RM38T0EC _58 Vehicle Interior _104612 HEATING / AIR CONDITIONING _0601796 AIR CONDITIONING SYSTEM(for HEV Model) U

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


CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY


E417909C12
2.844,0.5 3.208,0.729 0.365,0.229 3.854,0.5 4.219,0.729 0.365,0.229 4.792,0.531 5.156,0.76 0.365,0.229 4.792,0.188 5.156,0.417 0.365,0.229 2.948,0.521 3.406,0.719 0.458,0.198 10 false l48 3.948,0.531 4.406,0.729 0.458,0.198 10 false l49 4.906,0.208 5.365,0.406 0.458,0.198 10 false z1 4.885,0.552 5.344,0.75 0.458,0.198 10 false m6 5.24,0.188 5.688,0.469 0.448,0.281 12 false *A 5.24,0.531 5.688,0.813 0.448,0.281 12 false *B
*A w/ Rear Air Duct *B w/o Rear Air Duct


HINT:
·

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

·

Make sure to wait at least 2 minutes after turning the ignition switch off before performing an ECU terminal inspection.



Terminal No.
(Symbol) 		Terminal Description Condition Specified Condition
I48-1 (TAM) - Body ground 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
I48-3 (SG-1) - Body ground Ground for cooler thermistor (room temperature sensor) Always Below 1 V
I48-5 (TR) - I49-17 (GND) Cooler thermistor (room temperature sensor) 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
I48-6 (PRE) - I49-17 (GND) Air conditioner pressure sensor signal
·

Ignition switch ON (READY)

·

Air conditioning system operating

·

Refrigerant pressure: Abnormal pressure (more than 2812 kPa (28.7 kgf/cm2, 408 psi)


4.61 V or higher*1
·

Ignition switch ON (READY)

·

Air conditioning system operating

·

Refrigerant pressure: Abnormal pressure (less than 196 kPa (2.0 kgf/cm2, 28 psi))


Below 0.74 V*1
·

Ignition switch ON (READY)

·

Air conditioning system operating

·

Refrigerant pressure: Normal pressure (less than 2812 kPa (28.7 kgf/cm2, 408 psi) and more than 196 kPa (2.0 kgf/cm2, 28 psi))


0.74 to 4.61 V*1
I48-11 (S5-3) - I49-17 (GND) 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 Ground for thermistor assembly Always Below 1 V
I48-15 (SG-4) - Body ground Ground for air conditioner pressure sensor Always Below 1 V
I49-1 (CANL) - I49-2 (CANH) CAN communication system CAN communication is performed Pulse generation
I49-4 (NAIN) - Body ground*2 Ion generator sub-assembly operation signal
·

Ignition switch ON

·

Blower switch: On


Below 2.2 V
·

Ignition switch ON

·

Blower switch: Off


4.75 to 5.25 V
I49-5 (B) - I49-17 (GND) Power source (Back-up) Ignition switch off 11 to 14 V
I49-6 (IG+) - I49-17 (GND) Power source (IG) Ignition switch ON 11 to 14 V
Ignition switch off Below 1 V
I49-7 (LIN1) - I49-17 (GND) LIN communication signal Ignition switch ON Pulse generation
(See waveform 1)
I49-17 (GND) - Body ground Ground for main power supply Always Below 1 V
I49-21 (BLW) - I49-17 (GND) Blower motor speed control signal
·

Ignition switch ON

·

Blower switch: LO


Pulse generation
(See waveform 2)
I49-24 (NANO) - Body ground*2 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
z1-2 (BUS G) - Body ground*3
m6-2 (BUSG) - Body ground*4 		Ground for BUS IC Always Below 1 V
z1-3 (BUS) - z1-2 (BUS G)*3
m6-3 (BUS) - m6-2 (BUSG)*4 		BUS IC control signal Ignition switch ON Pulse generation
(See waveform 3)
z1-4 (B BUS) - z1-2 (BUS G)*3
m6-4 (BUSB) - m6-2 (BUSG)*4 		Power supply for BUS IC Ignition switch off 11 to 14 V
z1-5 (SGA) - Body ground*3
m6-5 (SG-3) - Body ground*4 		Ground for No. 1 cooler thermistor Always Below 1 V
z1-6 (TEA) - z1-5 (SGA)*3
m6-6 (TE) - m6-5 (SG-3)*4 		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: While sensor voltage is 5 V.

*2: w/ Ion Generator

*3: w/ Rear Air Duct

*4: w/o Rear Air Duct


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

Waveform 1:

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


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

Waveform 2:

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




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

Waveform 3:

Item Content
Terminal No. z1-3 (BUS) - z1-2 (BUS G)
Tool Setting 2 V/DIV., 2 ms./DIV.
Condition Ignition 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) 		Terminal Description Condition Specified Condition
I37-7 (LIN1) - Body ground LIN communication signal Ignition switch ON Pulse generation
(See waveform)
I37-9 (IG+) - I37-13 (GND) Power source (IG) Ignition switch off Below 1 V
Ignition switch ON 11 to 14 V
I37-13 (GND) - Body ground Ground for air conditioning control assembly 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