RM38N0EC _58 Vehicle Interior _111841 HEATING / AIR CONDITIONING _0499788 AIR CONDITIONING SYSTEM(for Gasoline Model) U

HEATING / AIR CONDITIONING  AIR CONDITIONING SYSTEM(for Gasoline Model)  TERMINALS OF ECU  


CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY


w/o Seat Heater System:
E444900N01
2.208,0.531 2.635,0.792 0.427,0.26 3.667,0.51 4.094,0.771 0.427,0.26 4.875,0.51 5.302,0.771 0.427,0.26 5.031,0.573 5.344,0.771 0.313,0.198 10 false z1 3.781,0.583 4.24,0.781 0.458,0.198 10 false E44 2.323,0.604 2.781,0.802 0.458,0.198 10 false E45

w/ Seat Heater System:
E444901N01
0.688,0.5 1.104,0.76 0.417,0.26 2.146,0.49 2.563,0.75 0.417,0.26 3.667,0.479 4.083,0.74 0.417,0.26 5.115,0.469 5.531,0.729 0.417,0.26 6.313,0.469 6.729,0.729 0.417,0.26 6.448,0.542 6.76,0.74 0.313,0.198 10 false z1 5.219,0.552 5.677,0.75 0.458,0.198 10 false E44 3.76,0.552 4.219,0.75 0.458,0.198 10 false E45 2.25,0.563 2.708,0.76 0.458,0.198 10 false E46 0.781,0.573 1.24,0.771 0.458,0.198 10 false E47

Channel 1 (z1)
Terminal No.
(Symbol) 		Terminal Description Condition Specified Condition
z1-2 (BUS G) - Body ground Ground for BUS IC Always Below 1 Ω
z1-3 (BUS) - z1-2 (BUS G) BUS IC control signal Ignition switch ON Pulse generation
(See waveform "Servo LIN communication")
z1-4 (B BUS) - z1-2 (BUS G) Power supply for BUS IC Ignition switch off 11 to 14 V
z1-5 (SGA) - Body ground Ground for evaporator temp. sensor (No. 1 cooler thermistor) Always Below 1 Ω
z1-6 (TEA) - z1-5 (SGA) Evaporator temp. sensor (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

Channel 2 (E44)
Terminal No.
(Symbol) 		Terminal Description Condition Specified Condition

*: w/ Ion Generator

E44-2 (CANH) - E44-1 (CANL) CAN communication system Ignition switch ON Pulse generation
E44-5 (B) - E44-17 (GND) Power source (Back-up) Ignition switch off 11 to 14 V
E44-4 (NAIN) - E44-17 (GND)* Ion generator sub-assembly operation condition signal
·

Ignition switch ON

·

Blower switch: On


Below 2.2 V
·

Ignition switch ON

·

Blower switch: Off


4.75 to 5.25 V
E44-6 (IG+) - E44-17 (GND) Power source (IG) Ignition switch ON 11 to 14 V
Ignition switch off Below 1 V
E44-7 (LIN1) - E44-17 (GND) LIN communication signal Ignition switch ON Pulse generation
(See waveform "Control panel LIN communication")
E44-8 (SCLI) - E44-17 (GND) LIN communication signal Ignition switch ON Pulse generation
(See waveform "PM Sensor LIN communication")
E44-17 (GND) - Body ground Ground for main power supply Always Below 1 Ω
E44-21 (BLW) - E44-17 (GND) Blower motor speed control signal
·

Ignition switch ON

·

Blower switch: LO


Pulse generation
(See waveform "Blower")
E44-24 (NANO) - E44-17 (GND)* Ion generator sub-assembly operation signal
·

Ignition switch ON

·

Blower switch: On


Below 1 V
·

Ignition switch ON

·

Blower switch: Off


4.75 to 5.25 V

Channel 3 (E45)
Terminal No.
(Symbol) 		Terminal Description Condition Specified Condition
E45-1 (TAM) - E45-14 (SG-2) Ambient temp. sensor (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
E45-3 (SG-1) - Body ground Ground for room temp. sensor (cooler thermistor) Always Below 1 Ω
E45-5 (TR) - E45-3 (SG-1) Room temp. sensor (cooler thermistor) signal
·

Ignition switch ON

·

Cabin temperature: 25°C (77°F)


1.05 to 1.45 V
·

Ignition switch ON

·

Cabin temperature: 40°C (104°F)


0.64 to 0.87 V
E45-6 (PRE) - E45-15 (SG-4) Air conditioner pressure sensor signal
·

Ignition switch ON (Engine running)

·

Air conditioning system operating

·

Refrigerant pressure: Normal pressure (less than 3025 kPaG (30.8 kgf/cm2, 439 psi) and more than 176 kPaG (1.8 kgf/cm2, 26 psi))


0.74 to 4.61 V
E45-11 (S5-3) - E45-15 (SG-4) Power supply for air conditioner pressure sensor Ignition switch ON 4.75 to 5.25 V
Ignition switch off Below 1 V
E45-14 (SG-2) - Body ground Ground for ambient temp. sensor (thermistor assembly) Always Below 1 Ω
E45-15 (SG-4) - Body ground Ground for air conditioner pressure sensor Always Below 1 Ω

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

Waveform "Blower":

Item Content
Terminal No. E44-21 (BLW) - E44-17 (GND)
Tool Setting 2 V/DIV., 1 ms./DIV.
Condition
·

Ignition switch ON

·

Blower switch: LO



HINT:

The waveform varies with the blower speed.



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

Waveform "Control panel LIN communication":

Item Content
Terminal No. E44-7 (LIN1) - E44-17 (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 "Servo LIN communication":

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


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

Waveform "PM Sensor LIN communication":

Item Content
Terminal No.
·

E44-8 (SCLI) - E44-17 (GND)


Tool Setting 2 V/DIV., 20 ms./DIV.
Condition Ignition switch ON



CHECK AIR CONDITIONING CONTROL ASSEMBLY


E444902N01
3.365,0.344 3.781,0.615 0.417,0.271 3.469,0.406 3.927,0.604 0.458,0.198 10 false E22

Terminal No.
(Symbol) 		Terminal Description Condition Specified Condition
E22-7 (LIN1) - Body ground LIN communication signal Ignition switch ON Pulse generation
(See waveform)
E22-9 (IG+) - E22-13 (GND) Power source (IG) Ignition switch off Below 1 V
Ignition switch ON 10.5 to 16 V
E22-13 (GND) - Body ground Ground for air conditioning control assembly Always Below 1 Ω

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

Waveform:

Item Content
Terminal No. E22-7 (LIN1) - Body ground
Tool Setting 2 V/DIV., 20 ms./DIV.
Condition Ignition switch ON