Inspection Procedure

1. Clear DTCs (See DTC CHECK / CLEAR ).
2. Check for DTCs B2271, B2272 and B2274.

   Result 

   RESULT REFERENCE
   
   

   Result	Proceed to
   No DTC is output	A
   Any of DTCs is output	B

B: GO TO SMART ACCESS SYSTEM WITH PUSH-BUTTON START  (See DIAGNOSTIC TROUBLE CODE CHART )

A: Go to next step 

1. Disconnect the front power seat switch LH (position control ECU) connectors.
2. Measure the voltage according to the value(s) in the table below

   Standard Voltage 

   STANDARD VOLTAGE
   
   

   Tester Connection	Condition	Specified Condition
   U6-5 (+B) - Body ground	Always	11 to 14 V
   U7-4 (IG) - Body ground	Engine switch on (IG)	11 to 14 V
   U7-8 (SYSB) - Body ground	Always	11 to 14 V

Fig 1: Identifying Front Power Seat Switch LH (Position Control ECU) Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below

   Standard Resistance 

   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   U6-1 (GND) - Body ground	Always	Below 1 Ω

Fig 2: Identifying Front Power Seat Switch LH (Position Control ECU) Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE  (See PROBLEM SYMPTOMS TABLE  )