RM35X0E _58 Vehicle Interior _079316 HEATING / AIR CONDITIONING _0386651 AIR CONDITIONING SYSTEM(for Automatic Air Conditioning System) U

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


AIR CONDITIONING AMPLIFIER ASSEMBLY


E414331N03
2.083,0.333 2.667,0.583 0.583,0.25 5.083,0.333 5.667,0.583 0.583,0.25 6.25,0.333 6.833,0.583 0.583,0.25 3.583,0.333 4.167,0.583 0.583,0.25 0.635,0.333 1.219,0.583 0.583,0.25 3.76,0.375 4.219,0.573 0.458,0.198 10 false N43 5.25,0.375 5.708,0.573 0.458,0.198 10 false N42 6.49,0.385 6.948,0.583 0.458,0.198 10 false t2 2.25,0.375 2.708,0.573 0.458,0.198 10 false N44 0.802,0.375 1.26,0.573 0.458,0.198 10 false N79

a.

Disconnect the N42 and N44 air conditioning amplifier assembly connectors.


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
N42-5 (B) - Body ground P - Body ground Power source (Back-up) Always 11 to 14 V
N42-6 (IG+) - Body ground P - Body ground*2
V - Body ground*3 		Power source (IG) Ignition switch ON 11 to 14 V
Ignition switch off Below 1 V
N42-17 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
N44-1 (+B2) - Body ground*1 P - Body ground Power source (Back-up) Always 11 to 14 V
N44-4 (GND2) - Body ground* W-B - Body ground Ground Always Below 1 Ω

*1: w/ Integration Control Panel

*2: for Van

*3: for Wagon



c.

Reconnect the N42 and N44 air conditioning amplifier assembly connectors.


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
N79-8 (TR) - N79-14 (SG-6)*5, *6 P - L Rear room temperature sensor signal
·

Ignition switch ON

·

AUTO switch: On

·

Cabin temperature: 25°C (77°F)


1.05 to 1.45 V
·

Ignition switch ON

·

AUTO switch: On

·

Cabin temperature: 40°C (104°F)


0.64 to 0.87 V
N79-11 (TEC) - N79-15 (SG-8)*5, *6 V - B Rear evaporator temperature sensor signal
·

Ignition switch ON

·

Evaporator temperature: 0°C (32°F)


2.0 to 2.4 V
·

Ignition switch ON

·

Evaporator temperature: 15°C (59°F)


1.4 to 1.8 V
N79-14 (SG-6) - Body ground*5, *6 L - Body ground Ground for sensor Always Below 1 Ω
N79-15 (SG-8) - Body ground*5, *6 B - Body ground Ground for sensor Always Below 1 Ω
N79-16 (RNNO) - Body ground*4 GR - Body ground No. 2 ion generator sub-assembly operation signal
·

Ignition switch ON

·

Blower switch: LO


Below 1 V
·

Ignition switch ON

·

Blower switch: Off


11 to 14 V
N79-18 (RNIN) - Body ground*4 W - Body ground No. 2 ion generator sub-assembly condition signal
·

Ignition switch ON

·

Blower switch: LO

·

"nanoe": On


Below 1 V
·

Ignition switch ON

·

Blower switch: Off

·

"nanoe": Off


4.75 to 5.25 V
N44-2 (RBBU) - N44-3 (RBUG)*5 R - GR Power supply for BUS IC Always 11 to 14 V
N44-3 (RBUG) - Body ground*5 GR - Body ground Ground for BUS IC Always Below 1 Ω
N44-7 (RBUS) - N44-3 (RBUG)*5 B - GR BUS IC control signal Ignition switch ON Pulse generation
(See waveform 3)
N44-10 (BLWH) - Body ground*5, *6 W - Body ground Blower switch signal
·

Ignition switch ON

·

Blower switch: LO


Pulse generation
(See waveform 2)
N44-20 (RLIN) - Body ground*5, *6 G - Body ground LIN communication signal Ignition switch ON Pulse generation
(See waveform 1)
N43-3 (SG-1) - Body ground LG - Body ground Ground for sensor Always Below 1 Ω
N43-5 (TR) - Body ground B - Body ground Room temperature sensor signal
·

Ignition switch ON

·

A/C switch: On

·

Cabin temperature: 25°C (77°F)


1.05 to 1.45 V
·

Ignition switch ON

·

A/C switch: On

·

Cabin temperature: 40°C (104°F)


0.64 to 0.87 V
N43-6 (PRE) - N43-15 (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
N43-11 (S5-3) - Body ground L - Body ground Power source of sensor Ignition switch off → ON Below 1 V → 4.75 to 5.25 V
N43-12 (LOCK) - Body ground B - Body ground Air conditioning lock sensor signal
·

Engine running

·

Blower switch: LO

·

A/C switch: On


Pulse generation
(See waveform 4)
N43-14 (SG-5) - Body ground W - Body ground Ground for sensor Always Below 1 Ω
N43-15 (SG-4) - Body ground GR - Body ground Ground for sensor Always Below 1 Ω
N43-16 (PTC2) - Body ground*1 V - Body ground Quick heater assembly operation signal
·

Ignition switch ON

·

Temperature setting: MAX HOT

·

A/C switch: On

·

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
N43-17 (PTC3) - Body ground*1 L - Body ground Quick heater assembly operation signal
·

Ignition switch ON

·

Temperature setting: MAX HOT

·

A/C switch: On

·

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
N43-19 (MGC) - Body ground G - Body ground Magnetic clutch operation signal
·

Engine running

·

Blower switch: LO

·

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


11 to 14 V
·

Engine running

·

Blower switch: LO

·

A/C switch: On (magnet clutch on)


Below 1 V
N43-21 (MGCA) - Body ground*2 P - Body ground Viscous heater with magnetic clutch assembly operation signal
·

Engine running

·

Blower switch: LO

·

A/C switch: On

·

Heater switch assembly: Off or on (magnet clutch off)


11 to 14 V
·

Engine running

·

Blower switch: LO

·

A/C switch: On

·

Heater switch assembly: On (magnet clutch on)


Below 1 V
N41-18 (CFN+) - Body ground*7 L - 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
N42-1 (CANL) - CAN communication line - -
N42-2 (CANH) - CAN communication line - -
N42-4 (NAIN) - Body ground*4 GR - Body ground No. 1 ion generator sub-assembly condition signal
·

Ignition switch ON

·

Blower switch: LO


Below 1 V
·

Ignition switch ON

·

Blower switch: Off


4.75 to 5.25 V
N42-7 (LIN1) - Body ground V - Body ground LIN communication signal Ignition switch ON Pulse generation
(See waveform 1)
N42-12 (SWVC) - Body ground*2, *3 R - Body ground*2
L - Body ground*3 		Heater switch assembly operation signal*2
Idle up switch operation signal*3
·

Engine running

·

Blower switch: LO

·

A/C switch: On

·

Heater switch assembly: Off → on*2

·

Idle up switch: Off → on*3


11 to 14 V → Below 1 V
N42-21 (BLW) - Body ground Y - Body ground Blower motor speed control signal
·

Ignition switch ON

·

Blower switch: LO


Pulse generation
(See waveform 2)
N42-22 (RMGV) - Body ground*5, *6 L - Body ground Rear magnet valve signal
·

Engine running

·

A/C switch: On

·

A/C switch (for Rear Automatic Air Conditioning): On

·

Blower switch: LO

·

Rear expansion value: Off → on


11 to 14 V → Below 1 V
N42-23 (PTC1) - Body ground*1 W - Body ground Quick heater assembly operation signal
·

Ignition switch ON

·

Temperature setting: MAX HOT

·

A/C switch: On

·

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
N42-24 (NANO) - Body ground*4 G - Body ground No. 1 ion generator sub-assembly operation signal
·

Ignition switch ON

·

Blower switch: LO


Below 1 V
·

Ignition switch ON

·

Blower switch: Off


11 to 14 V
t2-2 (BUSG) - Body ground - Ground for BUS IC Always Below 1 Ω
t2-3 (BUS) - t2-2 (BUSG) - BUS IC control signal Ignition switch ON Pulse generation
(See waveform 3)
t2-4 (BUSB) - t2-2 (BUSG) - Power supply for BUS IC Always 11 to 14 V
t2-5 (SG-3) - Body ground - Ground for sensor Always Below 1 Ω
t2-6 (TE) - t2-5 (SG-3) - No. 1 cooler thermistor signal
·

Ignition switch ON

·

A/C switch: On

·

Evaporator temperature: 0°C (32°F)


1.7 to 2.1 V
·

Ignition switch ON

·

A/C switch: On

·

Evaporator temperature: 15°C (59°F)


0.9 to 1.3 V

*1: w/ PTC Heater

*2: w/ Viscous Heater

*3: w/ Idle Up Switch

*4: w/ Ion Generator

*5: w/ Integration Control Panel (for Rear Automatic Air Conditioning)

*6: w/ Integration Control Panel (for Rear Automatic Cooler)

*7: w/ Condenser Blower Motor



e.
E334619E01
0.292,1.552 0.75,1.75 0.458,0.198 10 false GND

Waveform 1:

Item Content
Terminal No. N42-7 (LIN1) - Body ground
N79-18 (RNIN) - Body ground*
Tool Setting 2 V/DIV., 20 μs./DIV.
Vehicle Condition Ignition switch ON

*: w/ Integration Control Panel



f.
E349844E01
2.792,1.656 3.135,1.865 0.344,0.208 10 false GND

Waveform 2:

Item Content
Terminal No. N42-21 (BLW) - Body ground
N44-10 (BLWH) - Body ground*
Tool Setting 1 V/DIV., 500 μs./DIV.
Vehicle Condition
·

Ignition switch ON

·

Blower switch: LO



*: w/ Integration Control Panel



g.
E202803E08
0.313,1.448 0.729,1.646 0.417,0.198 10 false GND

Waveform 3:

Item Content
Terminal No. t2-3 (BUS) - t2-2 (BUSG)
N44-7 (RBUS) - N44-3 (RBUG)*
Tool Setting 2 V/DIV., 20 μs./DIV.
Vehicle Condition Ignition switch ON

*: w/ Integration Control Panel (for Rear Automatic Air Conditioning)



h.
E116941N06
0.177,0.948 0.542,1.146 0.365,0.198 10 false GND

Waveform 4:

Item Content
Terminal No. N43-12 (LOCK) - Body ground
Tool Setting 200 mV/DIV., 10 ms./DIV.
Condition
·

Engine running

·

Blower switch: LO

·

A/C switch: On





AIR CONDITIONING CONTROL ASSEMBLY


E389743N02
3.354,0.167 3.854,0.417 0.5,0.25 3.469,0.208 3.927,0.406 0.458,0.198 10 false N55

a.

Disconnect the N55 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
N55-13 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
N55-9 (IG+) - Body ground GR - Body ground Power source (IG) Ignition switch off Below 1 V
Ignition switch ON 11 to 14 V


c.

Reconnect the N55 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
N55-7 (LIN1) - Body ground V - Body ground LIN communication Ignition switch ON Pulse generation
(See waveform 1)


e.
E334619E01
0.292,1.552 0.75,1.75 0.458,0.198 10 false GND

Waveform 1:

Item Content
Terminal No. N55-7 (LIN1) - Body ground
Tool Setting 2 V/DIV., 20 μs./DIV.
Vehicle Condition Ignition switch ON



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


E418840N01
1.448,0.25 1.948,0.5 0.5,0.25 1.573,0.292 2.031,0.49 0.458,0.198 10 false a17

a.

Disconnect the a17 integration control and panel 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
a17-6 (E) - Body ground LA - Body ground Ground Always Below 1 Ω
a17-5 (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 a17 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
a17-7 (RLIN) - Body ground Y - Body ground LIN communication Ignition switch ON Pulse generation
(See waveform 1)
a17-8 (CXPI) - Body ground GR - Body ground CXPI communication Ignition switch ON Pulse generation
(See waveform 2)


e.
E334619E01
0.292,1.552 0.75,1.75 0.458,0.198 10 false GND

Waveform 1:

Item Content
Terminal No. a17-7 (RLIN) - Body ground
Tool Setting 2 V/DIV., 20 μs./DIV.
Vehicle Condition Ignition switch ON


f.
E421588E01
0.115,1.531 0.573,1.729 0.458,0.198 10 false GND

Waveform 2:

Item Content
Terminal No. a17-8 (CXPI) - Body ground
Tool Setting 2 V/DIV., 20 μs./DIV.
Vehicle Condition Ignition switch ON



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