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 |
---|---|---|---|---|
F47-6 (RLY1) - F46-4 (GND) |
G - W-B |
Rear differential lock actuator limit switch |
Ignition switch ON Rear differential lock actuator limit switch on |
Below 1.5 V |
Ignition switch ON Rear differential lock actuator limit switch off |
11 to 14 V |
|||
F47-7 (RLY2) - F46-4 (GND) |
P - W-B |
Rear differential lock actuator limit switch |
Ignition switch ON Rear differential lock actuator limit switch on |
Below 1.5 V |
Ignition switch ON Rear differential lock actuator limit switch off |
11 to 14 V |
|||
F47-11 (R) - F46-4 (GND) |
SB - W-B |
Rear differential lock switch |
Ignition switch ON Rear differential lock switch on |
Below 1.5 V |
Ignition switch ON Rear differential lock switch off |
11 to 14 V |
|||
F47-14 (RLP) - F46-4 (GND) |
V - W-B |
Rear differential lock detection switch |
Ignition switch ON Rear differential lock detection switch on |
Below 1.5 V |
Ignition switch ON Rear differential lock detection switch off |
9.5 to 14 V |
|||
F46-8 (M1) - F46-4 (GND) |
LG - W-B |
Differential lock actuator motor |
Ignition switch ON Differential lock switch off → on (Differential lock switch OFF → ON (For 5 seconds after power supplied or until switching of limit switch is complete during FREE to LOCK switching)) |
11 to 14 V |
Ignition switch ON Differential lock switch off → on (Differential lock 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 |
F46-7 (M2) - F46-4 (GND) |
L - W-B |
Differential lock actuator motor |
Ignition switch ON Differential lock switch on → off (Differential lock switch ON → OFF (For 5 seconds after power supplied or until switching of limit switch is complete during LOCK to FREE switching)) |
11 to 14 V |
Ignition switch ON Differential lock switch on → off (Differential lock actuator motor stopped) |
Below 1.5 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) |
(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 1.
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.
Accessories, spare parts and modification of your Toyota
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Reassembly
REASSEMBLY
CAUTION / NOTICE / HINT
CAUTION:
Wear protective gloves. Sharp areas on the parts may injure your hands.
HINT:
A bolt without a torque specification is shown in the standard bolt chart (See
page ).
PROCEDURE
1. INSTALL REAR SEAT TRACK ADJU ...