Inspection Procedure

1. Disconnect the position control ECU and switch assembly connectors.
2. Measure the voltage according to the value(s) in the table below.

   Voltage 

   POSITION CONTROL ECU AND SWITCH ASSEMBLY (POWER SEAT CONTROL SWITCH AND ECU POWER SOURCE CIRCUIT)
   
   

   Tester Connection	Condition	Specified Condition
   P33-5(+B) - Body ground	Always	10 to 14 V
   P32-4(IG) - Body ground	Ignition switch on	10 to 14 V
   P32-8(SYSB) - Body ground	Always	10 to 14 V

   Fig 1: Inspecting Position Control ECU And Switch Assembly (Power Seat Control Switch And ECU Power Source Circuit)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

OK : GO TO NEXT STEP. 

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

   Resistance 

   POSITION CONTROL ECU AND SWITCH ASSEMBLY (POWER SEAT CONTROL SWITCH AND ECU GROUND CIRCUIT)
   
   

   Tester Connection	Condition	Specified Condition
   P33-1(GND) - Body ground	Always	Below 1 Ω

   Fig 2: Inspecting Position Control ECU And Switch Assembly (Power Seat Control Switch And ECU Ground Circuit)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT) 

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