RM35X0E _58 Vehicle Interior _079316 HEATING / AIR CONDITIONING _0386652 AIR CONDITIONING SYSTEM(for Manual Air Conditioning System) U

HEATING / AIR CONDITIONING  AIR CONDITIONING SYSTEM(for Manual Air Conditioning System)  TERMINALS OF ECU  


AIR CONDITIONING AMPLIFIER ASSEMBLY


E407128N02
2.063,0.333 2.646,0.583 0.583,0.25 3.552,0.333 4.135,0.583 0.583,0.25 4.781,0.333 5.365,0.583 0.583,0.25 2.229,0.365 2.688,0.563 0.458,0.198 10 false N41 3.719,0.375 4.177,0.573 0.458,0.198 10 false N40 4.958,0.375 5.417,0.573 0.458,0.198 10 false N39

a.

Disconnect the N40 air conditioning amplifier assembly connector.


b.

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

Terminal No.
(Symbol) 		Wiring Color Terminal Description Condition Specified Condition
N40-5 (B) - Body ground P - Body ground Power source (Back-up) Always 11 to 14 V
N40-6 (IG+) - Body ground V - Body ground Power source (IG) Ignition switch ON 11 to 14 V
Ignition switch off Below 1 V
N40-17 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω


c.

Reconnect the N40 air conditioning amplifier assembly connector.


d.

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

Terminal No.
(Symbol) 		Wiring Color Terminal Description Condition Specified Condition
N41-2 (S5-1) - Body ground R - Body ground Power source of sensor Ignition switch off → ON Below 1 V → 4.75 to 5.25 V
N41-4 (SG-8) - Body ground*4 B - Body ground Ground for sensor Always Below 1 Ω
N41-6 (PRE) - N41-15 (SG-4) B - GR Air conditioner pressure sensor signal
·

Engine running

·

Air conditioning system operating

·

Refrigerant pressure: Normal pressure (below 3025 kPa [30.8 kgf/cm2, 439 psi] and higher than 176 kPa [1.8 kgf/cm2, 26 psi])


0.74 to 4.61 V
·

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: Abnormal pressure (more than 3025 kPa (30.8 kgf/cm2, 439 psi))


4.61 V or higher
N41-8 (TEC) - N41-4 (SG-8)*4 V - B No. 2 cooler thermistor signal
·

Engine running

·

Evaporator temperature: 0°C (32°F)


1.7 to 2.1 V
·

Engine running

·

Evaporator temperature: 15°C (59°F)


0.9 to 1.3 V
N41-9 (TSD) - N41-2 (S5-1) B - R Solar sensor signal
·

Engine running

Ignition switch ON

·

Solar sensor covered with a cloth


Below 0.8 V
·

Engine running

·

Solar sensor subjected to electric light


0.8 to 4.3 V
N41-11 (S5-3) - Body ground L - Body ground Power source of sensor Ignition switch off → ON Below 1 V → 4.75 to 5.25 V
N41-12 (LOCK) - Body ground B - Body ground A/C lock sensor signal
·

Engine running

·

Blower switch: LO

·

A/C switch: On (magnet clutch on)


Pulse generation
(See waveform 1)
N41-18 (CFN+) - Body ground*7 SB - Body ground CDS FAN relay drive output signal
·

Engine running

·

Ambient temperature: 28°C (82°F) or lower

·

Air conditioning system operating

·

Condenser fan system operating


Below 1 V
N41-14 (SG-5) - Body ground W - Body ground Ground for sensor Always Below 1 Ω
N41-15 (SG-4) - Body ground GR - Body ground Ground for sensor Always Below 1 Ω
N41-16 (PTC2) - Body ground*1 V - Body ground Quick heater assembly operation signal
·

Ignition switch ON

·

A/C switch: On

·

Temperature setting: MAX HOT

·

Ambient temperature: 0°C (32°F) or lower

·

Engine coolant temperature: 62.5°C (144.5°F) or lower

·

Blower switch: Off → LO (after 20 seconds)


11 to 14 V → Below 1 V
N41-17 (PTC3) - Body ground*1 L - Body ground Quick heater assembly operation signal
·

Ignition switch ON

·

A/C switch: On

·

Temperature setting: MAX HOT

·

Ambient temperature: 0°C (32°F) or lower

·

Engine coolant temperature: 62.5°C (144.5°F) or lower

·

Blower switch: Off → LO (after 30 seconds)


11 to 14 V → Below 1 V
N41-19 (MGC) - Body ground G - Body ground Magnet clutch drive output signal
·

Engine running

·

Blower switch: Off

·

A/C switch: Off or on (magnet clutch off)


11 to 14 V
·

Engine running

·

Blower switch: On

·

A/C switch: On (magnet clutch on)


Below 1 V
N41-20 (REC) - Body ground L - Body ground Recirculation/fresh motor signal
·

Ignition switch ON

·

Recirculation/fresh switch: Off → on


Below 1 V → 11 to 14 V
N41-21 (FRS) - Body ground G - Body ground Recirculation/fresh motor signal
·

Ignition switch ON

·

Recirculation/fresh switch: Off → on


11 to 14 V → Below 1 V
N40-1 (CANL) W CAN communication line - -
N40-2 (CANH) V CAN communication line - -
N40-3 (RDAC) - Body ground*2, *4 W - Body ground Rear blower switch signal
·

Ignition switch ON

·

Rear blower switch: LO


11 to 14 V → Below 1 V
N40-4 (SW 1) - Body ground GR - Body ground Blower switch signal
·

Ignition switch ON

·

Blower switch: Off → on


11 to 14 V → Below 1 V
N40-7 (RLIN) - Body ground*3 Y - Body ground LIN communication signal Ignition switch ON Pulse generation
(See waveform 2)
N40-9 (FR) - Body ground LG - Body ground Recirculation/fresh switch signal
·

Ignition switch ON

·

Recirculation/fresh switch: Off → on


Below 1 V → 11 to 14 V
N40-11 (F DEF) - Body ground R - Body ground Mode switch signal
·

Engine running

·

DEF switch: Off → on


Below 1 V → 11 to 14 V
N40-12 (SWVC) - Body ground*5 L - Body ground Idle up switch operation signal
·

Engine running

·

Blower switch: LO

·

A/C switch: On

·

Idle up switch: Off → on


11 to 14 V → Below 1 V
N40-13 (BLWH) - Body ground*3, *4 W - Body ground Blower switch signal
·

Ignition switch ON

·

Blower switch: LO


Pulse generation
(See waveform 3)
N40-22 (RMGV) - Body ground*4 L - Body ground Rear magnet valve signal
·

Ignition switch ON

·

Rear expansion value : Off → on


11 to 14 V → Below 1 V
N40-23 (PTC1) - Body ground*1 W - Body ground Quick heater assembly operation signal
·

Ignition switch ON

·

A/C switch: On

·

Temperature setting: MAX HOT

·

Ambient temperature: 0°C (32°F) or lower

·

Engine coolant temperature: 62.5°C (144.5°F) or lower

·

Blower switch: Off → LO (after 10 seconds)


11 to 14 V → Below 1 V
N40-25 (A/CS) - Body ground Y - Body ground A/C switch signal
·

Ignition switch ON

·

Rear A/C switch: Off → on


Below 1 V → 11 to 14 V
N40-26 (HEAT) - Body ground*6 V - Body ground Max Hot Sensing signal
·

Ignition switch ON

·

No. 3 heater control switch sub-assembly: MAX HOT position → Other than MAX HOT position


10 kΩ or higher → Below 3 Ω
N39-5 (SG-3) - Body ground W - Body ground Ground for sensor Always Below 1 Ω
N39-6 (TE) - N39-5 (SG-3) LG - W 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/ PTC Heater

*2: w/o Integration Control and Panel

*3: w/ Integration Control and Panel

*4: w/ Rear Cooler

*5: w/ Idle Up Switch

*6: w/ Max Hot Sensing

*7: w/ Condenser Blower Motor



e.
E116941
0.177,0.948 0.542,1.146 0.365,0.198 10 false GND

Waveform 1:

Item Content
Terminal No. N41-12 (LOCK) - N41-14 (SG-2)
Tool Setting 200 mV/DIV., 10 ms./DIV.
Vehicle Condition
·

Engine running

·

Blower switch: LO

·

A/C switch: On (magnet clutch on)




f.
E334619
0.292,1.552 0.75,1.75 0.458,0.198 10 false GND

Waveform 2:

Item Content
Terminal No. N40-7 (RLIN) - Body ground*
Tool Setting 2 V/DIV., 20 μs./DIV.
Vehicle Condition Ignition switch ON

*: w/ Integration Control Panel



g.
E349844
2.792,1.656 3.135,1.865 0.344,0.208 10 false GND

Waveform 3:

Item Content
Terminal No. N40-13 (BLWH) - Body ground*
Tool Setting 1 V/DIV., 500 μs/DIV.
Vehicle Condition
·

Ignition switch ON

·

Blower switch: LO



*: w/ Integration Control and Panel, w/ Rear Cooler




INTEGRATION CONTROL AND PANEL ASSEMBLY (w/ Integration Control Panel)


E416671
1.354,0.365 1.854,0.615 0.5,0.25 1.479,0.417 1.938,0.615 0.458,0.198 10 false a11

a.

Disconnect the a11 air conditioning control assembly connector.


b.

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

Terminal No.
(Symbol) 		Wiring Color Terminal Description Condition Specified Condition
a11-5 (E) - Body ground LA - Body ground Ground Always Below 1 Ω
a11-1 (IG) - Body ground LA-GR - Body ground Power source (IG) Ignition switch off Below 1 V
Ignition switch ON 11 to 14 V


c.

Reconnect the a11 air conditioning control assembly connector.


d.

Check for waveform according to the value(s) in the table below.

Terminal No.
(Symbol) 		Wiring Color Terminal Description Condition Specified Condition
a11-2 (RLIN) - Body ground Y - Body ground LIN communication Ignition switch ON Pulse generation
(See waveform 1)


e.
E334619
0.292,1.552 0.75,1.75 0.458,0.198 10 false GND

Waveform 1:

Item Content
Terminal No. a11-2 (RLIN) - Body ground
Tool Setting 2 V/DIV., 20 μs./DIV.
Vehicle Condition Ignition switch ON



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COMBINATION METER ASSEMBLY


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