DTC P0776: Pressure Control Solenoid "B" Performance (Shift Solenoid Valve SL2): Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / ECT / Trouble Codes.
5. Read the DTCs using the Techstream.

   Result

   Display (DTC Output)	Proceed to
   Only "P0776" is output	A
   "P0776" and other DTCs are output	B

   HINT: 

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

A → See step   3 

B: Go to next step 

1. Warm up the engine.
2. Turn the engine switch off.
3. Connect the Techstream to the DLC3.
4. Turn the engine switch on (IG).
5. Turn the Techstream on.
6. Enter the following menus: Powertrain / 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 .

   Tester Display	Test Details	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

   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 TCM 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 TCM commanded gear and the actual gear.

   Result

   Actual Gear during Malfunction		TCM 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.

A → See step   8 

C → See step   9 

D → See step   10 

E → See step   11 

B: Go to next step 

1. Remove shift solenoid valve SL2.
   Fig 1: Inspecting Shift Solenoid Valve SL1

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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

   TEXT IN ILLUSTRATION
   
   

   *1	Shift Solenoid Valve SL2

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.

NG → See step   6 

OK: Go to next step 

1. Check the transmission valve body assembly. Refer to REMOVAL .

   OK

   There are no foreign objects on each valve and they operate smoothly.

NG → See step   7 

OK → See step   5