Toyota Tacoma (2015-2018) Service Manual: Terminals Of Ecu

Toyota Tacoma (2015-2018) Service Manual / Air Conditioning / Air Conditioning System(for Automatic Air Conditioning System) / Terminals Of Ecu

TERMINALS OF ECU

1. AIR CONDITIONING AMPLIFIER ASSEMBLY

HINT:

Check from the rear of the connector while it is connected to the air conditioning amplifier assembly.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
A35-1 (TAM) - A36-28 (SG-8)	W - LG	Ambient temperature sensor signal	Ignition switch ON Ambient temperature: 25°C (77°F)	1.35 to 1.75 V
A35-1 (TAM) - A36-28 (SG-8)	W - LG	Ambient temperature sensor signal	Ignition switch ON Ambient temperature: 40°C (104°F)	0.9 to 1.2 V
A35-2 (PRE) - A36-10 (GND)	V - W-B	Air conditioner pressure sensor signal	Engine running Air conditioning system operating Refrigerant pressure: Abnormal pressure (more than 3025 kPa (30.8 kgf/cm2, 439 psi))	4.71 V or higher
			Engine running Air conditioning system operating Refrigerant pressure: Abnormal pressure (less than 176 kPa (1.8 kgf/cm2, 26 psi))	Below 0.74 V
			Engine running Air conditioning system operating Refrigerant pressure: Normal pressure (less than 3025 kPa (30.8 kgf/cm2, 439 psi) and more than 176 kPa (1.8 kgf/cm2, 26 psi))	0.74 to 4.71 V
A35-3 (TPO) - A35-19 (SG-6)	B - L	Mode damper position sensor signal	Ignition switch ON Mode switch: DEF	4.43 to 4.53 V
A35-3 (TPO) - A35-19 (SG-6)	B - L	Mode damper position sensor signal	Ignition switch ON Mode switch: FACE	0.47 to 0.57 V
A35-4 (TPR) - A35-18 (SG-5)	G - GR	Air mix damper position sensor (for front passenger side) signal	Ignition switch ON Set temperature switch (for front passenger side): MAX HOT	4.45 to 4.55 V
A35-4 (TPR) - A35-18 (SG-5)	G - GR		Ignition switch ON Set temperature switch (for front passenger side): MAX COOL	0.45 to 0.55 V
A35-5 (TPL) - A35-17 (SG-4)	V - R	Air mix damper position sensor (for driver side) signal	Ignition switch ON Set temperature switch (for driver side): MAX HOT	4.45 to 4.55 V
A35-5 (TPL) - A35-17 (SG-4)	V - R	Air mix damper position sensor (for driver side) signal	Ignition switch ON Set temperature switch (for driver side): MAX COOL	0.45 to 0.55 V
A35-6 (TPI) - A35-16 (SG-3)	LG -V	Air inlet damper position sensor signal	Ignition switch ON Recirculation/Fresh switch: Fresh	1.63 to 1.73 V
A35-6 (TPI) - A35-16 (SG-3)	LG -V	Air inlet damper position sensor signal	Ignition switch ON Recirculation/Fresh switch: Recirculation	3.27 to 3.37 V
A35-7 (LOCK) - A36-10 (GND)	G - W-B	A/C lock sensor signal	Engine running Blower switch: LO A/C switch: on	Pulse generation (See waveform 1)
A35-10 (MGC) - A36-10 (GND)	G - W-B	Magnetic clutch operation signal	Engine running Blower switch: LO A/C switch: off	11 to 14 V
A35-10 (MGC) - A36-10 (GND)	G - W-B	Magnetic clutch operation signal	Engine running Blower switch: LO A/C switch: on	Below 1 V
A35-11 (AMDH) - A36-10 (GND)	BE - W-B	Air mix damper servo motor (for driver side) operating signal	Ignition switch ON Set temperature switch (for driver side): MAX COOL to MAX HOT	11 to 14 V (Servo motor operating)
A35-12 (AMDC) - A36-10 (GND)	SB - W-B	Air mix damper servo motor (for driver side) operating signal	Ignition switch ON Set temperature switch (for driver side): MAX HOT to MAX COOL	11 to 14 V (Servo motor operating)
A35-13 (AMPH) - A36-10 (GND)	Y - W-B	Air mix damper servo motor (for front passenger side) operating signal	Ignition switch ON Set temperature switch (for front passenger side): MAX COOL to MAX HOT	11 to 14 V (Servo motor (Servo motor operating)
A35-14 (AMPC) - A36-10 (GND)	W - W-B	Air mix damper servo motor (for front passenger side) operating signal	Ignition switch ON Set temperature switch (for front passenger side): MAX HOT to MAX COOL	11 to 14 V (Servo motor operating)
A35-16 (SG-3) - Body ground	V - Body ground	Ground for air inlet damper position sensor	Always	Below 1 Ω
A35-17 (SG-4) - Body ground	R - Body ground	Ground for air mix damper position sensor (for driver side)	Always	Below 1 Ω
A35-18 (SG-5) - Body ground	GR - Body ground	Ground for air mix damper position sensor (for front passenger side)	Always	Below 1 Ω
A35-19 (SG-6) - Body ground	L - Body ground	Ground for mode damper position sensor	Always	Below 1 Ω
A35-22 (AC1) - A36-10 (GND)	BE - W-B	Compressor operation signal	Ignition switch ON A/C switch: off	11 to 14 V
A35-22 (AC1) - A36-10 (GND)	BE - W-B	Compressor operation signal	Ignition switch ON A/C switch: on	Below 1 V
A35-25 (AIF) - A36-10 (GND)	P - W-B	Air inlet damper servo motor operating signal	Ignition switch ON Recirculation/Fresh switch: Recirculation to Fresh	11 to 14 V (Servo motor operating)
A35-26 (AIR) - A36-10 (GND)	B - W-B	Air inlet damper servo motor operating signal	Ignition switch ON Recirculation/Fresh switch: Fresh to Recirculation	11 to 14 V (Servo motor operating)
A35-27 (AOF) - A36-10 (GND)	LG - W-B	Mode damper servo motor operating signal	Ignition switch ON Mode switch: DEF to FACE	11 to 14 V (Servo motor operating)
A35-28 (AOD) - A36-10 (GND)	R - W-B	Mode damper servo motor operating signal	Ignition switch ON Mode switch: FACE to DEF	11 to 14 V (Servo motor operating)
A35-30 (S5-5) - A36-10 (GND)	G - W-B	Power supply for mode damper position sensor	Ignition switch off	Below 1 V
A35-30 (S5-5) - A36-10 (GND)	G - W-B	Power supply for mode damper position sensor	Ignition switch ON	4.75 to 5.25 V
A36-1 (IG+) - A36-10 (GND)	GR - W-B	Power source (IG)	Ignition switch ON	11 to 14 V
A36-1 (IG+) - A36-10 (GND)	GR - W-B	Power source (IG)	Ignition switch off	Below 1 V
A36-4 (ACT) - A36-10 (GND)	R - W-B	Compressor operation signal	Ignition switch ON A/C switch: off	Below 1 V
A36-4 (ACT) - A36-10 (GND)	R - W-B	Compressor operation signal	Ignition switch ON A/C switch: on	4.75 to 5.25 V
A36-7 (HRLY) - A36-10 (GND)	Y - W-B	HTR relay operation signal	Ignition switch ON Blower switch: off	11 to 14 V
A36-7 (HRLY) - A36-10 (GND)	Y - W-B	HTR relay operation signal	Ignition switch ON Blower switch: LO	Below 1 V
A36-8 (CANH)	L	CAN communication system	-	-
A36-9 (CANL)	W	CAN communication system	-	-
A36-10 (GND) - Body ground	W-B - Body ground	Ground for main power supply	Always	Below 1 Ω
A36-11 (LIN1) - A36-10 (GND)	SB - W-B	LIN communication signal	Ignition switch ON	Pulse generation
A36-12 (S5-1) - A36-10 (GND)	SB - W-B	Power supply for air conditioner pressure sensor	Ignition switch off	Below 1 V
A36-12 (S5-1) - A36-10 (GND)	SB - W-B	Power supply for air conditioner pressure sensor	Ignition switch ON	4.5 to 5.5 V
A36-13 (S5-2) - A36-10 (GND)	Y - W-B	Power supply for air inlet damper position sensor	Ignition switch off	Below 1 V
A36-13 (S5-2) - A36-10 (GND)	Y - W-B	Power supply for air inlet damper position sensor	Ignition switch ON	4.75 to 5.25 V
A36-14 (S5-3) - A36-10 (GND)	Y - W-B	Power supply for air mix damper position sensor (for driver side)	Ignition switch off	Below 1 V
A36-14 (S5-3) - A36-10 (GND)	Y - W-B		Ignition switch ON	4.75 to 5.25 V
A36-15 (TE) - A36-27 (SG-7)	B - GR	Evaporator temperature sensor signal	Ignition switch ON Evaporator temperature: 0°C (32°F)	1.7 to 2.1 V
A36-15 (TE) - A36-27 (SG-7)	B - GR	Evaporator temperature sensor signal	Ignition switch ON Evaporator temperature: 15°C (59°F)	0.9 to 1.3 V
A36-16 (TR) - A36-26 (SG-1)	R - BR	Room temperature sensor signal	Ignition switch ON Cabin temperature: 25°C (77°F)	1.8 to 2.2 V
A36-16 (TR) - A36-26 (SG-1)	R - BR	Room temperature sensor signal	Ignition switch on (IG) Cabin temperature: 40°C (104°F)	1.2 to 1.6 V
A36-17 (B) - A36-10 (GND)	LG - W-B	Power source (Back-up)	Always	11 to 14 V
A36-19 (PTC1) - A36-10 (GND)*1	V - W-B	Quick heater operation signal	Engine running Blower switch off Temperature settings: MAX HOT Engine coolant temperature 65°C or lower Ambient temperature 10°C or lower	11 to 14 V
A36-19 (PTC1) - A36-10 (GND)*1	V - W-B	Quick heater operation signal	Engine running Blower switch on Temperature settings: MAX HOT Engine coolant temperature 65°C or lower Ambient temperature 10°C or lower	Below 1 V
A36-20 (PTC2) - A36-10 (GND)*1	W - W-B	Quick heater operation signal	Engine running Blower switch off Temperature settings: MAX HOT Engine coolant temperature 65°C or lower Ambient temperature 10°C or lower	11 to 14 V
A36-20 (PTC2) - A36-10 (GND)*1	W - W-B	Quick heater operation signal	Engine running Blower switch on Temperature settings: MAX HOT Engine coolant temperature 65°C or lower Ambient temperature 10°C or lower	Below 1 V
A36-21 (PTC3) - A36-10 (GND)*1	P - W-B	Quick heater operation signal	Engine running Blower switch off Temperature settings: MAX HOT Engine coolant temperature 65°C or lower Ambient temperature 10°C or lower	11 to 14 V
A36-21 (PTC3) - A36-10 (GND)*1	P - W-B	Quick heater operation signal	Engine running Blower switch on Temperature settings: MAX HOT Engine coolant temperature 65°C or lower Ambient temperature 10°C or lower	Below 1 V
A36-23 (BLW) - A36-10 (GND)	BE - W-B	Blower motor speed control signal	Ignition switch ON Blower switch: LO	Pulse generation (See waveform 2)
A36-26 (SG-1) - Body ground	BR - Body ground	Ground for room temperature sensor	Always	Below 1 Ω
A36-27 (SG-7) - Body ground	GR - Body ground	Ground for evaporator temperature sensor	Always	Below 1 Ω
A36-28 (SG-8) - Body ground	LG - Body ground	Ground for air conditioner pressure sensor, ambient temperature sensor, A/C lock sensor	Always	Below 1 Ω
A36-29 (S5-4) - A36-10 (GND)	R - W-B	Power supply for air mix damper position sensor (for front passenger side)	Ignition switch off	Below 1 V
A36-29 (S5-4) - A36-10 (GND)	R - W-B		Ignition switch ON	4.75 to 5.25 V

*1: w/ PTC Heater

(a) Waveform 1:

Item	Content
Terminal No.	A35-7 (LOCK) - A36-10 (GND)
Tool Setting	200 mV/DIV., 10 ms./DIV.
Vehicle Condition	Engine running Blower switch: LO A/C switch: on

(b) Waveform 2:

Item	Content
Terminal No.	A36-23 (BLW) - A36-10 (GND)
Tool Setting	1 V/DIV., 500 μs./DIV.
Vehicle Condition	Ignition switch ON Blower switch: LO

2. AIR CONDITIONING CONTROL ASSEMBLY

HINT:

Check from the rear of the connector while it is connected to the air conditioning control assembly.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
A33-8 (IG+) - A33-1 (GND)	LG - W-B	Power source (IG)	Ignition switch off	Below 1 V
A33-8 (IG+) - A33-1 (GND)	LG - W-B	Power source (IG)	Ignition switch ON	11 to 14 V
A33-1 (GND) - Body ground	W-B - Body ground	Ground for air conditioning control assembly	Always	Below 1 Ω
A33-2 (STX) - A33-1 (GND)	SB - W-B	LIN communication signal	Ignition switch ON	Pulse generation

3. ECM (See page Data List / Active Test )

Problem Symptoms Table

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DATA LIST / ACTIVE TEST 1. DATA LIST Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. T ...

Other materials:

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Removal
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