| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VJGP |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - ] |
| Title: DOOR LOCK: KEY REMINDER WARNING SYSTEM: Key Reminder Buzzer does not Sound; 2016 - 2020 MY Sienna [12/2015 - ] | ||
|
Key Reminder Buzzer does not Sound |
DESCRIPTION
The key reminder warning buzzer sounds when the driver side door is opened while the ignition switch is in the LOCK or ACC positions. The key reminder warning buzzer is activated when the main body ECU sends a key switch signal and driver side courtesy light switch signal to the combination meter.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
HINT:
Since the key reminder warning system has functions that use CAN communication, first confirm that there is no malfunction in the communication system by inspecting the CAN communication functions in accordance with How to Proceed with Troubleshooting. Then conduct the following troubleshooting procedure.
PROCEDURE
|
1. |
CHECK FRONT DOOR COURTESY LIGHT SWITCH LH |
(a) Open the driver door and check that the open door indicator on the combination meter comes on.
OK:
Open door indicator comes on.
| NG |
|
|
|
2. |
READ VALUE USING TECHSTREAM (KEY UNLOCK WARNING SW) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body / Data List/
(e) Read the Data List according to 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 is in ignition key cylinder OFF: No key is in ignition key cylinder |
- |
OK:
When the unlock warning switch is operated, the display changes as shown in the table.
| NG |
|
|
|
3. |
CHECK COMBINATION METER ASSEMBLY (BUZZER OPERATION) |
(a) Remove the key from the key cylinder, turn the light control switch on the headlight dimmer switch assembly to the tail position, and open the driver door.
OK:
The light reminder warning buzzer sounds.
HINT:
The key reminder warning system sounds the buzzer built in to the combination meter for key reminder warnings. This buzzer is also used for the light reminder warning system. Therefore, check the operation of the combination meter buzzer by checking if the buzzer sounds to inform that the lights are still on.
| OK |
|
| NG |
|
|
4. |
INSPECT UNLOCK WARNING SWITCH ASSEMBLY |
(a) Remove the unlock warning switch assembly (See page
![2016 - 2020 MY Sienna [12/2015 - ]; DOOR LOCK: UNLOCK WARNING SWITCH: REMOVAL](/t3Portal/stylegraphics/info.gif)
).
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
1 - 2 |
Switch free |
10 kΩ or higher |
|
1 - 2 |
Switch pushed |
Below 1 Ω |
Text in Illustration
|
*a |
Component without harness connected (Unlock Warning Switch) |
| NG |
|
|
|
5. |
CHECK HARNESS AND CONNECTOR (UNLOCK WARNING SWITCH - MAIN BODY ECU) |
(a) Disconnect the D26 unlock warning switch connector.
(b) Disconnect the D13 main body ECU connector.
(c) 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 |
|
D26-1 - Body ground |
Always |
10 kΩ or higher |
|
D26-2 - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPLACE HARNESS OR CONNECTOR |
|
|
6. |
REPLACE MAIN BODY ECU |
(a) Temporarily replace the main body ECU with a new or normally functioning one (See page
).
|
|
7. |
READ VALUE USING TECHSTREAM (KEY UNLOCK WARNING SW) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body / Data List/
(e) Read the Data List according to 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 is in ignition key cylinder OFF: No key is in ignition key cylinder |
- |
OK:
When the unlock warning switch is operated, the display changes as shown in the table.
| OK |
|
END (MAIN BODY ECU IS DEFECTIVE) |
| NG |
|
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY |
|
|