Power Seat Power Easy Access System Function does not Operate [10/2018 - 07/2022]: Procedure

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

   Refer to OPERATION CHECK [10/2018 - 07/2022]

   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 FLOW CHART (FRONT POWER SEAT DOES NOT OPERATE WITH FRONT POWER SEAT SWITCH). Refer to  Front Power Seat does not Operate with Front Power Seat Switch [10/2018 - ]  

Result: 

C 

GO TO OTHER FLOW CHART (ONE OR MORE POWER SEAT MOTORS DO NOT OPERATE). Refer to  One or more Power Seat Motors do not Operate [10/2018 - 07/2022]  

Result: 

A 

See step  2

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
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, ON or OFF is displayed accordingly.

   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 (Driver Seat))

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

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   N94-1 (IG) - Body ground	Ignition Switch ON	11 to 14 V
   N94-1 (IG) - Body ground	Ignition Switch off	Below 1 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Disconnect the f15 position control ECU assembly LH connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   N94-2 (L) - f15-28 (DRDC)	Always	Below 1 Ω
   N94-2 (L) or f15-28 (DRDC) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

1. Check the seat belt tension reducer system.

   Refer to SYSTEM DESCRIPTION [10/2018 - ]

   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 [10/2018 - 07/2022] 

Result: 

OK 

See step  6

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

   Refer to REMOVAL [10/2018 - 07/2022]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  7

1. Check the power seat power easy access system.

   Refer to OPERATION CHECK [10/2018 - 07/2022]

   OK

   Power seat power easy access system is normal.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (POSITION CONTROL ECU ASSEMBLY LH WAS DEFECTIVE) 

Result: 

NG 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [10/2018 - 07/2022] 

1. Remove the front seat inner belt assembly LH.

   Refer to REMOVAL [10/2018 - 07/2022]

2. Inspect the front seat inner belt assembly LH.

   Refer to INSPECTION [10/2018 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE FRONT SEAT INNER BELT ASSEMBLY LH. Refer to  REMOVAL [10/2018 - 07/2022] 

Result: 

OK 

See step  9

1. Disconnect the f15 position control ECU assembly LH connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   f15-27 (DBCL) - f7-1	Always	Below 1 Ω
   f15-27 (DBCL) or f7-1 - Body ground	Always	10 kΩ or higher
   f7-2 - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE POSITION CONTROL ECU ASSEMBLY LH. Refer to  REMOVAL [10/2018 - 07/2022] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR