Inspection Procedure

HINT:

Using the Techstream to perform Active Test allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Test early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Test.

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) position.
5. Turn the Techstream on.
6. Select the item "Powertrain / Engine and ECT / Active Test".
7. According to the display on tester, perform the "Active Test".
   DIAGNOSTIC NOTE
   
   

   Item	Test Details	Diagnostic Note
   Activate the Lock Up	[Test Details] Control the shift solenoid SLU to set the automatic transmission to the lock-up condition. [Vehicle Condition] Throttle valve opening angle: Less than 35% Vehicle Speed: 60 km/h (37 mph) or more	Possible to check the SLU operation.

   HINT:

   • This test can be conducted when the vehicle speed is 58 km/h (36 mph) or more.
   • This test can be conducted with the 5th or 6th gear.
8. Lightly depress the accelerator pedal and check that the engine speed does not change abruptly.
   Fig 1: Accelerator Pedal Opening Angle Graph

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   • When changing the accelerator pedal opening angle while driving, if the engine speed does not change, lock-up is on.
   • Slowly release, but not fully, the accelerator pedal in order to decelerate. (Fully releasing the pedal will close the throttle valve and lock-up may be turned off automatically.)

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG) position and push the Techstream main switch ON.
3. When you use Techstream:

   Select the item "Powertrain / Engine and ECT / Trouble Codes".

4. Read the DTCs using the Techstream.

   Result 

   RESULT CHART
   
   

   Display (DTC output)	Proceed to
   Only "P2757" is output	A
   "P2757" and other DTCs	B

   HINT:

   If any other codes besides "P2757" are output, perform troubleshooting for those DTCs first.

B: GO TO DTC CHART 

A: Go to next step 

1. Remove the shift solenoid valve SLU.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition 20°C (68°F)
   1 - 2	5.0 to 5.6 Ω

3. Connect the positive (+) lead with a 21 W bulb to terminal 2 and the negative (-) lead to terminal 1 of the solenoid valve connector, then check the movement of the valve.

   OK: 

   The solenoid makes an operating sound. 

   Fig 2: Inspecting Shift Solenoid Valve SLU

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE SHIFT SOLENOID VALVE SLU 

OK: Go to next step 

OK: 

There are no foreign objects on each valve. 

NG: REPLACE TRANSMISSION VALVE BODY ASSEMBLY 

OK: Go to next step 

1. Check the torque converter clutch assembly (See INSPECTION  ).

   OK: 

   The torque converter clutch operates normally. 

NG: REPLACE TORQUE CONVERTER CLUTCH ASSEMBLY 

OK: REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY