Toyota Venza: Terminals Of Ecu
TERMINALS OF ECU
1. CLEARANCE WARNING ECU ASSEMBLY
(a) Disconnect the D79 clearance warning ECU assembly connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
D79-9 (CLSW) - D79-30 (E) |
B - W |
Back sonar or clearance sonar switch assembly power source signal |
Engine switch on (IG), clearance sonar main switch on |
11 to 14 V |
|
D79-9 (CLSW) - D79-30 (E) |
B - W |
Back sonar or clearance sonar switch assembly power source signal |
Engine switch on (IG), clearance sonar main switch off |
Below 1 V |
|
D79-1 (IG) - D79-30 (E) |
GR - W |
IG power source signal |
Engine switch off |
Below 1 V |
|
Engine switch on (IG) |
11 to 14 V |
|||
|
D79-30 (E) - Body ground |
W - Body ground |
Ground |
Always |
Below 1 Ω |
(c) Reconnect the D79 clearance warning ECU assembly connector.
(d) Measure the voltage and check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
D79-22 (BOR) - D79-30 (E) |
V - W |
Power source for rear sensor circuit |
Engine switch off |
Below 1 V |
|
Engine switch on (IG), clearance sonar main switch on |
7.2 to 8.8 V |
|||
|
D79-8 (SOF) - D79-30 (E) |
LG - W |
Front sensor communication signal (Front clearance sonar sensor) |
Engine switch on (IG), clearance sonar main switch on, shift lever in R |
Pulse generation (See waveform 2) |
|
D79-13 (ER) - D79-30 (E) |
Y - W |
Clearance warning buzzer signal |
Buzzer sounding |
Pulse generation (See waveform 1) |
|
D79-23 (E1) - D79-30 (E) |
L - W |
Ground for rear clearance sonar |
Always |
Below 1 V |
|
D79-6 (E5) - D79-30 (E) |
BR - W |
Ground for front clearance sonar |
Always |
Below 1 V |
|
D79-4 (BOF) - D79-30 (E) |
W - W |
Power source for front sensor circuit |
Engine switch off |
Below 1 V |
|
Engine switch on (IG), clearance sonar main switch on |
7.2 to 8.8 V |
|||
|
D79-24 (SOR) - D79-30 (E) |
Y - W |
Rear sensor communication signal (Rear clearance sonar sensor) |
Engine switch on (IG), clearance sonar main switch on, shift lever in R |
Pulse generation (See waveform 2) |
(e) Using an oscilloscope, check waveform 1.
(1) Waveform 1 (Reference)
|
Item |
Content |
|---|---|
|
Terminal No. (Symbol) |
D79-13 (ER) - D79-30 (E) |
|
Tool Setting |
2 V/DIV., 500 μsec./DIV. |
|
Vehicle Condition |
When sonar detects obstacle (buzzer sounds) |
|
Buzzer volume |
Buzzer sounding |
HINT:
The amplitude of the waveform changes according to the set volume.
(f) Using an oscilloscope, check waveform 2.
(1) Waveform 2 (Reference)
|
Item |
Content |
|---|---|
|
Terminal No. (Symbol) |
|
|
Tool Setting |
5 V/DIV., 1 msec./DIV. |
|
Condition |
Engine switch on (IG), clearance sonar main switch on, shift lever in R |
HINT:
The waveforms for CH1 and CH2 are same.
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 ...
Diagnosis System
DIAGNOSIS SYSTEM
1. DESCRIPTION
(a) When troubleshooting a vehicle with a diagnosis system, the only difference
from the usual troubleshooting procedure is connecting the Techstream to the vehicle ...
Other materials about Toyota Venza:
If you have a flat tire
Remove the flat tire and replace it with the spare provided. - Before
jacking up the vehicle
• Stop the vehicle on a hard, flat surface.
• Set the parking brake.
• Shift the shift lever to “P”.
• Stop the engine.
• Turn on the emergency f ...
Inspection
INSPECTION
PROCEDURE
1. INSPECT CYLINDER HEAD SUB-ASSEMBLY
(a) Using a precision straightedge and feeler gauge, measure the warpage of the
contact surfaces where the cylinder head contacts the cylinder block and manifold.
Maximum Warpage:
...
Satellite Radio Broadcast cannot be Received
CAUTION / NOTICE / HINT
NOTICE:
Some satellite radio broadcasts require payment. A contract must be made between
a satellite radio company and the user. If the contract expires, it will not be
possible to listen to the broadcast.
PROCEDURE
1 ...
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