Inspection Procedure

1. Disconnect the front power seat switch connectors.
2. Measure the voltage according to the value(s) in CONNECTOR TERMINAL VOLTAGE SPECIFICATION .

   Standard: 

   CONNECTOR TERMINAL VOLTAGE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   P28-4 (IG) - Body ground	Ignition switch ON	10 to 14 V
   P28-8 (SYSB) - Body ground	Always	10 to 14 V
   P27-5 (+B) - Body ground	Always	10 to 14 V

   Fig 1: Disconnecting Front Power Seat Switch Connectors

   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 CONNECTOR TERMINAL RESISTANCE SPECIFICATION .

   Standard: 

   CONNECTOR TERMINAL RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   P27-1 (GND) - Body ground	Always	Below 1 Ω

   Fig 2: Identifying ECU Connector

   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