TERMINALS OF ECU
1. AIR CONDITIONING AMPLIFIER ASSEMBLY
HINT:
Check from the rear of the connector while it is connected to the air conditioning amplifier assembly.
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
A14-1 (IG+) - A14-12 (GND) |
P - W-B |
Power source (IG) |
Ignition switch ON |
11 to 14 V |
Ignition switch off |
Below 1 V |
|||
A14-2 (BLRH) - A14-12 (GND) |
SB - W-B |
Blower switch signal |
|
Below 1 V |
|
11 to 14 V |
|||
A14-3 (MC) - A14-12 (GND) |
BE - W-B |
Air mix select switch signal |
|
1 to 14 V |
|
Below 1 V |
|||
A14-4 (LOCK) - A14-12 (GND) |
G - W-B |
A/C lock sensor signal |
|
Pulse generation (See waveform 1) |
A14-5 (PRE) - A14-12 (GND) |
V - W-B |
Air conditioner pressure sensor signal |
|
4.71 V or higher |
|
Below 0.74 V |
|||
|
0.74 to 4.71 V |
|||
A14-6 (TE) - A14-32 (SG-2) |
B - GR |
Evaporator temperature sensor signal |
|
1.7 to 2.1 V |
|
0.9 to 1.3 V |
|||
A14-7 (TAM) - A14-33 (SG-1) |
W - LG |
Ambient temperature sensor signal |
|
1.35 to 1.75 V |
|
0.9 to 1.2 V |
|||
A14-8 (S5-1) - A14-12 (GND) |
SB - W-B |
Power supply for air conditioner pressure sensor |
Ignition switch off |
Below 1 V |
Ignition switch ON |
4.5 to 5.5 V |
|||
A14-9 (ACT) - A14-12 (GND) |
R - W-B |
Compressor operation signal |
|
Below 1 V |
|
4.75 to 5.25 V |
|||
A14-10 (CANH) |
L |
CAN communication system |
- |
- |
A14-11 (CANL) |
W |
CAN communication system |
- |
- |
A14-12 (GND) - Body ground |
W-B - Body ground |
Ground for main power supply |
Always |
Below 1 Ω |
A14-13 (PTC3) - A14-12 (GND)*1 |
P - W-B |
Quick heater operation signal |
|
11 to 14 V |
|
Below 1 V |
|||
A14-14 (PTC2) - A14-12 (GND)*1 |
W - W-B |
Quick heater operation signal |
|
11 to 14 V |
|
Below 1 V |
|||
A14-15 (PTC1) - A14-12 (GND)*1 |
V - W-B |
Quick heater operation signal |
|
11 to 14 V |
|
Below 1 V |
|||
A14-18 (MGC) - A14-12 (GND) |
G - W-B |
Magnetic clutch operation signal |
|
11 to 14 V |
|
Below 1 V |
|||
A14-20 (REC) - A14-12 (GND) |
R - W-B |
Recirculation/Fresh switch signal |
|
11 to 14 V (Servo motor operating) |
A14-21 (B) - A14-12 (GND) |
LG - W-B |
Power source (Back-up) |
Always |
11 to 14 V |
A14-22 (DEF) - A14-12 (GND) |
R - W-B |
Mode switch signal |
|
1 to 14 V |
|
Below 1 V |
|||
A14-26 (MR/F) - A14-12 (GND) |
SB - W-B |
REC switch operation signal |
|
4 to 5 V |
|
Below 1 V |
|||
A14-27 (A/C) - A14-12 (GND) |
GR - W-B |
A/C switch operation signal |
|
4 to 5 V |
|
Below 1 V |
|||
A14-32 (SG-2) - Body ground |
GR - Body ground |
Ground for evaporator temperature sensor |
Always |
Below 1 Ω |
A14-33 (SG-1) - Body ground |
LG - Body ground |
Ground for air conditioner pressure sensor, ambient temperature sensor, A/C lock sensor |
Always |
Below 1 Ω |
A14-35 (ACID) - A14-12 (GND) |
B - W-B |
A/C switch LED signal |
|
11 to 14 V |
|
Below 3 V |
|||
A14-37 (AC1) - A14-12 (GND) |
BE - W-B |
Compressor operation signal |
|
11 to 14 V |
|
Below 1 V |
|||
A14-40 (FRS) - A14-12 (GND) |
V - W-B |
Recirculation/Fresh switch signal |
|
11 to 14 V Servo motor operating) |
(a) Waveform 1:
Item |
Content |
---|---|
Terminal No. |
A14-4 (LOCK) - A14-12 (GND) |
Tool Setting |
200 mV/DIV., 10 ms./DIV. |
Vehicle Condition |
|
2. ECM (2TR-FE) (See page
)
3. ECM (2GR-FKS) (See page
)
All Door Entry Lock/Unlock Functions do not Operate, but Wireless Functions
Operate
DESCRIPTION
When the wireless operation can be used to lock and unlock the doors, communication
between the electrical key and TPMS receiver assembly and certification ECU (smart
key ECU assembly) is normal. If the entry lock and unlock functions do not operate,
the entry cancel function may ...
Screen Flicker or Color Distortion
PROCEDURE
1.
CHECK DISPLAY SETTING
(a) Reset display settings (contrast, brightness) and check that the screen appears
normal.
OK:
The display returns to normal.
OK
END
NG
PROCEED TO NEXT SUSPECTED AREA SHOWN IN ...
System Diagram
SYSTEM DIAGRAM
Communication Table
Sender
Receiver
Signal
Communication Method
Power window regulator master switch assembly*1
Main Body ECU (Multiplex Network Body ECU)
Door control switch signal
...