TERMINALS OF ECU
1. A/C AMPLIFIER
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 |
---|---|---|---|---|
D47-1 (IG+) - D47-14 (GND) |
Y - W |
Power source (IG) |
Ignition switch ON |
11 to 14 V |
D47-1 (IG+) - D47-14 (GND) |
Y - W |
Power source (IG) |
Ignition switch off |
Below 1 V |
D47-2 (SOL+) - D47-14 (GND) |
L - W |
A/C compressor solenoid operation signal |
Engine running A/C switch: on Blower switch: LO |
Pulse generation (See waveform 1) |
D47-5 (TAM) - D47-13 (GND) |
V - L |
Ambient temperature sensor signal |
Ignition switch ON Ambient temperature: 25°C (77°F) |
1.35 to 1.75 V |
D47-5 (TAM) - D47-13 (GND) |
V - L |
Ambient temperature sensor signal |
Ignition switch ON Ambient temperature: 40°C (104°F) |
0.9 to 1.2 V |
D47-8 (LOCK) - D47-13 (GND)*1 |
P - L |
A/C compressor lock sensor signal |
Engine running Blower switch: LO A/C switch: on |
Pulse generation (See waveform 2) |
D47-9 (PRE) - D47-13 (GND) |
R - L |
A/C pressure sensor signal |
Start engine, Operate A/C system, Refrigerant pressure: Abnormal pressure (more than 3140 kPa (32.0 kgf/cm2, 455 psi)) |
4.84 V or higher |
D47-9 (PRE) - D47-13 (GND) |
R - 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 0.73 V |
D47-9 (PRE) - D47-13 (GND) |
R - L |
A/C pressure sensor signal |
Start engine, Operate A/C system, 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)) |
0.73 to 4.84 V |
D47-10 (S5-3) - D47-13 (GND) |
P - L |
Power supply for A/C pressure sensor |
Ignition switch ON A/C switch: on |
4.75 to 5.25 V |
D47-10 (S5-3) - D47-13 (GND) |
P - L |
Power supply for A/C pressure sensor |
Ignition switch ON A/C switch: off |
Below 1 V |
D47-11 (CANH) - D47-12 (CANL) |
P - W |
CAN communication system |
CAN communication circuit |
Pulse generation |
D47-13 (GND) - Body ground |
L - Body ground |
Ground for A/C pressure sensor, A/C ambient temperature sensor, A/C lock sensor |
Always |
Below 1 V |
D47-14 (GND) - Body ground |
W - Body ground |
Ground for main power supply |
Always |
Below 1 V |
D47-18 (D) - D47-14 (GND) |
G - W |
DEF relay signal |
Ignition switch ON REAR DEF switch: on |
Below 1 V |
D47-18 (D) - D47-14 (GND) |
G - W |
DEF relay signal |
Ignition switch ON REAR DEF switch: off |
11 to 14 V |
D47-20 (MGC) - D47-14 (GND)*1 |
Y - W |
A/C compressor magnetic clutch operation signal |
Ignition switch ON Blower switch: LO A/C switch: off |
11 to 14 V |
D47-20 (MGC) - D47-14 (GND)*1 |
Y - W |
A/C compressor magnetic clutch operation signal |
Ignition switch ON Blower switch: LO A/C switch: on |
Below 1 V |
D47-21 (B) - D47-14 (GND) |
V - W |
Power source (Back-up) |
Always |
11 to 14 V |
D47-23 (BLW) - D47-14 (GND) |
R - W |
Blower motor speed control signal |
Ignition switch ON Blower switch: LO |
Pulse generation (See waveform 3) |
D47-29 (TR) - D47-34 (SG-1) |
LG - V |
Room temperature sensor signal |
Ignition switch ON Cabin temperature: 25°C (77°F) |
1.8 to 2.2 V |
D47-29 (TR) - D47-34 (SG-1) |
LG - V |
Room temperature sensor signal |
Ignition switch ON Cabin temperature: 40°C (104°F) |
1.2 to 1.6 V |
D47-32 (TSP) - D47-14 (GND) |
LG - W |
Solar sensor signal (for Front passenger side) |
Ignition switch ON Solar sensor subjected to electric light |
0.8 to 4.3 V |
D47-32 (TSP) - D47-14 (GND) |
LG - W |
Solar sensor signal (for Front passenger side) |
Ignition switch ON Solar sensor covered with a cloth |
Below 0.8 V |
D47-33 (TSD) - D47-14 (GND) |
P - W |
Solar sensor signal (for Driver side) |
Ignition switch ON Solar sensor subjected to electric light |
0.8 to 4.3 V |
D47-33 (TSD) - D47-14 (GND) |
P - W |
Solar sensor signal (for Driver side) |
Ignition switch ON Solar sensor covered with a cloth |
Below 0.8 V |
D47-34 (SG-1) - Body ground |
V - Body ground |
Ground for room temperature sensor |
Always |
Below 1 V |
D47-37 (LIN1) - D47-14 (GND) |
SB - W |
LIN communication signal |
Ignition switch ON |
Pulse generation |
z7-2 (BUS G) - Body ground |
- |
Ground for BUS IC |
Always |
Below 1 V |
z7-3 (BUS) - z7-2 (BUS G) |
- |
BUS IC control signal |
Ignition switch ON |
Pulse generation |
z7-4 (B BUS) - z7-2 (BUS G) |
- |
Power supply for BUS IC |
Ignition switch off |
Below 1 V |
z7-4 (B BUS) - z7-2 (BUS G) |
- |
Power supply for BUS IC |
Ignition switch ON |
11 to 14 V |
z7-5 (SGA) - Body ground |
- |
Ground for evaporator temperature sensor |
Always |
Below 1 V |
z7-6 (TEA) - z7-5 (SGA) |
- |
A/C evaporator temperature sensor signal |
Ignition switch ON Evaporator temperature: 0°C (32°F) |
1.7 to 2.1 V |
z7-6 (TEA) - z7-5 (SGA) |
- |
A/C evaporator temperature sensor signal |
Ignition switch ON Evaporator temperature: 15°C (59°F) |
0.9 to 1.3 V |
(a) Waveform 1:
Item |
Content |
---|---|
Terminal No. |
D47-2 (SOL+) - D47-14 (GND) |
Tool Setting |
5 V/DIV., 500 μs/DIV. |
Vehicle Condition |
Engine running A/C switch: on |
(b) Waveform 2:
Item |
Content |
---|---|
Terminal No. |
D47-8 (LOCK) - D47-13 (GND) |
Tool Setting |
200 mV/DIV., 10 ms./DIV. |
Vehicle Condition |
Engine running Blower switch: LO A/C switch: on |
(c) Waveform 3:
Item |
Content |
---|---|
Terminal No. |
D47-23 (BLW) - D47-14 (GND) |
Tool Setting |
1 V/DIV., 500 μs/DIV. |
Vehicle Condition |
Ignition switch ON Blower switch: LO |
2. AIR CONDITIONING CONTROL ASSEMBLY
HINT:
Check from the rear of the connector while it is connected to the air conditioning control assembly.
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
E3-1 (ILL-) - E3-3 (ILL+) |
L - BR |
Light control switch signal |
Light control switch: OFF |
Below 1 V |
E3-1 (ILL-) - E3-3 (ILL+) |
L - BR |
Light control switch signal |
Light control switch: TAIL |
11 to 14 V |
E3-2 (LIN1) - E3-5 (GND) |
SB - W |
LIN communication signal |
Ignition switch ON |
Pulse generation |
E3-4 (IG+) - E3-5 (GND) |
GR - W |
Power source (IG) |
Ignition switch off |
Below 1 V |
E3-4 (IG+) - E3-5 (GND) |
GR - W |
Power source (IG) |
Ignition switch ON |
11 to 14 V |
E3-5 (GND) - Body ground |
W - Body ground |
Ground for front air conditioning control assembly |
Always |
Below 1 V |
Precaution
PRECAUTION
1. PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL
NOTICE:
When disconnecting the cable from the negative (-) battery terminal, initialize
the following system after the terminal is reconnected:
System Name
...
Removal
REMOVAL
PROCEDURE
1. PRECAUTION
CAUTION:
Be sure to read Precaution thoroughly before servicing (See page
).
2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-)
bat ...
Data List / Active Test
DATA LIST / ACTIVE TEST
1. DATA LIST
HINT:
Using the Techstream to read the Data List allows the values or states of switches,
sensors, actuator and other items to be read without removing any parts. This non-intrusive
inspection can be very useful beca ...