Air Conditioning System (For Automatic Air Conditioning System) Terminals Of Ecu

Vehicle Interior. Corolla. Zre142 Aze141
Heating Air Conditioning. Corolla. Zre142 Aze141

  1. A/C AMPLIFIER

  1. A/C CONTROL ASSEMBLY

Air Conditioning System (For Automatic Air Conditioning System) -- Terminals Of Ecu



A/C AMPLIFIER

Corolla. Zre142 Aze141.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Terminals Of Ecu

HINT:
Check from the rear of the connector while it is connected to the A/C amplifier.

Terminal No.
(Symbol)
Wiring Color
Terminal Description
Condition
Specified Condition
E30-1 (IG+) - E30-14 (GND)
Y - W-B*1
R - W-B*2
Power source (IG)
Ignition switch: ON
11 to 14 V
E30-1 (IG+) - E30-14 (GND)
Y - W-B*1
R - W-B*2
Power source (IG)
Ignition switch: off
Below 1 V
E30-2 (SOL+) - E30-14 (GND)
LG - W-B*1
V - W-B*2
Compressor assembly with pulley operation signal
Engine running
A/C switch: ON
Blower switch: LO
Pulse generation
(See waveform 1)
E30-3 (PTC1) - E30-14 (GND)*3
W - W-B*1
P - W-B*2
PTC heater operation signal
Engine running (1250 rpm or higher)
Temperature setting: MAX. HOT
Ambient temperature: 10°C (50°F) or lower
Engine coolant temperature: 75°C (167°F) or lower
Light control switch: OFF
Blower switch: ON
11 to 14 V
E30-7 (FLOQ) - E30-35 (SG-4)*4
R - W
A/C flow sensor signal
Ignition switch: ON
A/C switch: OFF
3.8 to 4.2 V
E30-7 (FLOQ) - E30-35 (SG-4)*4
R - W
A/C flow sensor signal
Ignition switch: ON
A/C switch: ON
Blower switch: HI
0.7 to 3.8 V
E30-9 (PRE) - E30-13 (SG-2)
L - G
A/C pressure sensor signal
Engine running, A/C system operating, Refrigerant pressure: Abnormal pressure (more than 3140 kPa (32.0 kgf/cm2, 455 psi))
4.848 V or higher
E30-9 (PRE) - E30-13 (SG-2)
L - G
A/C pressure sensor signal
Engine running, A/C system operating, Refrigerant pressure: Abnormal pressure (less than 196 kPa (2.0 kgf/cm2, 28 psi))
Below 0.734 V
E30-9 (PRE) - E30-13 (SG-2)
L - G
A/C pressure sensor signal
Engine running, A/C system operating, Refrigerant pressure: Normal pressure (less than 3140 kPa (32.0 kgf/cm2, 455 psi) and more than 196 kPa (2.0 kgf/cm2, 28 psi))
0.734 to 4.848 V
E30-10 (S5-3) - E30-13 (SG-2)
B - G
Power supply for A/C pressure sensor
Ignition switch: ON
4.75 to 5.25 V
E30-10 (S5-3) - E30-13 (SG-2)
B - G
Power supply for A/C pressure sensor
Ignition switch: off
Below 1 V
E30-11 (CANH) - E30-12 (CANL)
V - W
CAN communication circuit
Ignition switch: ON
Pulse generation
E30-13 (SG-2) - Body ground
G - Body ground
Ground for A/C pressure sensor
Always
Below 1 V
E30-14 (GND) - Body ground
W-B - Body ground
Ground for main power supply
Always
Below 1 V
E30-21 (B) - E30-14 (GND)
W - W-B*1
BR - W-B*2
Power source (Back-up)
Always
11 to 14 V
E30-22 (PTC2) - E30-14 (GND)*3
B - W-B
PTC heater operation signal
Engine running (1250 rpm or higher)
Temperature setting: MAX. HOT
Ambient temperature: 10°C (50°F) or lower
Engine coolant temperature: 70°C (158°F) or lower
Light control switch: OFF
Blower switch: ON
11 to 14 V
E30-23 (BLW) - E30-14 (GND)
R - W-B*1
L - W-B*2
Blower motor speed control signal
Ignition switch: ON
Blower switch: ON
Pulse generation
(See waveform 2)
E30-25 (ALT) - E30-14 (GND)*3
L - W-B
Alternator signal (PTC Heater line control)
Engine started
Pulse generation
E30-27 (HLS) - E30-14 (GND)*3
B - W-B*1
V - W-B*2
Headlight signal (PTC Heater line control)
Engine started
Headlight switch: OFF
11 to 14 V
E30-27 (HLS) - E30-14 (GND)*3
B - W-B*1
V - W-B*2
Headlight signal (PTC Heater line control)
Engine started
Headlight switch: ON
Below 1 V
E30-29 (TR) - E30-34 (SG-1)
GR - V*1,
W - SB*2
Room temperature sensor signal
Ignition switch: ON
Cabin temperature at 25°C (77°F)
1.8 to 2.2 V
E30-29 (TR) - E30-34 (SG-1)
GR - V*1,
W - SB*2
Room temperature sensor signal
Ignition switch: ON
Cabin temperature at 40°C (104°F)
1.2 to 1.6 V
E30-30 (S5-1) - E30-35 (SG-4)*4
B - W
Power supply for A/C flow sensor
Ignition switch: ON
4.5 to 5.5 V
E30-30 (S5-1) - E30-35 (SG-4)*4
B - W
Power supply for A/C flow sensor
Ignition switch: off
Below 1 V
E30-31 (S5-4) - E30-14 (GND)
LG - W-B*1
Y - W-B*2
Solar sensor power source
Ignition switch: ON
4.5 to 5.5 V
E30-31 (S5-4) - E30-14 (GND)
LG - W-B*1
Y - W-B*2
Solar sensor power source
Ignition switch: off
Below 1 V
E30-33 (TS) - E30-14 (GND)
P - W-B*1
R - W-B*2
Solar sensor signal
Ignition switch: ON
Solar sensor subjected to light.
0.8 to 4.3 V
E30-33 (TS) - E30-14 (GND)
P - W-B*1
R - W-B*2
Solar sensor signal
Ignition switch: ON
Solar sensor covered with cloth.
Below 0.8 V
E30-34 (SG-1) - Body ground
V - Body ground*1
SB - Body ground*2
Ground for room temperature sensor
Always
Below 1 V
E30-35 (SG-4) - Body ground*4
W - Body ground
Ground for A/C flow sensor
Always
Below 1 V
E30-37 (LIN1) - E30-14 (GND)
SB - W-B*1
LG - W-B*2
LIN communication signal
Ignition switch: ON
Pulse generation
E30-38 (RDFG) - E30-14 (GND)
B - W-B*1
BE - W-B*2
DEF relay signal
Ignition switch: ON
REAR DEF switch: ON
Below 1 V
E30-38 (RDFG) - E30-14 (GND)
B - W-B*1
BE - W-B*2
DEF relay signal
Ignition switch: ON
REAR DEF switch: OFF
11 to 14 V
X1-2 (BUS G) - Body ground
-
Ground for BUS IC
Always
Below 1 V
X1-3 (BUS) - X1-2 (BUS G)
-
BUS IC control signal
Ignition switch off → ON
Pulse generation
X1-4 (B BUS) - X1-2 (BUS G)
-
Power supply for BUS IC
Always
11 to 14 V
X1-5 (SGA) - Body ground
-
Ground for evaporator temperature sensor
Always
Below 1 V
X1-6 (TEA) - X1-5 (SGA)
-
Evaporator temperature sensor signal
Ignition switch: ON
Evaporator temperature at 0°C (32°F)
1.7 to 2.1 V
X1-6 (TEA) - X1-5 (SGA)
-
Evaporator temperature sensor signal
Ignition switch: ON
Evaporator temperature at 15°C (59°F)
0.9 to 1.3 V
  1. *1: for TMC Made
  2. *2: except TMC Made
  3. *3: w/ PTC Heater Assembly
  4. *4: for 2ZR-FE


    Corolla. Zre142 Aze141.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Terminals Of Ecu

  1. Waveform 1

    Item
    		Content
    Terminal No. (Symbol)
    		E30-2 (SOL+) - E30-14 (GND)
    Tool Setting
    		5 V/DIV., 500 μs./DIV.
    Vehicle Condition
    		Engine is running
    A/C switch: ON
    Blower Switch: LO


    2. Corolla. Zre142 Aze141.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Terminals Of Ecu

  2. Waveform 2

    Item
    		Content
    Terminal No. (Symbol)
    		E30-23 (BLW) - E30-14 (GND)
    Tool Setting
    		1 V/DIV., 500 μs./DIV.
    Vehicle Condition
    		Ignition switch ON
    Blower switch: ON

A/C CONTROL ASSEMBLY

Corolla. Zre142 Aze141.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Terminals Of Ecu

HINT:
Check from the rear of the connector while it is connected to the A/C control assembly.

Terminal No.
(Symbol)
Wiring Color
Terminal Description
Condition
Specified Condition
E16-2 (GND) - Body ground
W-B - Body ground
Ground for A/C control assembly
Always
Below 1 V
E16-3 (LIN1) - E16-2 (GND)
SB - W-B*1
LG - W-B*2
LIN communication circuit
Ignition switch: ON
Pulse generation
E16-5 (IG+) - E16-2 (GND)
B - W-B*1
V - W-B*2
Power source (IG)
Ignition switch: off
Below 1 V
E16-5 (IG+) - E16-2 (GND)
B - W-B*1
V - W-B*2
Power source (IG)
Ignition switch: ON
11 to 14 V
  1. *1: for TMC Made
  2. *2: except TMC Made