TERMINALS OF ECU
1. CHECK 4WD CONTROL ECU
(a) Measure the voltage and resistance according to the value(s) in the table below.
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
F47-2 (4WDL) - F46-4 (GND) |
L - W-B |
Transfer indicator switch (L4 position) |
Ignition switch ON Transfer shift lever position H2 or H4 |
10.5 to 14 V |
Ignition switch ON Transfer shift lever position L4 or N |
Below 1.5 V |
|||
F47-3 (4WD) - F46-4 (GND) |
B - W-B |
Transfer indicator switch (4WD position) |
Ignition switch ON Transfer shift lever position H2 |
10.5 to 14 V |
Ignition switch ON Transfer shift lever position H4, L4 or N |
Below 1.5 V |
|||
F47-9 (DL1) - F46-4 (GND) |
LG - W-B |
A.D.D. actuator limit switch |
Ignition switch ON Transfer shift lever position H2 |
Below 1.5 V |
Ignition switch ON Transfer shift lever position H4, L4 or N |
10.5 to 14 V |
|||
F47-10 (DL2) - F46-4 (GND) |
GR - W-B |
A.D.D. actuator limit switch |
Ignition switch ON Transfer shift lever position H2 |
10.5 to 14 V |
Ignition switch ON Transfer shift lever position H4, L4 or N |
Below 1.5 V |
|||
F47-15 (ADD) - F46-4 (GND) |
W - W-B |
A.D.D. detection switch |
Ignition switch ON Transfer shift lever position H2 |
9.5 to 14 V |
Ignition switch ON Transfer shift lever position H4, L4 or N |
Below 1.5 V |
|||
F47-16 (NP) - F46-4 (GND) |
R - W-B |
Transfer indicator switch (Neutral position) |
Ignition switch ON Transfer shift lever position N |
Below 1.5 V |
Ignition switch ON Transfer shift lever position not N |
10.5 to 14 V |
|||
F47-19 (CANH) - F46-4 (GND) |
G - W-B |
CAN communication line |
Ignition switch ON |
Pulse generation (See waveform 1) |
F47-20 (CANL) - F46-4 (GND) |
W - W-B |
CAN communication line |
Ignition switch ON |
Pulse generation (See waveform 2) |
F47-21 (L4) - F46-4 (GND) |
R - W-B |
Transfer L4 signal |
Ignition switch ON Transfer shift lever position H2 or H4 |
10 to 14 V |
Ignition switch ON Transfer shift lever position L4 or N |
Below 1.5 V |
|||
F46-1 (DM1) - F46-4 (GND) |
B - W-B |
A.D.D. actuator motor |
Ignition switch ON Transfer shift lever position H2 → H4, L4 or N (During operation of A.D.D. actuator motor from FREE to LOCK) |
10 to 14 V |
Ignition switch ON Transfer shift lever position H2 → H4, L4 or N (A.D.D. actuator motor stopped) |
Below 1.5 V |
|||
F46-3 (IG) - F46-4 (GND) |
R - W-B |
IG power |
Ignition switch ON |
11 to 14 V |
F46-4 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
F46-5 (DM2) - F46-4 (GND) |
Y - W-B |
A.D.D. actuator motor |
Ignition switch ON Transfer shift lever position H4, L4 or N → H2 (During operation of A.D.D. actuator motor from LOCK to FREE) |
10 to 14 V |
Ignition switch ON Transfer shift lever position H4, L4 or N → H2 (A.D.D. actuator motor stopped) |
Below 1.5 V |
(b) Using an oscilloscope, check waveform 1.
Item |
Content |
---|---|
Terminal No. (Symbols) |
F47-19 (CANH) - F46-4 (GND) |
Tool setting |
1 V/DIV., 10 μsec./DIV. |
Condition |
Engine stopped and ignition switch ON |
*1 |
Waveform 1 |
HINT:
The waveform varies depending on the CAN communication signal.
(c) Using an oscilloscope, check waveform 2.
Item |
Content |
---|---|
Terminal No. (Symbols) |
F47-20 (CANL) - F46-4 (GND) |
Tool setting |
1 V/DIV., 10 μsec./DIV. |
Condition |
Engine stopped and ignition switch ON |
*1 |
Waveform 2 |
HINT:
The waveform varies depending on the CAN communication signal.
Compressor Lock Sensor Circuit (B1422)
SYSTEM DESCRIPTION
The ECM sends the engine speed signal to the air conditioning amplifier assembly
via CAN communication.
The air conditioning amplifier assembly reads the difference between compressor
speed and engine speed. When the difference becomes ...
Installation
INSTALLATION
PROCEDURE
1. INSTALL COOLER DRYER
(a) Using pliers, install the cooler dryer.
(b) Apply a sufficient amount of compressor oil to the contact surfaces
of a new O-ring and the cap.
Compressor oil:
ND-OIL 8 or equivalent
...