RM3660EC _58 Vehicle Interior _080733 HEATING / AIR CONDITIONING _0598792 AIR CONDITIONING SYSTEM(for HV Model (8ZR-FXE)) U

HEATING / AIR CONDITIONING  AIR CONDITIONING SYSTEM(for HV Model (8ZR-FXE))  TERMINALS OF ECU  


CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY


E444900
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 4.958,0.563 5.323,0.792 0.365,0.229 10 false I206 3.781,0.563 4.24,0.76 0.458,0.198 10 false I49 2.313,0.583 2.771,0.781 0.458,0.198 10 false z26

HINT:

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


Channel 1 (I206)
Terminal No.
(Symbol) 		Terminal Description Condition Specified Condition

*: w/ Ion generator sub-assembly

I206-1 (GND) - Body ground Ground for main power supply Always Below 1 Ω
I206-2 (NANO) - I206-1 (GND)* Ion generator sub-assembly operation signal
·

Ignition switch ON

·

Blower switch: ON → OFF


Below 1 V → 4.75 to 5.25 V
I206-3 (B) - I206-1 (GND) Power source (Back-up) Ignition switch off 11 to 14 V
I206-4 (IG+) - I206-1 (GND) Power source (IG) Ignition switch ON 11 to 14 V
Ignition switch off Below 1 V
I206-7 (BLW) - I206-1 (GND) Blower motor speed control signal
·

Ignition switch ON

·

Blower switch: LO


Pulse generation
(See waveform "Blower")

Channel 2 (I49)
Terminal No.
(Symbol) 		Terminal Description Condition Specified Condition

*: w/ Ion generator sub-assembly

I49-1 (CANL) - I49-2 (CANH) CAN communication system Ignition switch ON Pulse generation
I49-3 (TAM) - I49-24 (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
I49-4 (TR) - I49-23 (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
I49-7 (LIN1) - I206-1 (GND) LIN communication signal Ignition switch ON Pulse generation
(See waveform "Control panel LIN communication")
I49-13 (SG-4) - Body ground Ground for air conditioning pressure sensor Always Below 1 Ω
I49-15 (S5-3) - I49-13 (SG-4) Power supply for air conditioning pressure sensor Ignition switch ON 4.75 to 5.25 V
Ignition switch off Below 1 V
I49-16 (PRE) - I49-13 (SG-4) Air conditioning pressure sensor signal
·

Ignition switch ON (READY)

·

Air conditioning system operating

·

Refrigerant pressure: Normal pressure


0.74 to 4.61 V
I49-23 (SG-1) - Body ground Ground for room temp. sensor (cooler thermistor) Always Below 1 Ω
I49-24 (SG-2) - Body ground Ground for ambient temp. sensor (thermistor assembly) Always Below 1 Ω
I49-26 (NAIN) - I206-1 (GND)* Ion generator sub-assembly operation condition signal
·

Ignition switch ON

·

Blower switch: ON → OFF


Below 2.2 V → 4.75 to 5.25 V

Channel 3 (z26)
Terminal No.
(Symbol) 		Terminal Description Condition Specified Condition
z26-1 (MODE_pot) - z26-16 (SG-Pots/TE) Front mode damper position potentiometer signal input
·

Ignition switch ON

·

Mode switch: DEF


0.4 to 0.6 V
·

Ignition switch ON

·

Mode switch: FACE


3.49 to 3.69 V
z26-2 (MOF) - I206-1 (GND) Front mode servo motor drive output (FOOT)
·

Ignition switch ON

·

Mode switch: DEF to FACE


11 to 14 V
(Servo motor operating)
z26-3 (TE) - z26-16 (SG-Pots/TE) 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
z26-4 (R/F_pot) - z26-16 (SG-Pots/TE) Recirculation/Fresh damper position potentiometer signal input
·

Ignition switch ON

·

Recirculation/Fresh switch: Fresh


2.93 to 3.13 V
·

Ignition switch ON

·

Recirculation/Fresh switch: Recirculation


4.4 to 4.6 V
z26-5 (A/MDr_pot) - z26-16 (SG-Pots/TE) Air mix damper position potentiometer signal input
·

Ignition switch ON

·

Set temperature switch: MAX COOL


4.4 to 4.6 V
·

Ignition switch ON

·

Set temperature switch: MAX HOT


0.43 to 0.63 V
z26-6 (RrMODE_pot) - z26-16 (SG-Pots/TE) Rear mode damper position potentiometer signal input
·

Ignition switch ON

·

Mode switch: DEF


4.4 to 4.6 V
·

Ignition switch ON

·

Mode switch: FACE


0.86 to 1.06 V
z26-11 (MOD) - I206-1 (GND) Front mode servo motor drive output (DEF)
·

Ignition switch ON

·

Mode switch: FACE to DEF


11 to 14 V
(Servo motor operating)
z26-12 (AMC) - I206-1 (GND) Air mix servo motor drive output (COOL)
·

Ignition switch ON

·

Set temperature switch: MAX HOT to MAX COOL


11 to 14 V
(Servo motor operating)
z26-13 (AMH) - I206-1 (GND) Air mix servo motor drive output (HOT)
·

Ignition switch ON

·

Set temperature switch: MAX COOL to MAX HOT


11 to 14 V
(Servo motor operating)
z26-14 (S5-Pots) - z26-16 (SG-Pots/TE) Servo motor potentiometer circuit power source Ignition switch ON 4.75 to 5.25 V
Ignition switch off Below 1 V
z26-16 (SG-Pots/TE) - Body ground
·

Servo motor potentiometer circuit ground

·

Ground for evaporator temp. sensor (No. 1 cooler thermistor)


Always Below 1 Ω
z26-18 (REC) - I206-1 (GND) Recirculation/Fresh servo motor drive output (REC)
·

Ignition switch ON

·

Recirculation/Fresh switch: Fresh to Recirculation


11 to 14 V
(Servo motor operating)
z26-19 (FRS) - I206-1 (GND) Recirculation/Fresh servo motor drive output (FRS)
·

Ignition switch ON

·

Recirculation/Fresh switch: Recirculation to Fresh


11 to 14 V
(Servo motor operating)
z26-20 (RRF) - I206-1 (GND) Rear mode servo motor drive output (FOOT)
·

Ignition switch ON

·

Mode switch: DEF to FACE


11 to 14 V
(Servo motor operating)
z26-21 (RRD) - I206-1 (GND) Rear mode servo motor drive output (DEF)
·

Ignition switch ON

·

Mode switch: FACE to DEF


11 to 14 V
(Servo motor operating)

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

Waveform "Blower":

Item Content
Terminal No. I206-7 (BLW) - I206-1 (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. I49-7 (LIN1) - I206-1 (GND)
Tool Setting 2 V/DIV., 20 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

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

Waveform:

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



HYBRID VEHICLE CONTROL ECU


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