| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VIW7 |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - 11/2017] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: VSC OFF Switch Circuit; 2016 - 2017 MY Sienna [12/2015 - 11/2017] | ||
|
VSC OFF Switch Circuit |
DESCRIPTION
The skid control ECU (brake actuator assembly) is connected to the combination meter assembly via CAN communication.
Pressing the VSC OFF switch turns off TRAC operation, and pressing and holding this switch turns off TRAC and VSC operation. If TRAC and VSC operations are turned off, the "TRAC OFF"*1 or "Traction Control OFF"*2 message will be displayed on the multi-information display and the VSC OFF indicator light will come on.
- *1: for Multi-information Display (Monochrome Type)
- *2: for Multi-information Display (Color Type)
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
When replacing the skid control ECU (brake actuator assembly), perform zero point calibration and store system information.
PROCEDURE
|
1. |
CHECK CAN COMMUNICATION SYSTEM |
(a) Check if CAN communication system DTCs are output (See page
![2016 MY Sienna [12/2015 - 08/2016]; NETWORKING: CAN COMMUNICATION SYSTEM: DIAGNOSIS SYSTEM](/t3Portal/stylegraphics/info.gif)
).
Result
|
Result |
Proceed to |
|---|---|
|
DTCs are not output. |
A |
|
DTCs are output. |
B |
| B |
|
CHECK CAN COMMUNICATION SYSTEM (See page
|
|
|
2. |
CHECK IF BRAKE ACTUATOR ASSEMBLY CONNECTOR IS SECURELY CONNECTED |
(a) Check if the skid control ECU (brake actuator assembly) connector is securely connected.
OK:
The connector is securely connected.
| NG |
|
CONNECT CONNECTOR TO BRAKE ACTUATOR ASSEMBLY CORRECTLY |
|
|
3. |
READ VALUE USING TECHSTREAM (TRAC/VSC OFF MODE) |
(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 /Data List.
(e) According to the display on the Techstream, read the Data List.
ABS/VSC/TRAC
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
TRAC/VSC Off Mode |
TRAC/VSC off mode / Normal, TRAC OFF, Unknown or VSC OFF |
Normal: Normal mode TRAC OFF: TRAC off mode Unknown: Unspecified VSC OFF: VSC off mode |
- |
(f) Check the indicator light and mode condition on the Techstream changes according to VSC OFF switch operation.
Standard
|
Switch Operation |
Mode Condition Display |
Multi-information Display ("TRAC OFF"*1 or "Traction Control OFF"*2 message) |
VSC OFF Indicator Light |
|---|---|---|---|
|
Not pressed |
Normal |
Not displayed |
Does not come on |
|
Pressing the VSC OFF switch |
TRAC OFF |
Displayed |
Does not come on |
|
Pressing and holding the VSC OFF switch |
VSC OFF |
Displayed |
Comes on |
- *1: for Multi-information Display (Monochrome Type)
- *2: for Multi-information Display (Color Type)
Result
|
Result |
Proceed to |
|---|---|
|
Indicator light and mode condition display do not change |
A |
|
Mode condition display is normal, but indicator light does not change |
B |
|
Indicator light and mode condition display is normal |
C |
| B |
|
| C |
|
USE SIMULATION METHOD TO CHECK (See page
|
|
|
4. |
PERFORM ACTIVE TEST USING (MULTI-INFORMATION DISPLAY (TRAC OFF MESSAGE) AND VSC OFF INDICATOR LIGHT) |
(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 /Data List.
(e) According to the display on the Techstream, read the Data List.
ABS/VSC/TRAC
|
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
TRC(TRAC) OFF Indicator Light |
Multi-information display ("TRAC OFF"*1 or "Traction Control OFF"*2 message) |
Display (message) ON/OFF |
Observe combination meter |
|
VSC OFF Indicator Light |
VSC OFF indicator light |
Indicator light ON/OFF |
Observe combination meter |
(f) Check the multi-information display ("TRAC OFF"*1 or "Traction Control OFF"*2 message) and VSC OFF indicator light in the combination meter assembly turn on or off in accordance with Techstream operation.
OK:
The multi-information display ("TRAC OFF"*1 or "Traction Control OFF"*2 message) and VSC OFF indicator light turn on or off in accordance with Techstream operation.
- *1: for Multi-information Display (Monochrome Type)
- *2: for Multi-information Display (Color Type)
| NG |
|
|
|
5. |
INSPECT VSC OFF SWITCH |
(a) Remove the VSC OFF switch (See page
).
(b) Inspect the VSC OFF switch (See page
).
| NG |
|
|
|
6. |
CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - VSC OFF SWITCH) |
(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 |
|---|---|---|
|
A4-30 (CSW) - D142-6 (+) |
Always |
Below 1 Ω |
|
A4-30 (CSW) or D142-6 (+) - Body ground |
Always |
10 kΩ or higher |
|
D142-3 (E) - Body ground |
Always |
Below 1 Ω |
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 parts (See page
).
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
7. |
INSPECT COMBINATION METER ASSEMBLY |
(a) Turn the ignition switch off.
(b) Perform an Active Test of the combination meter assembly using the Techstream.
(c) Check the combination meter assembly.
OK:
The multi-information display and VSC OFF indicator light turn on or off in accordance with Techstream operation.
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 parts (See page
).
| OK |
|
| NG |
|
|
|