Inspection Procedure

1. Disconnect the T28 translate ECU connector.
   Fig 1: Identifying T28 Translate ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance of the wire harness side connector.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   T28-40 (GND) - Body ground	Always	Below 1 Ω

3. Measure the voltage of the wire harness side connector.

   Standard voltage 

   VOLTAGE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   T28-1 (IGI) - Body ground	Ignition switch ON	10 to 14 V

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: REPLACE TRANSLATE ECU