| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM1000000010208 |
| Model Year Start: 2017 | Model: Sienna | Prod Date Range: [08/2016 - 11/2017] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: Skid Control Buzzer Circuit; 2017 MY Sienna [08/2016 - 11/2017] | ||
|
Skid Control Buzzer Circuit |
DESCRIPTION
A buzzer sounds to alert the driver when the vehicle-to-vehicle distance becomes less than the set value (w/ dynamic radar cruise control system).
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
When replacing the brake actuator assembly, perform zero point calibration and store system information (See page
![2016 - 2017 MY Sienna [12/2015 - 11/2017]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: CALIBRATION](/t3Portal/stylegraphics/info.gif)
).
- Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
|
1. |
PERFORM ACTIVE TEST USING TECHSTREAM (BUZZER) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Chassis / ABS/VSC/TRAC / Active Test.
(e) According to the display on the Techstream, perform the Active Test.
ABS/VSC/TRAC
|
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
DSS Signal Buzzer |
Skid control buzzer |
Buzzer ON/OFF |
Buzzer can be heard |
(f) Check that the buzzer sounds/stops when turning the skid control buzzer on/off by using the Techstream.
Result
|
Result |
Proceed to |
|---|---|
|
Buzzer does not sound or sounds constantly |
A |
|
Buzzer sounds/stops |
B |
HINT:
If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step (See page ).
Click here
| B |
|
END |
|
|
2. |
CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL) |
|
(a) Turn the ignition switch off. |
|
(b) Disconnect the skid control buzzer connector.
(c) Turn the ignition switch to ON.
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
A21-2 - Body ground |
Ignition switch ON |
11 to 14 V |
Text in Illustration
|
*a |
Front view of wire harness connector (to Skid Control Buzzer) |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |
|
|
3. |
INSPECT SKID CONTROL BUZZER ASSEMBLY |
|
(a) Turn the ignition switch off. |
|
(b) Apply battery negative voltage to terminal 1, and battery positive voltage to terminal 2 of the skid control buzzer, and then check that the buzzer sounds.
OK:
The skid control buzzer sounds.
Text in Illustration
|
*a |
Component without harness connected (Skid Control Buzzer) |
| NG |
|
|
|
4. |
CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - SKID CONTROL BUZZER ASSEMBLY) |
(a) Disconnect the A4 skid control ECU (brake actuator assembly) connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A4-21 (BZ) - A21-1 |
Always |
Below 1 Ω |
|
A4-21 (BZ) or A21-1 - Body ground |
Always |
10 kΩ or higher |
HINT:
If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part (See page
).
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|