| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VITS |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - ] |
| Title: TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM: Tire Pressure Warning Light Circuit; 2016 - 2020 MY Sienna [12/2015 - ] | ||
|
Tire Pressure Warning Light Circuit |
DESCRIPTION
If the tire pressure warning ECU detects a disconnected connector or an open circuit between the tire pressure warning ECU and combination meter, the tire pressure warning light turns off 10 seconds after the ignition switch is turned ON, blinks for 1 minute, and then remains on. Connecting terminals TC and CG of the DLC3 makes the tire pressure warning light blink and output the DTC.
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 initialization (See page
![2016 - 2020 MY Sienna [12/2015 - ]; TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM: INITIALIZATION](/t3Portal/stylegraphics/info.gif)
) after registration (See page
) of the transmitter IDs into the tire pressure warning ECU after the ECU and/or tire pressure warning valve and transmitter has been replaced.
PROCEDURE
|
1. |
PERFORM ACTIVE TEST USING TECHSTREAM (COMBINATION METER) |
(a) Turn the ignition switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON.
(d) Turn the Techstream on.
(e) Enter the following menus: Body / Combination Meter / Active Test.
(f) Check the condition of the tire pressure warning light by operating the tester.
Combination Meter
|
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Indicat. Tire Pressure Warning System |
Tire Pressure Warning Light illuminates |
ON or OFF |
- |
OK:
The warning light turns on when operating the tester.
| NG |
|
|
|
2. |
CHECK HARNESS AND CONNECTOR (COMBINATION METER - ECU) |
(a) Disconnect the D82 ECU connector.
(b) Disconnect the D18 meter connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D82-5 (IND) - D18-26 (TIRE) |
Always |
Below 1 Ω |
|
D82-5 (IND) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|