Terminals Of Ecu

A/C AMPLIFIER ASSEMBLY

Fig 1: Identifying A/C Amplifier Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Voltage

VOLTAGE REFERENCE CHART

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
SW-5 (J59-2) - Body ground	LG - Body ground	Input climate control signal (Driver side)	Always	10 to 14 V
SW-4 (J59-3) - Body ground	R - Body ground	Input climate control signal (Passenger side)	Always	10 to 14 V
S5-4 (J59-7) - Body ground	BR - Body ground	GND	Engine switch on (IG)	4 to 6 V
SG-4 (J59-10) - Body ground	GR - Body ground	Power supply	Always	10 to 14 V

Standard

STANDARD

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
ROUT (J59-8) - Body ground	W - Body ground	Output climate control signal (Front RH side)	Engine switch on (IG)	Pulse generation
LOUT (J59-16) - Body ground	Y - Body ground	Output climate control signal (Front LH side)	Engine switch on (IG)	Pulse generation

Waveform (Reference): Using an oscilloscope:

WAVEFORM REFERENCE CHART

Item	Condition
Tool setting	2 V/DIV., 500 μsec/DIV.,
Vehicle condition	Turn the engine switch on (IG)