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.
Waveform 1 (Reference)
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.
Waveform 2 (Reference)
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.
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" ...
Transmitter Battery(w/ Smart Key System)
Replacement
REPLACEMENT
CAUTION / NOTICE / HINT
NOTICE:
Take extra care when handling these precision electronic components.
PROCEDURE
1. REMOVE TRANSMITTER BATTERY
(a) Push the release hook knob and extract the emergency key.
...