Toyota Venza: ECU Power Source Circuit
DESCRIPTION
This is the power source for the tire pressure warning ECU.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- When replacing the tire pressure warning ECU, read the transmitter IDs stored in the old ECU using the Techstream and write them down before removal.
- It is necessary to perform registration (See page
.gif)
) of the transmitter IDs into the tire
pressure warning ECU after the ECU has been replaced.
PROCEDURE
|
1. |
INSPECT FUSE (ECU-IG NO. 2) |
(a) Remove the ECU-IG No. 2 fuse from the driver side junction block.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
ECU-IG No. 2 fuse |
Always |
Below 1 Ω |
| NG | .gif) |
REPLACE FUSE |
|
.gif)
|
2. |
INSPECT IGNITION RELAY NO. 1 |
|
(a) Remove the IG1 relay from the driver side junction block. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
3 - 5 |
Battery voltage is not applied between terminals 1 and 2 |
10 kΩ or higher |
|
Battery voltage is applied between terminals 1 and 2 |
Below 1 Ω |
| NG | |
REPLACE IGNITION RELAY NO. 1 |
|
|
3. |
CHECK HARNESS AND CONNECTOR (ECU - BATTERY AND BODY GROUND) |
|
(a) Disconnect the D31 ECU connector. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D31-7 (IG) - Body ground |
Ignition switch ON |
11 to 14 V |
|
Ignition switch off |
Below 1 V |
|
*1 |
Front view of wire harness connector (to Tire Pressure Warning ECU) |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D31-9 (GND) - Body ground |
Always |
Below 1 Ω |
| OK | |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Transmitter ID1 Operation Stop (C2111/11-C2114/14)
DESCRIPTION
The tire pressure warning valve and transmitter installed in each tire and wheel
assembly measures the tire pressures. The measured values are transmitted as radio
waves to the tire p ...
Tire Pressure Warning Light Circuit
DESCRIPTION
If the tire pressure warning ECU detects a malfunction, the tire pressure warning
light blinks for 1 minute then stays on and tire pressure monitor is canceled at
the same time. At th ...
Other materials about Toyota Venza:
Diagnosis System
DIAGNOSIS SYSTEM
1. CHECK DLC3
(a) Check the DLC3 (See page ).
2. FUNCTION OF P/S WARNING LIGHT
(a) When a malfunction is detected in the power steering system, the P/S warning
light on the accessory meter comes on to inform the driver of the malfunctio ...
Emission inspection and maintenance (I/M) programs
Some states have vehicle emission inspection programs which include OBD (On
Board Diagnostics) checks. The OBD system monitors the operation of the emission
control system.
- If the malfunction indicator lamp comes on
The OBD system determines that ...
Precaution
PRECAUTION
1. PRECAUTION FOR DISCONNECTING THE BATTERY CABLE
NOTICE:
When disconnecting the cable from the negative (-) battery terminal, initialize
the following systems after the cable is reconnected:
System
See Procedure
...
0.1169