TERMINALS OF ECU
1. CHECK TIRE PRESSURE WARNING ECU
HINT:
Inspect the connector from the back side.
(a) Disconnect the F7 ECU connector.
(b) Measure the voltage according to the value(s) in the table below.
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
F7-7 (IG) - F7-9 (GND) |
G - W-B |
IG power source |
Ignition switch ON |
11 to 14 V |
(c) Connect the F7 ECU connector.
(d) Measure the voltage and resistance according to the value(s) in the table below.
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
F7-2 (SPD) - F7-9 (GND) |
SB - W-B |
Vehicle speed signal |
Vehicle being driven |
Pulse generation (see waveform 1) |
F7-3 (TC) - F7-9 (GND) |
R - W-B |
TC terminal |
Terminal TC not connected |
11 to 14 V |
F7-4 (TACH) - F7-9 (GND) |
P - W-B |
Engine speed signal |
Engine running |
Pulse generation (see waveform 2) |
F7-5 (IND) - F7-9 (GND) |
G - W-B |
Tire pressure warning light output signal |
After ignition switch turned to ON, tire pressure warning light illuminates for 3 seconds |
0.9 to 3.2 V |
Ignition switch ON Tire pressure warning light off |
3.2 V or higher |
|||
F7-6 (RF5V) - F7-9 (GND) |
LG - W-B |
Tire pressure warning antenna and receiver power source |
Ignition switch ON |
4.5 to 5.5 V |
F7-9 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
F7-10 (SIL) - F7-9 (GND) |
G - W-B |
Diagnosis tester communication line |
Ignition switch ON Communication not performed with tester |
11 to 14 V |
F7-11 (GND2) - F7-9 (GND) |
GR - W-B |
Tire pressure warning antenna and receiver ground |
Always |
Below 1 Ω |
F7-12 (RDA) - F7-9 (GND) |
SB - W-B |
Tire pressure warning antenna and receiver signal |
Ignition switch ON |
11 to 14 V |
(e) Using an oscilloscope, check waveform 1.
Item |
Contents |
---|---|
Terminal No. (Symbol) |
F7-2 (SPD) - F7-9 (GND) |
Tool Setting |
5 V/DIV., 200 ms/DIV. |
Vehicle Condition |
Vehicle being driven at approximately 20 km/h (12 mph) |
HINT:
The wavelength becomes shorter as the vehicle speed increases.
(f) Using an oscilloscope, check waveform 2.
Item |
Contents |
---|---|
Terminal No. (Symbol) |
F7-4 (TACH) - F7-9 (GND) |
Tool Setting |
5 V/DIV., 10 ms/DIV. |
Vehicle Condition |
Idling |
HINT:
The wavelength becomes shorter as the engine speed increases.
Removal
REMOVAL
CAUTION / NOTICE / HINT
CAUTION:
Wear protective gloves. Sharp areas on the parts may injure your hands.
PROCEDURE
1. REMOVE REAR SEAT HEADREST ASSEMBLY
(a) Remove the headrest.
2. REMOVE REAR SEAT TRACK INNER BRACKET COVER
(a) Using a mouldi ...
Installation
INSTALLATION
CAUTION / NOTICE / HINT
CAUTION:
Wear protective gloves. Sharp areas on the parts may injure your hands.
HINT:
Use the same procedure for the RH and LH sides.
The procedure listed below is for the LH side.
PROCEDURE
1. INS ...