Air Conditioning System Terminals Of Ecu

Heater & Air Conditioning System. Camry. Acv40 Gsv40
Air Conditioning. Camry. Acv40 Gsv40

  1. A/C AMPLIFIER

  1. A/C CONTROL ASSEMBLY (HEATER CONTROL BASE SUB-ASSEMBLY)

Air Conditioning System -- Terminals Of Ecu



A/C AMPLIFIER
*1: For 2GR-FE

Camry. Acv40 Gsv40.Air Conditioning.Air Conditioning System.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.
(Symbols)
Wiring Color
Terminal Description
Condition
Specified Condition
E38-1 (IG+) - E38-14 (GND)
V - W-B
Power source (IG)
Ignition switch: ON
10 to 14 V
E38-1 (IG+) - E38-14 (GND)
V - W-B
Power source (IG)
Ignition switch: LOCK
Below 1 V
E38-2 (SOL+) - E38-14 (GND)
W - W-B
A/C compressor operation signal
Engine is running
A/C switch: ON
Blower switch: LO
Pulse generation
(See waveform 1)
E38-5 (TAM) - E38-14 (GND)
P - W-B
A/C ambient temperature sensor signal
Ignition switch: ON at 25°C (77°F)
1.35 to 1.75 V
E38-5 (TAM) - E38-14 (GND)
P - W-B
A/C ambient temperature sensor signal
Ignition switch: ON at 40°C (104°F)
0.9 to 1.2 V
E38-8 (LOCK)*1 - E38-14 (GND)
G - W-B
A/C compressor lock sensor signal
Engine is running
Blower switch: LO
A/C switch: ON
Pulse generation
(See waveform 2)
E38-9 (PRE) - E38-13 (SG-2)
V - L
A/C pressure sensor signal
Start engine, Operate A/C system, Refrigerant pressure: Abnormal pressure (more than 3,140 kPa (32.0 kgf/cm2, 455 psi))
4.74 V or higher
E38-9 (PRE) - E38-13 (SG-2)
V - L
A/C pressure sensor signal
Start engine, Operate A/C system, Refrigerant pressure: Abnormal pressure (less than 196 kPa (2.0 kgf/cm2, 28 psi))
Below 0.76 V
E38-9 (PRE) - E38-13 (SG-2)
V - L
A/C pressure sensor signal
Start engine, Operate A/C system, Refrigerant pressure: Abnormal pressure (more than 3,140 kPa (32.0 kgf/cm2, 455 psi) and less than 196 kPa (2.0 kgf/cm2, 28 psi))
0.76 to 4.74 V
E38-10 (S5-3) - E38-13 (SG-2)
BR - L
Power supply for A/C pressure sensor
Ignition switch: ON
A/C switch: ON
4.5 to 5.5 V
E38-10 (S5-3) - E38-13 (SG-2)
BR - L
Power supply for A/C pressure sensor
Ignition switch: ON
A/C switch: OFF
Below 1 V
E38-11 (CANH) - E38-12 (CANL)
B - W
CAN communication system
CAN communication circuit
Pulse generation
E38-13 (SG-2) - Body ground
L - Body ground
Ground for A/C pressure sensor, A/C ambient temperature sensor, A/C lock sensor
Always
Below 1 V
E38-14 (GND) - Body ground
W-B - Body ground
Ground for main power supply
Always
Below 1 V
E38-20 (MGC)*1 - E38-14 (GND)
LG - W-B
A/C compressor magnetic clutch operation signal
Ignition switch: ON
Blower switch: LO
A/C switch: OFF
10 to 14 V
E38-20 (MGC)*1 - E38-14 (GND)
LG - W-B
A/C compressor magnetic clutch operation signal
Ignition switch: ON
Blower switch: LO
A/C switch: ON
Below 1 V
E38-21 (B) - E38-14 (GND)
GR - W-B
Power source (Back-up)
Always
10 to 14 V
E38-23 (BLW) - E38-14 (GND)
R - W-B
Blower motor speed control signal
Ignition switch: ON
Blower switch: ON
Pulse generation
(See waveform 3)
E38-29 (TR) - E38-34 (SG-1)
P - LG
A/C room temperature sensor signal
Ignition switch: ON
Cabin temperature at 25°C (77°F)
1.8 to 2.2 V
E38-29 (TR) - E38-34 (SG-1)
P - LG
A/C room temperature sensor signal
Ignition switch: ON
Cabin temperature at 40°C (104°F)
1.2 to 1.6 V
E38-32 (TSP) - E38-14 (GND)
Y - W-B
A/C solar sensor signal (for Front passenger side)
Ignition switch: ON
Solar sensor is subjected to electric light.
0.8 to 4.3 V
E38-32 (TSP) - E38-14 (GND)
Y - W-B
A/C solar sensor signal (for Front passenger side)
Ignition switch: ON
Solar sensor is covered with a cloth.
Below 0.8 V
E38-33 (TSD) - E38-14 (GND)
O - W-B
A/C solar sensor signal (for Driver side)
Ignition switch: ON
Solar sensor is subjected to electric light.
0.8 to 4.3 V
E38-33 (TSD) - E38-14 (GND)
O - W-B
A/C solar sensor signal (for Driver side)
Ignition switch: ON
Solar sensor is covered with a cloth.
Below 0.8 V
E38-34 (SG-1) - Body ground
LG - Body ground
Ground for A/C room temperature sensor
Always
Below 1 V
E38-37 (LIN1) - E38-14 (GND)
GR - W-B
LIN communication signal
Ignition switch: ON
Pulse generation
E38-38 (RDFG) - E38-14 (GND)
G - W-B
DEF relay signal
Ignition switch: ON
REAR DEF switch: ON
Below 1 V
E38-38 (RDFG) - E38-14 (GND)
G - W-B
DEF relay signal
Ignition switch: ON
REAR DEF switch: OFF
10 to 14 V
E38-39 (PCD1) - E38-14 (GND)
R - W-B
PlasmaclusterTM operation signal
(CLEAN mode)
Ignition switch: ON
Blower switch: OFF
(plasmaclusterTM not operating)
10 to 14 V
E38-39 (PCD1) - E38-14 (GND)
R - W-B
PlasmaclusterTM operation signal
(CLEAN mode)
Ignition switch: ON
Blower switch: ON
(plasmaclusterTM operating)
Below 1 V
E38-40 (PCD2) - E38-14 (GND)
B - W-B
PlasmaclusterTM operation signal
(ION mode)
Ignition switch: ON
Blower switch: OFF
(plasmaclusterTM not operating)
10 to 14 V
E38-40 (PCD2) - E38-14 (GND)
B - W-B
PlasmaclusterTM operation signal
(ION mode)
Ignition switch: ON
Blower switch: ON
(plasmaclusterTM operating)
Below 1 V
e1-2 (BUS G) - Body ground
-
Ground for BUS IC
Always
Below 1 V
e1-3 (BUS) - e1-2 (BUS G)
-
BUS IC control signal
Ignition switch: LOCK → ON
Pulse generation
e1-4 (B BUS) - e1-2 (BUS G)
-
Power supply for BUS IC
Ignition switch: LOCK
Below 1 V
e1-4 (B BUS) - e1-2 (BUS G)
-
Power supply for BUS IC
Ignition switch: ON
10 to 14 V
e1-5 (SGA) - Body ground
-
Ground for evaporator temperature sensor
Always
Below 1 V
e1-6 (TEA) - e1-5 (SGA)
-
A/C evaporator temperature sensor signal
Ignition switch: ON
Evaporator temperature at 0°C (32°F)
1.7 to 2.1 V
e1-6 (TEA) - e1-5 (SGA)
-
A/C evaporator temperature sensor signal
Ignition switch: ON
Evaporator temperature at 15°C (59°F)
0.9 to 1.3 V


    Camry. Acv40 Gsv40.Air Conditioning.Air Conditioning System.Air Conditioning System Terminals Of Ecu

  1. Waveform 1:

    Item
    		Contents
    Terminal No. (Symbols)
    		E38-2 (SOL+) - E38-14 (GND)
    Tool Setting
    		5 V/DIV., 500 μs/DIV.
    Vehicle Condition
    		Engine is running
    A/C switch: ON


    2. Camry. Acv40 Gsv40.Air Conditioning.Air Conditioning System.Air Conditioning System Terminals Of Ecu

  2. Waveform 2:

    Item
    		Contents
    Terminal No. (Symbols)
    		E38-8 (LOCK) - E38-14 (GND)
    Tool Setting
    		200 mV/DIV., 10 ms./DIV.
    Vehicle Condition
    		Engine is running
    Blower switch: LO
    A/C switch: ON


    3. Camry. Acv40 Gsv40.Air Conditioning.Air Conditioning System.Air Conditioning System Terminals Of Ecu

  3. Waveform 3:

    Item
    		Contents
    Terminal No. (Symbols)
    		E38-23 (BLW) - E38-14 (GND)
    Tool Setting
    		1 V/DIV., 500 μs/DIV.
    Vehicle Condition
    		Ignition switch: ON
    Blower switch: ON

A/C CONTROL ASSEMBLY (HEATER CONTROL BASE SUB-ASSEMBLY)

Camry. Acv40 Gsv40.Air Conditioning.Air Conditioning System.Air Conditioning System Terminals Of Ecu

HINT:
Check from the rear of the connector while it is connected to the A/C control assembly (heater control base sub-assembly).

Terminal No.
(Symbols)
Wiring Color
Terminal Description
Condition
Specified Condition
F16-3 (GND) - Body ground
W-B - Body ground
Ground for A/C control assembly (heater control base sub-assembly)
Always
Below 1 V
F16-4 (TX+) - F16-3 (GND)
L - W-B
LIN communication circuit
Ignition switch: ON
Pulse generation
F16-5 (IG+) - F16-3 (GND)
V - W-B
Power source (IG)
Ignition switch: LOCK
Below 1 V
F16-5 (IG+) - F16-3 (GND)
V - W-B
Power source (IG)
Ignition switch: ON
10 to 14 V