Power Seat Power Easy Access System Function does not Operate (07/2015 -): Procedure

1. Check that each function of the power seat operates normally by using the front power seat switch LH (Refer to OPERATION CHECK (07/2015 -) ).

   Result

   Result	Proceed to
   Power seat functions operate normally	A
   All power seat functions do not operate	B
   One or more power seat motors do not operate	C

Result:  B

B 

GO TO OTHER DIAGNOSIS PROCEDURE (Front Power Seat does not Operate with Front Power Seat Switch) 

(Refer to Front Power Seat does not Operate with Front Power Seat Switch (07/2015 -) )

Result:  C

C 

GO TO OTHER DIAGNOSIS PROCEDURE (One or more Power Seat Motors do not Operate) 

(Refer to One or more Power Seat Motors do not Operate (07/2015 - 08/2016) Refer to One or more Power Seat Motors do not Operate [08/2016 - ] )

Result:  A

A 

See step  2

1. Connect the Techstream to the DLC3.
2. Turn the engine 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	Driver seat belt buckle switch / ON or OFF	ON: Driver seat belt fastened OFF: Driver seat belt unfastened	-

   OK

   On the Techstream screen, the item changes between ON and OFF according to the above.

Result:  NG

NG 

See step  8

Result:  OK

OK 

See step  3

1. Disconnect the P24 front seat outer belt assembly LH connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   P24-1 (IG) - Body ground	Engine switch on (IG)	11 to 14 V

Result:  NG

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  OK

OK 

See step  4

1. Disconnect the X10 front power seat switch LH connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   P24-2 (L) - X10-9 (DRDC)	Always	Below 1 Ω
   P24-2 (L) - Body ground	Always	10 kΩ or higher

Result:  NG

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  OK

OK 

See step  5

1. Check that the seat belt tension reducer system (Refer to SYSTEM DESCRIPTION (07/2015 -) ).

   OK

   Seat belt tension reducer system is normal.

Result:  NG

NG 

REPLACE FRONT SEAT OUTER BELT ASSEMBLY LH 

(Refer to REMOVAL (07/2015 -) )

Result:  OK

OK 

See step  6

1. Replace the front power seat switch LH (Refer to REMOVAL (07/2015 -) ).

Result:  NEXT

NEXT 

See step  7

1. Check that the power seat power easy access system operates normally when engaging and disengaging the tongue plate of the seat belt with the shift lever in P (Refer to OPERATION CHECK (07/2015 -) ).

   OK

   Power seat power easy access system is normal.

Result:  OK

OK 

END (FRONT POWER SEAT SWITCH LH WAS DEFECTIVE) 

Result:  NG

NG 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

(Refer to REMOVAL (07/2015 -) )

1. Remove the front seat inner belt assembly LH (Refer to REMOVAL (07/2015 -) ).

   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
   1 - 2	Driver seat belt unfastened	10 kΩ or higher
   1 - 2	Driver seat belt fastened	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

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

Result:  NG

NG 

REPLACE FRONT SEAT INNER BELT ASSEMBLY LH 

(Refer to REMOVAL (07/2015 -) )

Result:  OK

OK 

See step  9

1. Disconnect the X10 front power seat switch LH connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   X10-10 (DBCL) - X16-1	Always	Below 1 Ω
   X16-2 - Body ground	Always	Below 1 Ω
   X10-10 (DBCL) - Body ground	Always	10 kΩ or higher

Result:  OK

OK 

REPLACE FRONT POWER SEAT SWITCH LH 

(Refer to REMOVAL (07/2015 -) )

Result:  NG

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR