BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS ELECTRONICALLY CONTROLLED BRAKE SYSTEM(w/ VSC OFF Switch) VSC OFF Switch Circuit
DESCRIPTION
The skid control ECU (brake actuator assembly) is connected to the combination meter assembly via CAN communication.
for Multi-information Display Type:
If the VSC OFF switch is pressed when the vehicle speed is 50 km/h or less, the system enters AUTO LSD mode and VSC operation stops. Also, the AUTO LSD indicator light and VSC OFF indicator light illuminate.
When the VSC OFF switch is pressed and held for 3 seconds or more with the vehicle stopped, the system enters VSC OFF mode and TRC and VSC operation stop. Also, a message indicating that TRC is canceled is displayed on the multi-information display in the combination meter assembly and the VSC OFF indicator light illuminates.
except Multi-information Display Type:
If the VSC OFF switch is pressed when the vehicle speed is 50 km/h or less, the system enters AUTO LSD mode and VSC operation stops. Also, the AUTO LSD indicator light and VSC OFF indicator light illuminate.
When the VSC OFF switch is pressed and held for 3 seconds or more with the vehicle stopped, the system enters VSC OFF mode and TRC and VSC operation stop. Also, the TRC OFF indicator light and VSC OFF indicator light illuminate.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
- NOTICE:
-
After replacing the skid control ECU (brake actuator assembly), perform acceleration sensor zero point calibration and store system information memorization.
PROCEDURE
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Enter the following menus: Chassis / Brake / Data List.
- Chassis > Brake > Data List
-
Tester Display Measurement Item Range Normal Condition Diagnostic Note TRC(TRAC)/VSC OFF Mode TRC (TRAC)/VSC off mode Normal mode (TRC (TRAC) ON/VSC ON) /
TRC (TRAC) OFF mode (TRC (TRAC) OFF/VSC ON) /
Not defined /
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): AUTO LSD mode
Not defined: Not defined
VSC OFF mode (TRC (TRAC) OFF/VSC OFF): VSC off mode-
- Chassis > Brake > Data List
-
Tester Display TRC(TRAC)/VSC OFF Mode - 50003 435 45
Check the indicator light and mode condition on the GTS changes according to VSC OFF switch operation.
- Standard:
for Multi-information Display Type: Switch Operation Mode Condition Display Multi-information Display ("TRC OFF message") 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) Not displayed Comes on Pressing and holding the VSC OFF switch VSC OFF mode (TRC (TRAC) OFF/VSC OFF) Displayed Comes on
except Multi-information Display Type: Switch Operation Mode Condition Display TRC 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 TRC (TRAC) OFF mode (TRC (TRAC) OFF/VSC ON) Does not come on Comes on Pressing and holding the VSC OFF switch VSC OFF mode (TRC (TRAC) OFF/VSC OFF) Comes on Comes on
- 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 are normal C
A
B
C
Inspect the VSC OFF switch.
- Result:
Proceed to OK NG
OK
NG
Make sure that there is no looseness at the locking part and the connecting part of the connector.
- OK:
The connector is securely connected.
Disconnect the A28 skid control ECU (brake actuator assembly) connector.
Disconnect the N6 VSC OFF switch connector.
Check both the connector case and the terminals for deformation and corrosion.
- OK:
No deformation or corrosion.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition N6-5 (+) - A28-22 (CSW) Always Below 1 Ω N6-5 (+) or A28-22 (CSW) - Body ground Always 10 kΩ or higher N6-2 (E) - Body ground Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG