Inspection Procedure

HINT:

Performing the ACTIVE TEST using the hand-held tester allows the relay, VSV, actuator and so on to operate without parts removal. Performing the ACTIVE TEST as the first step of troubleshooting is one method to shorten labor time.

It is possible to display the DATA LIST during the ACTIVE TEST.

1. Warm up the engine.
2. Turn the ignition switch off.
3. Connect the hand-held tester together with the CAN VIM (controller area network vehicle interface module) to the DLC3.
4. Turn the ignition switch to the ON position.
5. Turn on the tester.
6. Select the item "DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / SHIFT".
7. According to the display on the tester, perform the "ACTIVE TEST".

HINT:

While driving, the shift position can be forcibly changed with the hand-held 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  ).

Fig 1: Diagnostic Item Chart

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

• This test can be conducted when the vehicle speed is 50 km/h (31 mph) or less.
• The 4th to 5th up-shiftings must be performed with the accelerator pedal released.
• The 5th to 4th down-shiftings must be performed with the accelerator pedal released.
• Do not operate the accelerator pedal for at least 2 seconds after shifting and do not shift successively.
• The shift position commanded by the ECM is shown in the DATA LIST (SHIFT) display on the handheld tester.
• The shift solenoid valve S1 is turned on/off normally when the shift lever is in the D position:

1. CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0751) 
   1. Connect the OBD II scan tool or the hand-held tester to the DLC3.
   2. Turn the ignition switch to the ON position and push the OBD II scan tool or the hand-held tester main switch ON.
   3. When you use hand-held tester:

      Select the item "DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES".

   4. Read the DTCs using the OBD II scan tool or the hand-held tester.

      Result: 

      Fig 2: DTC Chart

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   DTC OUTPUT CHART
   
   

   Display (DTC output)	Proceed to
   Only "P0751" is output	A
   "P0751" and other DTCs	B

   HINT:

   If any other codes besides "P0751" are output, perform troubleshooting for those DTCs first.

   1. B: GO TO  DIAGNOSTIC TROUBLE CODE CHART  
   2. A: GO TO NEXT STEP 
2. INSPECT SHIFT SOLENOID VALVE (S1) 
   1. Remove the shift solenoid valve S1.
   2. Measure the resistance according to the value(s) in the table below.

      Standard: 

      STANDARD CHART
      
      

      Tester Connection	Specified Condition 20°C (68°F)
      Solenoid Connector (S1) - Solenoid Body (S1)	11 to 15 Ω

   3. Connect the positive (+) lead to the terminal of the solenoid connector, and the negative (-) lead to the solenoid body.

   OK: 

   The solenoid makes an operating sound. 

   1. NG: REPLACE SHIFT SOLENOID VALVE (S1) (SEE  TRANSMISSION VALVE BODY ASSY (A750E/A750F)  ) 
   2. OK: GO TO NEXT STEP. 
3. INSPECT  TRANSMISSION VALVE BODY ASSY (A750E/A750F) 

   OK: 

   There are no foreign objects on each valve. 

   1. NG: REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSY 
   2. OK: GO TO NEXT STEP. 

   REPAIR OR REPLACE  AUTOMATIC TRANSMISSION ASSY (A750E (2UZ-FE))  or  AUTOMATIC TRANSMISSION ASSY (A750F (2UZ-EF))