmitted by each gear is lower than the normal limit. When the engine power exceeds this lowered limit, the engine speed will increase freely.
      • *3: When shift solenoid SLT is stuck off, gear shifting is normal.

    Result:  1

    GO TO DTC CHART (RELATED SHIFT SOLENOID VALVE (SL1) PERFORMANCE DTC P0746). Refer to  DTC P0746: Pressure Control Solenoid "A" Performance (Shift Solenoid Valve SL1) [12/2013 - 11/2015]  

    Result:  2

    GO TO DTC CHART (RELATED SHIFT SOLENOID VALVE (SL2) PERFORMANCE DTC P0776). Refer to  DTC P0776: Pressure Control Solenoid "B" Performance (Shift Solenoid Valve SL2) [12/2013 - 11/2015]  

    Result:  4

    GO TO DTC CHART (RELATED SHIFT SOLENOID VALVE (SL4) PERFORMANCE DTC P2808). Refer to  DTC P2808: Pressure Control Solenoid "G" Performance (Shift Solenoid Valve SL4) [12/2013 - 11/2015]  

    Result:  5

    GO TO DTC CHART (RELATED SHIFT SOLENOID VALVE (SLT) PERFORMANCE DTC P2714). Refer to  DTC P2714: Pressure Control Solenoid "D" Performance (Shift Solenoid Valve SLT) [12/2013 - 11/2015]  

    Result:  3

    See step  3

  3. INSPECT SHIFT SOLENOID VALVE SL3 
    1. Remove shift solenoid valve SL3.
      GTY423887Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Shift Solenoid Valve SL3
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      1 - 2 20°C (68°F) 5.0 to 5.6 Ω
    3. Connect a battery positive (+) lead with a 21 W bulb to terminal 2 and a negative (-) 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

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPLACE SHIFT SOLENOID VALVE SL3. Refer to  COMPONENTS [12/2013 - 08/2014]  Refer to  COMPONENTS [08/2014 - 11/2016] 

    Result:  1

    OK 

    See step  4

  4. INSPECT TRANSMISSION VALVE BODY ASSEMBLY 
    1. Check the transmission valve body assembly.

      Refer to REMOVAL [12/2013 - 08/2014] Refer to REMOVAL [08/2014 - 11/2016]

      OK

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

      Result

      Proceed to
      OK
      NG

    Result:  1

    OK 

    REPAIR OR REPLACE AUTOMATIC TRANSAXLE ASSEMBLY. Refer to  COMPONENTS [12/2013 - 11/2016] 

    Result:  2

    NG 

    REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY. Refer to  COMPONENTS [12/2013 - 08/2014]  Refer to  COMPONENTS [08/2014 - 11/2016]