Last Modified: 04-05-2023 |
6.11:8.1.0 |
Doc ID: RM100000000VIV3 |
Model Year Start: 2016 |
Model: Sienna |
Prod Date Range: [12/2015 - 08/2016] |
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: Skid Control Buzzer Circuit; 2016 MY Sienna [12/2015 - 08/2016] |
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
).
-
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
1.
|
PERFORM ACTIVE TEST USING TECHSTREAM (BUZZER)
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(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
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Control Range
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Diagnostic Note
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Buzzer
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Skid control buzzer
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Buzzer ON/OFF
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Buzzer can be heard
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(f) Check that the buzzer sounds/stops when turning the skid control buzzer on/off by using the Techstream.
Result
Result
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Proceed to
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Buzzer does not sound or sounds constantly
|
A
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Buzzer sounds/stops
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B
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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
).
B |
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END
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A
|
|
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2.
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CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)
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(a) Turn the ignition switch off.
|
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(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
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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 |
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REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)
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OK
|
|
|
3.
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INSPECT SKID CONTROL BUZZER ASSEMBLY
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(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)
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OK
|
|
|
4.
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CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - SKID CONTROL BUZZER ASSEMBLY)
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(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
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Specified Condition
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A4-21 (BZ) - A51-1
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Always
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Below 1 Ω
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A4-21 (BZ) or A51-1 - Body ground
|
Always
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10 kΩ or higher
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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
).
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
|