RM3660EC _58 Vehicle Interior _080733 HEATING / AIR CONDITIONING _0591215 AIR CONDITIONING SYSTEM(for Gasoline Model (NR Series) with Manual Air Conditioning System for Electrical Control Type) U

HEATING / AIR CONDITIONING  AIR CONDITIONING SYSTEM(for Gasoline Model (NR Series) with Manual Air Conditioning System for Electrical Control Type)  TERMINALS OF ECU  


CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY


E417909
2.844,0.448 3.208,0.677 0.365,0.229 3.854,0.448 4.219,0.677 0.365,0.229 4.792,0.448 5.156,0.677 0.365,0.229 4.792,0.094 5.156,0.323 0.365,0.229 2.938,0.469 3.396,0.667 0.458,0.198 10 false l48 3.948,0.49 4.406,0.688 0.458,0.198 10 false l49 4.906,0.49 5.365,0.688 0.458,0.198 10 false z1 4.896,0.125 5.354,0.323 0.458,0.198 10 false m3 5.208,0.125 5.667,0.323 0.458,0.198 10 false *A 5.219,0.49 5.677,0.688 0.458,0.198 10 false *B
*A w/o Rear Air Duct *B w/ Rear Air Duct


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
I48-1 (TAM) - I48-14 (SG-2) R - BR Thermistor assembly signal
·

Ignition switch ON

·

Ambient temperature: 25°C (77°F)


1.05 to 1.45 V
·

Ignition switch ON

·

Ambient temperature: 40°C (104°F)


0.64 to 0.87 V
I48-6 (PRE) - I48-15 (SG-4) L - G Air conditioner pressure sensor signal
·

Ignition switch ON

·

Air conditioning system operating

·

Refrigerant pressure: Abnormal pressure (more than 3.025 MPaG (30.8 kgf/cm2, 439 psi)


4.73 V or higher
·

Ignition switch ON

·

Air conditioning system operating

·

Refrigerant pressure: Abnormal pressure (less than 0.176 MPaG (1.8 kgf/cm2, 26 psi))


Below 0.62 V
·

Ignition switch ON

·

Air conditioning system operating

·

Refrigerant pressure: Normal pressure (less than 3.025 MPaG (30.8 kgf/cm2, 439 psi) and more than 0.176 MPaG (1.8 kgf/cm2, 26 psi))


0.62 to 4.73 V*3
I48-11 (S5-3) - I48-15 (SG-4) B - G Power supply for air conditioner pressure sensor Ignition switch ON 4.75 to 5.25 V
Ignition switch off Below 1 V
I48-14 (SG-2) - Body ground BR - Body ground Ground for thermistor assembly Always Below 1 V
I48-15 (SG-4) - Body ground G - Body ground Ground for air conditioner pressure sensor Always Below 1 V
I49-1 (CANL) - I49-2 (CANH) W - G CAN communication system CAN communication is performed Pulse generation
I49-5 (B) - I49-17 (GND) LG - W-B Power source (Back-up) Always 11 to 14 V
I49-6 (IG+) - I49-17 (GND) SB - W-B Power source (IG) Ignition switch ON 11 to 14 V
Ignition switch off Below 1 V
I49-7 (LIN1) - I49-17 (GND) V - W-B LIN communication signal Ignition switch ON Pulse generation
(See waveform 2)
I49-17 (GND) - Body ground W-B - Body ground Ground for main power supply Always Below 1 V
I49-18 (SOL+) - I49-17 (GND) B - W-B Compressor solenoid operation signal
·

Engine running

·

Blower switch: LO

·

A/C switch: On


Pulse generation
(See waveform 4)
I49-21 (BLW) - I49-17 (GND) W - W-B Blower motor speed control signal
·

Ignition switch ON

·

Blower switch: LO


Pulse generation
(See waveform 1)
m3-2 (BUSG) - Body ground*1 B - Ground for BUS IC Always Below 1 V
m3-3 (BUS) - m3-2 (BUSG)*1 L - B BUS IC control signal Ignition switch ON Pulse generation
(See waveform 3)
m3-4 (BUSB) - m3-2 (BUSG)*1 R - B Power supply for BUS IC Always 11 to 14 V
m3-5 (SG-3) - Body ground*1 GR - Body ground Ground for No. 1 cooler thermistor Always Below 1 V
m3-6 (TE) - m3-5 (SG-3)*1 GR - GR No. 1 cooler thermistor signal
·

Ignition switch ON

·

Evaporator temperature: 0°C (32°F)


1.7 to 2.1 V
·

Ignition switch ON

·

Evaporator temperature: 15°C (59°F)


0.9 to 1.3 V
z1-2 (BUSG) - Body ground*2 - Ground for BUS IC Always Below 1 V
z1-3 (BUS) - z1-2 (BUSG)*2 - BUS IC control signal Ignition switch ON Pulse generation
(See waveform 3)
z1-4 (BUSB) - z1-2 (BUSG)*2 - Power supply for BUS IC Always 11 to 14 V
z1-5 (SG-3) - Body ground*2 - Ground for No. 1 cooler thermistor Always Below 1 V
z1-6 (TE) - z1-5 (SG-3)*2 - No. 1 cooler thermistor signal
·

Ignition switch ON.

·

Evaporator temperature: 0°C (32°F)


1.7 to 2.1 V
·

Ignition switch ON

·

Evaporator temperature: 15°C (59°F)


0.9 to 1.3 V

*1: w/o Rear Air Duct

*2: w/ Rear Air Duct

*3: While sensor voltage is 5 V.


a.
E338778N01
2.823,1.24 3.281,1.438 0.458,0.198 10 false GND

Waveform 1:

Item Content
Terminal No. I49-21 (BLW) - I49-17 (GND)
Tool Setting 2 V/DIV., 1 ms./DIV.
Condition
·

Ignition switch ON

·

Blower switch: LO




b.
E334619N02
0.313,1.563 0.771,1.76 0.458,0.198 10 false GND

Waveform 2:

Item Content
Terminal No. I49-7 (LIN1) - I49-17 (GND)
Tool Setting 2 V/DIV., 20 ms./DIV.
Condition Ignition switch ON


c.
E202803N05
0.333,1.469 0.75,1.646 0.417,0.177 10 GND

Waveform 3:

Item Content
Terminal No. m3-3 (BUS) - m3-2 (BUSG)*1
z1-3 (BUS) - z1-2 (BUSG)*2
Tool Setting 2 V/DIV., 2 ms./DIV.
Condition Ignition switch ON

*1: w/o Rear Air Duct

*2: w/ Rear Air Duct



d.
E145424
2.979,1.271 3.354,1.438 0.375,0.167 10 false GND

Waveform 4:

Item Content
Terminal No. I49-18 (SOL+) - I49-17 (GND)
Tool Setting 5 V/DIV., 500 μs./DIV.
Condition
·

Engine running

·

Blower switch: LO

·

A/C switch: On





CHECK AIR CONDITIONING CONTROL ASSEMBLY


E389743N01
3.375,0.125 3.813,0.385 0.438,0.26 3.521,0.188 3.979,0.385 0.458,0.198 10 false I37

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
I37-7 (LIN1) - Body ground V - Body ground LIN communication signal Ignition switch ON Pulse generation
(See waveform)
I37-8 (ILL+) - Body ground P - Body ground Illumination signal Taillight off Below 1 V
Taillight on 11 to 14 V
I37-9 (IG+) - I37-13 (GND) G - W-B Power source (IG) Ignition switch off Below 1 V
Ignition switch ON 11 to 14 V
I37-13 (GND) - Body ground W-B - Body ground Ground for air conditioning control assembly Always Below 1 V
I37-14 (ILL-) - Body ground W - Body ground Illumination signal Always Below 1 V

a.
E202803N05
0.333,1.469 0.75,1.646 0.417,0.177 10 GND

Waveform:

Item Content
Terminal No. I37-7 (LIN1) - Body ground
Tool Setting 2 V/DIV., 20 ms./DIV.
Condition Ignition switch ON