Power Seat Power Easy Access System Function does not Operate [06/2018 - 08/2021]: Procedure

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

   Refer to OPERATION CHECK [06/2018 - ]

   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 [06/2018 - 08/2021] 

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 [06/2018 - 08/2021]  

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, ON or OFF is displayed accordingly.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  5

Result: 

OK 

See step  3

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

   for TMC Made: Refer to REMOVAL [06/2018 - 08/2021]

   for TMMK Made: Refer to REMOVAL [06/2018 - 08/2021]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  4

1. Check the power seat power easy access system.

   Refer to OPERATION CHECK [06/2018 - ]

   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 [06/2018 - 08/2021] 

1. Remove the front seat inner belt assembly LH.

   Refer to REMOVAL [06/2018 - 08/2021]

2. Inspect the front seat inner belt assembly LH.

   Refer to INSPECTION [06/2018 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE FRONT SEAT INNER BELT ASSEMBLY LH. Refer to  REMOVAL [06/2018 - 08/2021] 

Result: 

OK 

See step  6

1. Disconnect the U48 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
   U48-27 (DBCL) - U42-1	Always	Below 1 Ω
   U48-27 (DBCL) or U42-1 - Body ground	Always	10 kΩ or higher
   U42-2 - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE POSITION CONTROL ECU ASSEMBLY LH 

for TMC Made: Refer to REMOVAL [06/2018 - 08/2021]

for TMMK Made: Refer to REMOVAL [06/2018 - 08/2021]

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR