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 |
PTC Heater Circuit
DESCRIPTION
PTC HTR heater relays are closed in accordance with signals from the air conditioning
amplifier assembly and power is supplied to the quick heater assembly installed
on the radiator heater unit.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits rela ...
Tires
Replace or rotate tires in accordance with maintenance schedules and treadwear.
■ Checking tire
1. New tread
2. Treadwear indicator
3. Worn tread
The location of treadwear indicators is shown by the “TWI” or “
” marks, etc., molded on the sidewall of each tire.
Check spare ti ...
Air Outlet Control Servo Motor
Inspection
INSPECTION
PROCEDURE
1. INSPECT MODE CONTROL SERVO MOTOR
(a) Inspect the servo motor operation.
(1) When 12V is applied between terminals 4 (IGN) and 1 (GND), and 0V
is applied between terminals 2 (SIG) and 1 (GND), check that the line connecting
the 2 notches ...