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 )
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET
(a) This is a method to specify trouble areas by using a manifold gauge set.
Read the manifold gauge pressure when the following conditions are established.
Test conditions:
Engine has been warmed u ...
Communication Malfunction between ECUs Connected by LIN (B2785)
DESCRIPTION
The certification ECU (smart key ECU assembly) monitors communication between
all the ECUs connected to the certification bus lines. When the certification ECU
(smart key ECU assembly) detects errors in communication with all the ECUs connected
to the certification bus lines at a ...
Steering Angle Sensor Output Malfunction (C1434)
DESCRIPTION
Steering angle sensor (spiral cable with sensor sub-assembly) signals are sent
to the skid control ECU (master cylinder solenoid) via the CAN communication system.
When there is a malfunction in the CAN communication system, it is detected by the
steering angle sensor (spiral cabl ...