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

Voltage

A/C AMPLIFIER ASSEMBLY VOLTAGE

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

A/C AMPLIFIER ASSEMBLY 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

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

Fig 2: Identifying Waveform