Terminals Of Ecu

A/C AMPLIFIER ASSEMBLY

Fig 1: Identifying A/C Amplifier Assembly Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the voltage according to the value(s) in the table below

Standard Voltage

STANDARD VOLTAGE

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
J59-2 (SW 5) - Body ground	LG - Body ground	Input climate control signal (Driver side)	Engine switch on (IG)	Below 6 V
J59-3 (SW 4) - Body ground	R - Body ground	Input climate control signal (Passenger side)	Engine switch on (IG)	Below 6 V
J59-7 (S5-4) - Body ground	BR - Body ground	Power supply	Engine switch on (IG)	4 to 6 V
J59-10 (SG-4) - Body ground	GR - Body ground	GND	Always	Below 1 V

Standard

TERMINAL DESCRIPTION CHART

Tester Connection	Wiring Color	Terminal Description	Switch Condition	Specified Condition
J59-8 (ROUT) - Body ground	W - Body ground	Output climate control signal (Front RH side)	Engine switch on (IG)	Pulse generation (See 1waveform 1)
J59-16 (LOUT) - Body ground	Y - Body ground	Output climate control signal (Front LH side)	Engine switch on (IG)	Pulse generation (See 1waveform 1)

Waveform (Reference). Using an oscilloscope.

Waveform 1

WAVEFORM 1 REFERENCE

Terminal No	J59-8 (ROUT) - Body ground J59-16 (LOUT) - Body ground
Tool Setting	2 V/DIV, 500 μsec/DIV
Vehicle Condition	Turn the engine switch on (IG)

Fig 2: Waveform Graph