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. Follow the instructions on the tester and read the ACTIVE TEST.
   ACTIVE TEST DETAIL
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   LOCK UP	Control shift solenoid SLU to set automatic transmission to lock-up condition	ON or OFF	Possible to check shift solenoid valve SLU operation [Vehicle Condition] Throttle valve opening angle: Less than 35% Vehicle speed: 60 km/h (36 mph) or more

   HINT:

   This test can be conducted in the 5th gear.

8. Lightly depress the accelerator pedal and check that the engine speed does not change abruptly.

HINT:

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

Fig 1: Engine Speed Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P2757) 
   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 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 

2. INSPECT SHIFT SOLENOID VALVE SLU 
   1. Remove the shift solenoid valve SLU.
   2. Measure the resistance of the solenoid valve.

      Standard resistance: 5.0 to 5.6 Ω at 20°C (68°F) 

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

   OK: Solenoid makes operating noise. 

   NG: REPLACE SHIFT SOLENOID VALVE SLU 

   Fig 2: Measuring Resistance Between Shift Solenoid Valve SLU Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: GO TO Next Step 

3. INSPECT 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 

   OK: The torque converter clutch operates normally. 

   NG: REPLACE TORQUE CONVERTER CLUTCH ASSEMBLY 

   OK: REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY