Terminals Of Ecu

HINT: 

Inspect the connector from the back side while the connector is connected.

1. 4WD CONTROL ECU: 
   Fig 1: Identifying 4WD Control ECU Terminals (A32)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
   CANH (A32-14) - CANL (A32-16)	B - V	CAN communication line	Engine switch off	54 to 67 Ω
   IG1 (A32-11) - GND (A32-23)	B-W - W-B	Power source voltage	Engine switch on (IG)	10 to 14 V
   SLC+ (A32-13) - SLC- (A32-32)	P-L - G-R	Transfer control solenoid signal	Engine switch on (IG)	Pulse generation See waveform 1
   FREE (A32-2) - GND (A32-23)	G - W-B	Sets the center differential free	Engine switch on (IG), open and short terminals OPA and CG of the DLC3.	10 to 14 V → 0 to 1.5 V
   GND (A32-23) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

   1. Waveform 1 (Reference):
      Fig 2: Identifying Waveform 1

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Item	Contents
      Tool setting	5 V/DIV, 2 ms./DIV
      Vehicle condition	Engine stop, Engine switch on (IG)