Toyota Corolla Cross: 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, "Traction Control Turned Off" will be displayed on the multi-information display and the VSC OFF indicator light will come on.
WIRING DIAGRAM
PROCEDURE
|
1. |
READ VALUE USING GTS (TRAC/VSC OFF MODE) |
(a) Check the Data List using the GTS.
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 |
- |
|
Tester Display |
|---|
|
TRC(TRAC)/VSC OFF Mode |
(b) Check the indicator light and mode condition on the GTS changes according to VSC OFF switch (combination switch assembly) operation.
Standard:
|
Switch Operation |
Mode Condition Display |
Multi-information Display ("Traction Control Turned Off") |
VSC OFF Indicator Light |
|---|---|---|---|
|
Not pressed |
Normal mode (TRC(TRAC) ON/VSC ON) |
Not displayed |
Does not come on |
|
Pressing the VSC OFF switch (combination switch assembly) |
TRC(TRAC) OFF mode (TRC(TRAC) OFF/VSC ON) |
Displayed |
Does not come on |
|
Pressing and holding the VSC OFF switch (combination switch assembly) |
VSC OFF mode (TRC(TRAC) OFF/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 | .gif)
|
INSPECT METER / GAUGE SYSTEM |
| C |
|
USE SIMULATION METHOD TO CHECK |
|
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|
2. |
INSPECT COMBINATION SWITCH ASSEMBLY |
Click here .gif)
OK:
The VSC OFF switch 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 connector.
OK:
The connector is securely connected.
(b) Disconnect the A151 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the I61 VSC OFF switch (combination switch assembly) connector.
(d) Check both the connector case and the terminals 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 |
|---|---|---|
|
I61-7 (+) - A151-38 (CSW) |
Always |
Below 1 Ω |
|
I61-7 (+) or A151-38 (CSW) - Body ground |
Always |
10 kΩ or higher |
|
I61-5 (E) - Body ground |
1 minute or more after disconnecting the cable from the negative (-) auxiliary battery terminal |
Below 1 Ω |
| OK |
|
REPLACE BRAKE ACTUATOR ASSEMBLY |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
READ NEXT:
Precaution
PRECAUTION
PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE AUXILIARY BATTERY
TERMINAL
NOTICE:
After the ignition switch is turned off, there may be a waiting
time before disconnecting the nega
Parts Location
PARTS LOCATION
ILLUSTRATION
*1
FRONT SPEED SENSOR RH
*2
FRONT AXLE HUB SUB-ASSEMBLY RH
- FRONT SPEED SENSOR ROTOR RH
*3
F
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The air conditioning amplifier assembly receives the ambient temperature signal, refrigerant pressure signal, etc. from various sensors.
Based on these signals, the air conditioning amplif
Removal
REMOVAL CAUTION / NOTICE / HINT COMPONENTS (REMOVAL)
Procedure Part Name Code
1 PRECAUTION
-
- -
2 SERVICE PLUG GRIP
G3834 -
- -
3 REMOVE CONNECTOR COVER ASSEMBLY
-
