Toyota 4Runner: Terminals Of Ecu
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.
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 1.
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 lis ...
Inspection
INSPECTION
PROCEDURE
1. INSPECT DIFFERENTIAL LOCK SYSTEM
(a) Inspect the indicator light.
(1) Check that the indicator light lights up approximately 1 second after the
ignition switch is turne ...
Other materials about Toyota 4Runner:
Reassembly
REASSEMBLY
PROCEDURE
1. INSTALL MAGNET CLUTCH ASSEMBLY
(a) Align the parts as shown in the illustration and install the magnet clutch
stator.
(b) Using a snap ring expander, install a new snap ring with the chamfered
side facing up.
...
Short in Telephone Antenna Circuit (B1573,B15CB)
DESCRIPTION
This DTC is stored when the DCM (Telematics Transceiver) detects an open or a
short in the telephone and GPS antenna circuit. The DCM (Telematics Transceiver)
sends and receives signals at a radio frequency of between 824 and 894 MHz or 1850
...
0.025