Power Seat Power Easy Access System Function does not Operate [08/2015 - ]: Procedure

1. Check that each function of the power seat operates normally by using the front power seat switch (Refer to OPERATION CHECK [08/2015 - ] ).

   OK

   Each function of power seat operates normally by using seat switches.

   RESULT
   
   

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

Result: 

B 

GO TO PROBLEM SYMPTOMS TABLE (Front Power Seat does not Operate with Front Power Seat Switch) 

(Refer to PROBLEM SYMPTOMS TABLE [08/2015 - ] )

Result: 

C 

GO TO PROBLEM SYMPTOMS TABLE (One or more Power Seat Motors do not Operate) 

(Refer to PROBLEM SYMPTOMS TABLE [08/2015 - ] )

Result: 

A 

See step  2

1. Using the Techstream, read the Data List (Refer to DATA LIST / ACTIVE TEST [08/2015 - ] ).
   DRIVER SEAT
   
   

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

   OK

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

Result: 

NG 

See step  5

Result: 

OK 

See step  3

1. Temporarily replace the front power seat switch LH with a new or normally functioning one (Refer to DISASSEMBLY [08/2015 - 08/2021] , or refer to DISASSEMBLY [08/2021 - ] ).

Result: 

NEXT 

See step  4

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 [08/2015 - ] ).

   OK

   Power seat power easy access system is normal.

Result: 

OK 

REPLACE FRONT POWER SEAT SWITCH LH 

(Refer to DISASSEMBLY [08/2015 - 08/2021] , or refer to DISASSEMBLY [08/2021 - ] )

Result: 

NG 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

(Refer to REMOVAL [08/2015 - 08/2019] , or refer to REMOVAL [08/2019 - ] )

1. Remove the front seat inner belt assembly LH (Refer to REMOVAL [08/2015 - ] ).

   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 (RDC) - 2 (E)	Tongue plate engaged	Below 1 Ω
   1 (RDC) - 2 (E)	Tongue plate not engaged	10 kΩ or higher

Result: 

NG 

REPLACE FRONT SEAT INNER BELT ASSEMBLY LH 

(Refer to REMOVAL [08/2015 - ] )

Result: 

OK 

See step  6

1. Disconnect the b5 switch connector.
2. Disconnect the b10 inner belt connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   b5-10 (DBCL) - b10-1 (RDC)	Always	Below 1 Ω
   b10-2 (E) - Body ground	Always	Below 1 Ω
   b5-10 (DBCL) - Body ground	Always	10 kΩ or higher

Result: 

OK 

REPLACE FRONT POWER SEAT SWITCH LH 

(Refer to DISASSEMBLY [08/2015 - 08/2021] , or refer to DISASSEMBLY [08/2021 - ] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR