Toyota Venza: Terminals Of Ecu
TERMINALS OF ECU
1. CHECK TIRE PRESSURE WARNING ECU
HINT:
Inspect the connectors from the back side while the connectors are connected.
(a) Disconnect the L14 tire pressure warning antenna and receiver connector.
(b) Measure the voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
D31-12 (RDA) - D31-9 (GND) |
Y - W-B |
Tire pressure warning antenna and receiver signal |
Ignition switch ON |
11 to 14 V |
(c) Connect the L14 tire pressure warning antenna and receiver connector.
(d) Measure the voltage and resistance according to the value(s) in the table below. If the result is not as specified, the ECU may have a malfunction.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
D31-2 (SPD) - D31-9 (GND) |
P - W-B |
Vehicle speed signal |
Vehicle driving |
Pulse generation (see waveform 1) |
|
D31-3 (TC) - D31-9 (GND) |
BR - W-B |
TC terminal |
Terminal TC not connected |
11 to 14 V |
|
D31-4 (TACH) - D31-9 (GND) |
V - W-B |
Engine speed signal |
Engine running |
Pulse generation (see waveform 2) |
|
D31-5 (IND) - D31-9 (GND) |
LG - W-B |
Tire pressure warning light output signal |
|
Below 0.5 V |
|
After ignition switch is turned to ON, tire pressure warning light illuminates for 3 seconds. |
0.9 to 3.2 V |
|||
|
D31-6 (RF5V) - D31-9 (GND) |
R - W-B |
Tire pressure warning antenna and receiver power source |
Ignition switch ON |
11 to 14 V |
|
D31-7 (IG) - D31-9 (GND) |
GR - W-B |
IG power source |
Ignition switch ON |
11 to 14 V |
|
D31-9 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
|
D31-10 (SIL) - D31-9 (GND) |
P - W-B |
Diagnostic communication |
Ignition switch ON |
8 to 14 V |
|
D31-11 (GND2) - D31-9 (GND) |
W - W-B |
Tire pressure warning antenna and receiver ground |
Always |
Below 1 Ω |
|
D31-12 (RDA) - D31-9 (GND) |
Y - W-B |
Tire pressure warning antenna and receiver signal |
Ignition switch ON |
11 to 14 V |
(e) Using an oscilloscope, check waveform 1.
Waveform 1
|
Item |
Content |
|---|---|
|
Terminal |
D31-2 (SPD) - D31-9 (GND) |
|
Tool setting |
5 V/DIV, 20 ms./DIV. |
|
Vehicle condition |
Driving at approximately 20 km/h (12 mph) |
HINT:
The wavelength becomes shorter as the vehicle speed increases.
(f) Using an oscilloscope, check waveform 2.
Waveform 2
|
Item |
Content |
|---|---|
|
Terminal |
D31-4 (TACH) - D31-9 (GND) |
|
Tool setting |
5 V/DIV., 10 ms./DIV. |
|
Vehicle condition |
Idling |
HINT:
The wavelength becomes shorter as the engine speed increases.
Diagnosis System
DIAGNOSIS SYSTEM
1. CHECK BATTERY VOLTAGE
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge the battery before proceeding to the next
step.
2. CHECK DLC3
(a) The ECU uses IS ...
Dtc Check / Clear
DTC CHECK / CLEAR
1. DTC CHECK (USING SST CHECK WIRE)
(a) Turn the ignition switch off.
(b) Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.
SST: 09843-18040
(c) Turn the ignition s ...
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Inspection
INSPECTION
PROCEDURE
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(a) Secure the tie rod assembly LH in a vise.
(b) Install the nut to the stud bolt.
(c) Flip the ball joint back and forth 5 times.
(d) Set a to ...
Engine coolant
The coolant level is satisfactory if it is between the “F” and “L” lines on the
reservoir when the engine is cold.
1. Reservoir cap
2. Full
3. Low
If the level is on or below the “L” line, add coolant up to the “F” line.
- If the ...
Vehicle identification
- Vehicle identification number
The vehicle identification number (VIN) is the legal identifier for your vehicle.
This is the primary identification number for your Toyota. It is used in registering
the ownership of your vehicle.
This number is s ...
0.1172