TERMINALS OF ECU
1. CHECK 4 WHEEL DRIVE CONTROL ECU
Text in Illustration
*a |
Component with harness connected (4 Wheel Drive Control ECU) |
- |
- |
(a) Measure the resistance and voltage according to the value(s) in the table below.
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
F13-12 (SLS) - F12-10 (GND) |
L - W-B |
Differential lock indicator switch |
Ignition switch ON Rear differential FREE |
10 to 14 V |
Ignition switch ON Rear differential LOCK |
Below 1.5 V |
|||
F13-15 (R) - F12-10 (GND) |
R - W-B |
Differential lock switch input |
Ignition switch ON Differential lock switch not pressed |
11 to 14 V |
Ignition switch ON Differential lock switch pressed and held |
Below 1.5 V |
|||
F13-20 (CANH) - F13-40 (CANL) |
BE - W |
HIGH-level CAN bus wire - LOW-level CAN bus wire |
Ignition switch off Cable disconnected from negative (-) battery terminal |
54 to 69 Ω |
F13-21 (+B) - F12-10 (GND) |
W - W-B |
ECU power supply |
Always |
10 to 14 V |
F12-1 (SL+) - F12-10 (GND) |
B - W-B |
Differential lock coil drive output (continuity with IG when operating) |
Ignition switch ON Rear differential free |
Below 1.5 V |
Ignition switch ON Switching between free and locked (Condition: A or C) |
Pulse generation (See waveform 1) |
|||
Ignition switch ON Rear differential locked (Condition B) |
Pulse generation (See waveform 1) |
|||
F12-4 (IG) - F12-10 (GND) |
Y - W-B |
ECU and actuator power supply |
Ignition switch ON |
11 to 14 V |
F12-5 (SL-) - F12-10 (GND) |
W - W-B |
Differential lock coil drive output (continuity with GND when operating) |
Ignition switch ON Rear differential free |
Below 1.5 V |
Ignition switch ON Rear differential switching between free and locked (Condition: A or C) |
Pulse generation (See waveform 2) |
|||
Ignition switch ON Rear differential locked (Condition B) |
Pulse generation (See waveform 2) |
|||
F12-10 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
(b) Waveform 1
(1) Rear differential in locked condition
Item |
Content |
---|---|
Tester Connection |
F12-1 (SL+) - F12-10 (GND) |
Tool Setting |
5 V/DIV., 500 ms./DIV. |
Condition: A |
Ignition switch ON Switching between free and locked |
Condition: B |
Ignition switch ON Rear differential locked |
*a |
Condition: A |
*b |
Condition: B |
(2) Rear differential not in locked condition (switching between free and locked)
Item |
Content |
---|---|
Tester Connection |
F12-1 (SL+) - F12-10 (GND) |
Tool Setting |
.5 V/DIV., 500 ms./DIV. |
Condition: C |
Ignition switch ON Switching between free and locked |
(c) Waveform 2
(1) Rear differential in locked condition
Item |
Content |
---|---|
Tester Connection |
F12-5 (SL-) - F12-10 (GND) |
Tool Setting |
5 V/DIV., 500 ms./DIV. |
Condition: A |
Ignition switch ON Switching between free and locked |
Condition: B |
Ignition switch ON Rear differential locked |
*a |
Condition: A |
*b |
Condition: B |
(2) Rear differential not in locked condition (switching between free and locked)
Item |
Content |
---|---|
Tester Connection |
F12-5 (SL-) - F12-10 (GND) |
Tool Setting |
5 V/DIV., 500 ms./DIV. |
Condition: C |
Ignition switch ON Switching between free and locked |
Cursor or Map Rotates when Vehicle Stopped
PROCEDURE
1.
CHECK CONDITION
(a) Check with the customer if the vehicle has been turned by a turntable.
OK:
Vehicle has not been turned by a turntable.
HINT:
If the vehicle is turned on a turntable with the ignition switch ON,
the system ...
Engine compartment
2.7 L 4-cylinder (2TR-FE) engine
1. Washer fluid tank
2.Radiator cap
3.Engine coolant reservoir
4. Engine oil filler cap
5. Power steering fluid reservoir
6. Engine oil level dipstick
7. Brake fluid reservoir
8. Fuse box
9. Battery
10. Condenser
11. Radiator
4.0 L V6 (1GR-FE) engine
...
Horn System
Parts Location
PARTS LOCATION
ILLUSTRATION
Precaution
PRECAUTION
1. IGNITION SWITCH EXPRESSIONS
(a) The type of ignition switch used on this model differs depending on the specifications
of the vehicle. The expressions listed in the table below are used in this section.
Exp ...