Power Seat Power Easy Access System Function does not Operate (To 8/2009): Procedure

1. Use the Techstream to check if the CAN communication system is functioning normally. Refer to HOW TO PROCEED WITH TROUBLESHOOTING .

   OK

   CAN communication DTC is not output.

NG → See step   8 

OK: Go to next step 

1. Check that each function of the power seat operates normally by using the front power seat switch LH. Refer to OPERATION CHECK .

   Result

   Result	Proceed to
   Power seat function normally	A
   All power seat functions do not operate	B (Front Power Seat does not Operate with Front Power Seat Switch)
   one or more power seat motors do not operate	C (One or more Power Seat Motors do not Operate)

C → See step   10 

B → See step   9 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Driver Seat / Data List.
5. Read the Data List according to the display on the Techstream.
   DRIVER SEAT
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Driver Seat Buckle SW	Status of the driver seatbelt / ON or OFF	ON: Tongue plate is engaged OFF: Tongue plate is not engaged	-

NG → See step   6 

OK: Go to next step 

1. Replace the front power seat switch LH. Refer to REMOVAL .

NEXT: Go to next step 

1. Check that the power seat easy access system operates normally when engaging and disengaging the tongue plate of the seatbelt with the shift lever in P. Refer to OPERATION CHECK .

   OK

   Power seat power easy access system is normal.

NG → See step   11 

OK → END (FRONT POWER SEAT SWITCH LH WAS DEFECTIVE) 

1. Remove the front seat inner belt assembly LH. Refer to REMOVAL .
   Fig 1: Identifying a5 Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   a5-4 (E) - a5-5 (RDC)	Tongue plate is engaged	Below 1 Ω
   a5-4 (E) - a5-5 (RDC)	Tongue plate is not engaged	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected (Front Seat Inner Belt Assembly LH)

NG → See step   12 

OK: Go to next step 

1. Disconnect the a8 connector from the front power seat switch LH.
   Fig 2: Identifying a8 Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   a8-4 (DBCL) - a5-5 (RDC)	Always	Below 1 Ω
   a5-4 (E) - Body ground	Always	Below 1 Ω
   a8-4 (DBCL) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Front Power Seat Switch LH)
   *2	Front view of wire harness connector (to Front Seat Inner Belt Assembly LH)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   13