Power Seat Power Easy Access System Function does not Operate [10/2015 - ]: Procedure

1. Check that each function of the power seat operates normally by using the front power seat switch (driver seat).

   Refer to OPERATION CHECK [10/2015 - ]

   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 

GO TO OTHER DIAGNOSTIC 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 [10/2015 - ]  

Result: 

C 

GO TO OTHER DIAGNOSTIC PROCEDURE (One or more Power Seat Motors do not Operate). Refer to  One or more Power Seat Motors do not Operate [10/2015 - ]  

Result: 

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.

   Body Electrical > Driver Seat > Data List 

   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	-

   Body Electrical > Driver Seat > Data List 

   Tester Display
   Driver Seat Buckle SW

   OK

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

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  8

Result: 

OK 

See step  3

1. Disconnect the front seat outer belt assembly LH connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Front Seat Outer Belt Assembly LH)

2. Measure the voltage according to the value (s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   U4-1 (IG) - Body ground	Engine switch on (IG)	11 to 14 V
   U4-1 (IG) - Body ground	Engine switch off	Below 1 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS AND CONNECTOR 

Result: 

OK 

See step  4

1. Disconnect the g5 position control ECU and switch assembly LH connector.
2. Measure the resistance according to the value (s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   U4-2 (L) - g5-9 (RDC)	Always	Below 1 Ω
   U4-2 (L) - Body ground	Always	10 kΩ or higher
   g5-9 (RDC) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS AND CONNECTOR 

Result: 

OK 

See step  5

1. Check the seat belt tension reducer system.

   Refer to SYSTEM DESCRIPTION [10/2015 - ]

   OK

   Seat belt tension reducer system is normal.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE FRONT SEAT OUTER BELT ASSEMBLY LH. Refer to  REMOVAL [10/2015 - 09/2017]  , or refer to  REMOVAL [09/2017 - ] 

Result: 

OK 

See step  6

1. Temporarily replace the position control ECU and switch assembly LH with a new or known good one.

   Refer to REMOVAL [10/2015 - 09/2017] , or refer to REMOVAL [09/2017 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  7

1. Check the power seat easy access system.

   Refer to OPERATION CHECK [10/2015 - ]

   OK

   Power seat power easy access system is normal.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (POSITION CONTROL ECU AND SWITCH ASSEMBLY LH WAS DEFECTIVE) 

Result: 

NG 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [10/2015 - 09/2017]  , or refer to  REMOVAL [09/2017 - ] 

1. Remove the front seat inner belt assembly LH.

   Refer to REMOVAL [10/2015 - 09/2017] , or refer to REMOVAL [09/2017 - ]

2. Inspect the front seat inner belt assembly LH.

   Refer to INSPECTION [10/2015 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE FRONT SEAT INNER BELT ASSEMBLY LH. Refer to  REMOVAL [10/2015 - 09/2017]  , or refer to  REMOVAL [09/2017 - ] 

Result: 

OK 

See step  9

1. Disconnect the g5 position control ECU and switch assembly LH connector.
2. Measure the resistance according to the value (s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   g5-10 (DBCL) - g8-1 (RDC)	Always	Below 1 Ω
   g5-10 (DBCL) - Body ground	Always	10 kΩ or higher
   g8-1 (RDC) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY LH. Refer to  REMOVAL [10/2015 - 09/2017]  , or refer to  REMOVAL [09/2017 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS AND CONNECTOR