Inspection Procedure

HINT:

Performing the intelligent tester'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 the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
4. Turn the ignition switch ON.
5. Turn the intelligent tester ON.
6. Enter the following menus: DIAGNOSIS / OBD/MOBD / ECT / ACTIVE TEST.
7. Perform the ACTIVE TEST using the intelligent tester.

HINT:

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

ECM 

HINT:

• This test can be conducted when the vehicle speed is 50 km/h (31 mph) or less.
• The 4th to 5th up-shift must be performed with the accelerator pedal released.
• The 5th to 4th down-shift 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 intelligent tester.
• The shift solenoid valve SR and SL1 turns ON/OFF normally when the shift lever is in the D position:

1. CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0746 AND P0771) 
   1. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
   2. Turn the ignition switch ON and push the intelligent tester main switch ON.
   3. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
   4. Read the DTCs using the intelligent tester.

   Result 

   RESULT REFERENCE
   
   

   Display (DTC output)	Proceed to
   Only P0746 and P0771 are output Only P0771 is output	A
   P0746, P0771 and other DTCs are output	B

   HINT:

   If any other codes besides P0746 and P0771 are output, perform troubleshooting for those DTCs first.

   B: GO TO DTC CHART 

   A: GO TO Next Step 

2. PERFORM ACTIVE TEST BY INTELLIGENT TESTER (SHIFT SOLENOID VALVE SLT) 
   NOTE:

   • Perform the test at the normal operating ATF temperature: 50 to 80°C (122 to 176°F).
   • Be careful to prevent SST's hose from interfering with the exhaust pipe.
   • Perform the test with the A/C OFF.

   HINT:

   Performing the intelligent tester'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. Remove the test plug on the transmission case center right side and connect SST.

      SST 09992-00095 (09992-00231, 09992-00271) 

   2. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
   3. Start the engine and warm it up.
   4. Measure the line pressure with SST.
   5. Turn the intelligent tester ON.
   6. Enter the following menus: DIAGNOSIS / OBD/MOBD / ECT/ACTIVE TEST.
   7. Follow the instructions on the tester and perform the ACTIVE TEST .
   8. Measure the line pressure with SST.
   Fig 1: Measuring Line Pressure

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   ECM 

   ACTIVE TEST DETAIL
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   LINE PRESS UP*	Operate the shift solenoid SLT and raise line pressure	ON or OFF HINT: OFF: Line pressure up (when Active Test "LINE PRESS UP" is performed, ECM commands SLT solenoid to turn OFF) ON: No action (normal operation)	[Vehicle Condition] Vehicle stopped Engine: idling
   HINT: *: LINE PRESS UP in the Active Test is performed to check the line pressure changes by connecting SST to the automatic transmission, which is used in the HYDRAULIC TEST  as well. Please note that the pressure values in the Active Test and Hydraulic Test are different.

   Result 

   RESULT REFERENCE
   
   

   Line pressure value	DTC output in previous check	Proceed to
   Changed	P0746 and P0771	A
   Changed	P0771	B
   Not changed	-	C

   B: GO TO step   4

   C: REPLACE SHIFT SOLENOID VALVE SLT 

   A: GO TO Next Step 

3. INSPECT SHIFT SOLENOID VALVE SL1 
   1. Remove the shift solenoid valve SL1.
   2. Measure the resistance of the solenoid value.

      Standard resistance 

      RESISTANCE SPECIFICATION
      
      

      Tester Connection	Condition	Specified Condition
      Terminal 1 of the shift solenoid valve SL1 - terminal 2	20°C (68°F)	5.0 to 5.6 Ω

   3. Connect the battery's positive (+) lead with a 21 W bulb to terminal 2 and the negative (-) lead to terminal 1 of the solenoid valve connector. Then check that the valve moves and makes an operating noise.
   4. Check the operating noise of the solenoid valve.

   OK: Solenoid makes operating noise. 

   NG: REPLACE SHIFT SOLENOID VALVE SL1 

   Fig 2: Measuring Resistance Between Shift Solenoid Valve SL1 Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: GO TO Next Step 

4. INSPECT SHIFT SOLENOID VALVE SR 
   1. Remove the shift solenoid valve SR.
   2. Measure the resistance of the solenoid value.

      Standard resistance 

      RESISTANCE SPECIFICATION
      
      

      Tester Connection	Condition	Specified Condition
      Shift solenoid SR connector - Shift solenoid SR body	20°C (68°F)	11 to 15 Ω

   3. Connect the battery's positive (+) lead to the terminal of the solenoid connector, and the negative (-) lead to the solenoid body.
   4. Check the operating noise of the solenoid valve.

   OK: Solenoid makes operating noise. 

   NG: REPLACE SHIFT SOLENOID VALVE SR 

   Fig 3: Measuring Resistance Between Shift Solenoid Valve SR Terminals And Valve Body

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: GO TO Next Step 

5. 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: REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY