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 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) Operate the GTS to read the Data List.
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 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 |
TRC(TRAC) OFF mode (TRC(TRAC) OFF/VSC ON) |
Displayed |
Does not come on |
|
Pressing and holding the VSC OFF switch |
VSC OFF mode (TRC(TRAC) OFF/VSC OFF) |
Displayed |
Comes on |
|
Result |
Proceed to |
|---|---|
|
Indicator light and mode condition display do not change (VSC OFF switch (for Instrument Panel Side)) |
A |
|
Indicator light and mode condition display do not change (VSC OFF switch (for Console Box)) |
B |
|
Mode condition display is normal, but indicator light does not change |
C |
|
Indicator light and mode condition display are normal |
D |
| B | .gif)
|
GO TO STEP 4 |
| C |
|
INSPECT METER / GAUGE SYSTEM |
| D |
|
USE SIMULATION METHOD TO CHECK |
|
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|
2. |
INSPECT VSC OFF SWITCH |
Click here .gif)
OK:
The VSC OFF switch is normal.
| NG |
|
REPLACE VSC OFF SWITCH |
|
|
3. |
CHECK HARNESS AND CONNECTOR (VSC OFF SWITCH - BRAKE ACTUATOR 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 A151 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the I250 VSC OFF switch 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 |
|---|---|---|
|
I250-5 (+) - A151-38 (CSW) |
Always |
Below 1 Ω |
|
I250-5 (+) or A151-38 (CSW) - Body ground |
Always |
10 kΩ or higher |
|
I250-2 (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 |
|
4. |
INSPECT COMBINATION SWITCH ASSEMBLY |
Click here
OK:
The VSC OFF switch (combination switch assembly) is normal.
| NG |
|
REPLACE COMBINATION SWITCH ASSEMBLY |
|
|
5. |
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 |
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Relay
On-vehicle InspectionON-VEHICLE INSPECTION PROCEDURE
1. INSPECT HEADLIGHT RELAY LH (a) Check the operation of the headlight relay LH.
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection Condition
Specified Condition
