| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM10000000260SP |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [09/2022 - ] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model without Electric Parking Brake System TMC Made): VSC OFF Switch Circuit; 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [09/2022 - ] | ||
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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 (combination switch assembly) 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 indicator light and the VSC OFF indicator light will come on.
WIRING DIAGRAM
PROCEDURE
|
1. |
READ VALUE USING GTS (TRAC/VSC OFF MODE) |
(a) Check that the indicator light and mode condition on the GTS change according to VSC OFF switch (combination switch assembly) operation.
Chassis > Brake/EPB > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
TRC(TRAC)/VSC OFF Mode |
TRAC/VSC off mode |
Normal mode (TRC(TRAC) ON/VSC ON) / TRC(TRAC) OFF mode (TRC(TRAC) OFF/VSC ON) / VSC expert mode (VSC expert mode MID ON) / VSC OFF mode (TRC(TRAC) OFF/VSC OFF) |
Normal mode (TRC(TRAC) ON/VSC ON): Normal mode TRC(TRAC) OFF mode (TRC(TRAC) OFF/VSC ON): TRAC off mode VSC expert mode (VSC expert mode MID ON): VSC expert mode VSC OFF mode (TRC(TRAC) OFF/VSC OFF): VSC off mode |
- |
Chassis > Brake/EPB > Data List
|
Tester Display |
|---|
|
TRC(TRAC)/VSC OFF Mode |
Standard:
|
Switch Operation |
Mode Condition Display |
TRAC OFF Indicator Light |
VSC OFF Indicator Light |
|---|---|---|---|
|
Not pressed |
Normal mode (TRC(TRAC) ON/VSC ON) |
Does not come on |
Does not come on |
|
Pressing the VSC OFF switch (combination switch assembly) |
TRC(TRAC) OFF mode (TRC(TRAC) OFF/VSC ON) |
Comes on |
Does not come on |
|
Pressing and holding the VSC OFF switch (combination switch assembly) |
VSC OFF mode (TRC(TRAC) OFF/VSC OFF) |
Comes on |
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 |
|
INSPECT METER / GAUGE SYSTEM
|
| C |
|
|
|
2. |
INSPECT COMBINATION SWITCH ASSEMBLY |
(a) Turn the ignition switch off.
(b) Inspect the VSC OFF switch (combination switch assembly).
Click here
![2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VSC OFF SWITCH: INSPECTION](/t3Portal/stylegraphics/info.gif)
OK:
The VSC OFF switch (combination switch assembly) is normal.
| NG |
|
REPLACE COMBINATION SWITCH ASSEMBLY
|
|
|
3. |
CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - COMBINATION SWITCH ASSEMBLY) |
(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.
OK:
The connector is securely connected.
(b) Disconnect the A140 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 |
|---|---|---|
|
A140-9 (CSW) - I177-8 (+) |
Always |
Below 1 Ω |
|
A140-9 (CSW) or I177-8 (+) - Body ground |
Always |
10 kΩ or higher |
|
I177-5 (E) - Body ground |
1 minute or more after disconnecting the cable from the negative (-) battery terminal |
Below 1 Ω |
| OK |
|
REPLACE BRAKE ACTUATOR ASSEMBLY
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
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