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
)
Inspection
INSPECTION
PROCEDURE
1. INSPECT OIL PUMP RELIEF VALVE
(a) Coat the oil pump relief valve with engine oil and check that it
falls smoothly into the valve hole by its own weight.
If the valve does not fall smoothly, replace the timing chain cover assembly.
...
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of problem symptoms.
If multiple suspected areas are listed, the potential causes of the symptoms
are listed in order of probability in the "Suspected Area" column of the
table. Check each sy ...
Disassembly
DISASSEMBLY
PROCEDURE
1. INSPECT PROPELLER SHAFT UNIVERSAL JOINT SPIDER BEARING
(a) Check the spider bearings for wear and damage.
(b) Check each spider bearings axial play by turning the yoke while holding the
shaft tightly.
Maximum bearing axial play:
0 to 0.05 mm (0 to 0.00197 in.)
If t ...