Inspection Procedure

HINT:

Performing Techstream's Active Test allows relay, VSV, actuator and other items to be operated without removing any parts. Performing the Active Test early in troubleshooting is one way to save time.

The Data List can be displayed during the Active Test.

1. Warm up the engine.
2. Turn the ignition switch OFF.
3. Connect Techstream to the DLC3.
4. Turn the ignition switch ON and turn the tester ON.
5. Enter the following menus: Powertrain / Engine and ECT / Active Test.
6. Follow the instructions on the tester and perform the Active Test.

   HINT:

   While driving, the shift position can be forcibly changed with the tester.

   Comparing the shift position commanded by the Active Test with the actual shift position enables you to confirm the problem (See FAIL-SAFE CHART  ).

   ACTIVE TEST
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Control the Shift Position	[Test Details] Operate the shift solenoid valve and set each shift lever position by yourself [Vehicle Condition] IDL: ON 50 km/h (31 mph) or less [Other information] Press "→" button: Shift up Press "←" button: Shift down	1st/2nd/3rd/4th	Possible to check the operation of the shift solenoid valves

   HINT:

   • This test can be conducted when the vehicle speed is 50 km/h (31 mph) or less.
   • The shift position commanded by the ECM is shown in the Data List/Shift Status display on the tester.

1. CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0766) 
   1. Connect Techstream to the DLC3.
   2. Turn the ignition switch ON and turn the tester ON.
   3. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
   4. Read the DTCs using the tester.

      Result 

      RESULT REFERENCE
      
      

      Display (DTC output)	Proceed to
      Only P0766 is output	A
      P0766 and other DTCs are output	B

      HINT:

      If any other codes besides P0766 are output, perform troubleshooting for those DTCs first.

   B: GO TO DTC CHART 

   A: go to next step 

2. INSPECT SHIFT SOLENOID VALVE S4 
   1. Remove the shift solenoid valve S4.
   Fig 1: Identifying Shift Solenoid Valve S4
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Measure the resistance between the solenoid valve terminal and solenoid valve body.

      Standard resistance: 

      11 to 15 Ω at 20°C (68°F) 

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

      OK: 

      Valve moves and makes operating noise. 

   NG: REPLACE SHIFT SOLENOID VALVE S4 

   OK: go to next step 

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

      OK: 

      There are no foreign objects on each valve. 

   NG: REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY 

   OK: go to next step 

4. INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY 
   1. Check the torque converter clutch assembly (see TORQUE CONVERTER AND DRIVE PLATE  ).

      OK: 

      The torque converter clutch operates normally. 

   NG: REPLACE TORQUE CONVERTER CLUTCH ASSEMBLY 

   OK: REPAIR OR REPLACE AUTOMATIC TRANSAXLE ASSEMBLY