| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VJHY |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - ] |
| Title: THEFT DETERRENT / KEYLESS ENTRY: THEFT DETERRENT SYSTEM: Unlock Warning Switch Circuit; 2016 - 2020 MY Sienna [12/2015 - ] | ||
|
Unlock Warning Switch Circuit |
DESCRIPTION
The key unlock warning switch assembly turns on when the ignition key is inserted into the ignition key cylinder and turns off when the ignition key is removed.
The main body ECU operates the key confinement prevention function while the key unlock warning switch assembly is on.
WIRING DIAGRAM
PROCEDURE
|
1. |
READ VALUE USING TECHSTREAM (UNLOCK WARNING SWITCH ASSEMBLY) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Select the item below in the Data List and then read the display on the Techstream.
Main Body
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Key Unlock Warning SW |
Unlock warning switch signal/ON or OFF |
ON: Key inserted in the ignition key cylinder OFF: Key removed from the ignition key cylinder |
- |
OK:
When the key is in the ignition key cylinder, ON appears on the Techstream.
| OK |
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (See page
|
![2016 MY Sienna [12/2015 - 08/2016]; THEFT DETERRENT / KEYLESS ENTRY: THEFT DETERRENT SYSTEM: PROBLEM SYMPTOMS TABLE](/t3Portal/stylegraphics/info.gif)
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|
2. |
INSPECT UNLOCK WARNING SWITCH ASSEMBLY |
|
(a) Remove the unlock warning switch assembly (See page
|
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D26-1 (UN+) - D26-2 (UN-) |
Push released (Free) |
10 kΩ or higher |
|
D26-1 (UN+) - D26-2 (UN-) |
Pin pushed in |
Below 1 Ω |
Text in Illustration
|
*1 |
Component without harness connected (Unlock Warning Switch Assembly) |
| NG |
|
|
|
3. |
CHECK HARNESS AND CONNECTOR (UNLOCK WARNING SWITCH - BODY GROUND) |
|
(a) Disconnect the D26 unlock warning switch assembly connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D26-2 - Body ground |
Always |
Below 1 Ω |
Text in Illustration
|
*1 |
Front view of wire harness connector (to Unlock Warning Switch Assembly) |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
CHECK HARNESS AND CONNECTOR (UNLOCK WARNING SWITCH - MAIN BODY ECU) |
(a) Disconnect the D13 main body ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D26-1 - D13-17 (KSW) |
Always |
Below 1 Ω |
| OK |
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (See page
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|