Inspection Procedure

HINT:

Read freeze frame data using hand-held tester or OBD II scan tool. Because freeze frame records the engine conditions when a malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, etc. at the time of the malfunction.

1. Connect hand-held tester, read value of select stroke sensor. 

   PREPARATION: 

   1. Turn the ignition switch ON.
   2. Connect the hand-held tester to the DLC3.
   3. Shift into N position.
   4. Select TARG SEL STRK on the ACTIVE TEST menu.

   CHECK: 

   Read the select stroke sensor value by using the hand-held tester

   OK: 

   Select stroke sensor value Table.
   
   

   Target Select Stroke (Active Test Display Value)	Select Stroke Sensor Value
   0 mm (0.039 in.)	(a)
   64 mm (2.520 in.)	(b)

   1. The difference between (a) and (b) should be approx. 22.0 mm (0.0866 in.). 
   2. (b) - (a) = approx. 22.0 mm (0.0866 in.) 
   1. OK: Go to step   3 
   2. NG: Go to next step 
2. Check resistance between terminals VCSL and VSLT of transmission control ECU 

   PREPARATION: 

   Disconnect the connector from the transmission control ECU.

   CHECK: 

   Measure the resistance between terminals VCSL and VSLT.

   OK: 

   1. 1-50 kΩ 
   1. OK: Replace transmission control ECU. 
   2. NG: Go to next step 
3. Check for open or short in harness and connector between transmission control ECU and select stroke sensor ( PROCEDURE  ). 
   1. NG: Repair or replace harness and connector. 
   2. OK: Go to next step 
   Fig 1: Measuring resistance between terminal VCSL and VSLT of transmission control ECV

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Inspect select stroke sensor. 

   PREPARATION: 

   Remove the select stroke sensor.

   CHECK: 

   Check the voltage of the select stroke sensor.

   1. Connect 3 dry cell batteries (1.5 V) in series.
   2. Connect the battery positive (+) wire to terminal A and the battery negative (-) wire to terminal C.
   3. Measure the voltage between terminals C and B when moving the link.

   OK: 

   1. Voltage (Power source voltage at 4.5 V): 
   Voltage output Table
   
   

   Sensor Angle (degree)	Terminal (C - B) Output Voltage (V)
   44.8	4.127-4.306
   135.5	0.185-0.364

   HINT:

   Formula when the power source voltage has changed.

   (4 V less than or equal power source, less than or equal 6 V)

   Voltage output Table.
   
   

   Sensor Angle (degree)	Output Voltage (V)
   44.8	Power source x (0.937 +/- 0.02)
   135.5	Power source x (0.061 +/- 0.02)

   1. NG: Replace select stroke sensor. 
   2. OK: Go to next step 
   Fig 2: Measuring voltage between terminals C and B of select stroke sensor.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Replace transmission control ECU. 

   After replacing the transmission control ECU, check that the problem disappears.

   1. NG: Replace select stroke sensor. 
   2. OK: END.