Terminals Of Ecu

Fig 1: Identifying Terminals Of ECU

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the C6 meter connector.
2. Measure the voltage and resistance of the wire harness side connector.

   Standard: 

   TERMINAL SPECIFICATION CHART
   
   

   Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
   C6-4 - Body ground	LG - Body ground	IG power supply	Ignition switch OFF -> ON	Below 1 V -> 10 to 14 V
   C6-3 - Body ground	V - Body ground	+B power supply	Always	10 to 14 V
   C6-1 - Body ground	BR - Body ground	Ground	Always	Below 1 Ω
   C6-8 - Body ground	BR - Body ground	Driver side courtesy switch input	Driver side door closed -> open	10 kΩ or higher -> Below 1 Ω
   C6-7 - Body ground	Y - Body ground	Unlock warning switch input	No key in ignition key cylinder -> key inserted	10 kΩ or higher -> Below 1 Ω

If the result is not as specified, there may be a malfunction on the wire harness side.