| Last Modified: 08-21-2023 | 6.11:8.1.0 | Doc ID: RM100000001AZ9J |
| Model Year Start: 2019 | Model: Avalon | Prod Date Range: [04/2018 - 08/2021] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model): VSC OFF Switch Circuit; 2019 - 2021 MY Avalon [04/2018 - 08/2021] | ||
|
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, "Traction Control Turned Off" will be displayed on the multi-information display and the VSC OFF indicator light will come on.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
When replacing the skid control ECU (brake actuator assembly), perform system variant learning and acceleration sensor zero point calibration.
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![2019 - 2021 MY Avalon [04/2018 - 08/2021]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model): CALIBRATION](/t3Portal/stylegraphics/info.gif)
PROCEDURE
|
1. |
CHECK CAN COMMUNICATION SYSTEM |
(a) Check if CAN communication system DTCs are output.
Click here
|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
DTCs are output |
B |
| B |
|
|
|
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) Enter the following menus: Chassis / ABS/VSC/TRAC/EPB / Data List.
Chassis > ABS/VSC/TRAC/EPB > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
TRAC/VSC Off Mode |
TRAC/VSC off mode |
Normal, TRAC OFF, VSC Expert Mode or VSC OFF |
Normal: Normal mode TRAC OFF: TRAC off mode VSC Expert Mode: VSC expert mode VSC OFF: VSC off mode |
- |
Chassis > ABS/VSC/TRAC/EPB > Data List
|
Tester Display |
|---|
|
TRAC/VSC Off Mode |
(b) 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 ("Traction Control Turned Off") |
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 |
|
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 are normal |
C |
| B |
|
| C |
|
|
|
4. |
PERFORM ACTIVE TEST USING TECHSTREAM (MULTI-INFORMATION DISPLAY (TRACTION CONTROL TURNED OFF) AND VSC OFF INDICATOR LIGHT) |
(a) Enter the following menus: Chassis / ABS/VSC/TRAC/EPB / Active Test.
Chassis > ABS/VSC/TRAC/EPB > Active Test
|
Tester Display |
Measurement Item |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
TRC(TRAC) OFF Indicator Light |
Multi-information display (Traction Control Turned Off) |
Display OFF/ON |
Observe combination meter assembly |
|
VSC OFF Indicator Light |
VSC OFF indicator light |
Indicator light OFF/ON |
Observe combination meter assembly |
Chassis > ABS/VSC/TRAC/EPB > Active Test
|
Tester Display |
|---|
|
TRC(TRAC) OFF Indicator Light |
Chassis > ABS/VSC/TRAC/EPB > Active Test
|
Tester Display |
|---|
|
VSC OFF Indicator Light |
(b) Check that "Traction Control Turned Off" on the multi-information display and the VSC OFF indicator light on the combination meter assembly turn on or off in accordance with the operation of the Techstream.
OK:
"Traction Control Turned Off" on the multi-information display and the VSC OFF indicator light turn on or off in accordance with the operation of the Techstream.
| NG |
|
|
|
5. |
INSPECT VSC OFF SWITCH |
(a) Turn the engine switch off.
|
(b) Make sure that there is no looseness at the locking part and the connecting part of the connector. OK: The connector is securely connected. |
|
(c) Disconnect the G26 VSC OFF switch connector.
(d) Check both the connector case and the terminal for deformation and corrosion.
OK:
No deformation or corrosion.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
5 (+) - 2 (E) |
Switch pushed |
Below 1 Ω |
|
5 (+) - 2 (E) |
Switch not pushed |
10 kΩ or higher |
| NG |
|
|
|
6. |
CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - VSC OFF SWITCH) |
(a) Make sure that there is no looseness at the locking part and the connecting part of the connector.
OK:
The connector is securely connected.
(b) Disconnect the A28 skid control ECU (brake actuator assembly) connector.
(c) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A28-6 (CSW) - G26-5 (+) |
Always |
Below 1 Ω |
|
A28-6 (CSW) or G26-5 (+) - Body ground |
Always |
10 kΩ or higher |
|
G26-2 (E) - Body ground |
Always |
Below 1 Ω |
| OK |
|
REPLACE BRAKE ACTUATOR ASSEMBLY
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
7. |
INSPECT COMBINATION METER ASSEMBLY |
(a) Enter the following menus: Body Electrical / Combination Meter / Active Test.
(b) Perform the Active Test of the combination meter assembly using the Techstream.
Body Electrical > Combination Meter > Active Test
|
Tester Display |
|---|
|
Multi Display All (White) |
Body Electrical > Combination Meter > Active Test
|
Tester Display |
|---|
|
VSC OFF Indicator |
(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.
| OK |
|
REPLACE BRAKE ACTUATOR ASSEMBLY
|
| NG |
|
|
|