4WAS Front Control Unit

DIAGNOSIS SYSTEM (4WAS FRONT CONTROL UNIT)

CONSULT Function [4WAS(FRONT)]


APPLICATION ITEMS

CONSULT can display each diagnostic item using the diagnostic test modes as follows.





*1 : The following diagnosis information is erased by erasing.
- DTC
- Freeze frame data (FFD)
*2 : Communication line between 4WAS front control unit and 4WAS main control unit

ECU IDENTIFICATION

4WAS front control unit part number can be read.

SELF DIAGNOSTIC RESULT

Testing and Inspection.
- It indicates that the system is presently malfunctioning.
- It indicates that system malfunction in the past is detected, but the system is presently normal.
NOTE:
Each time when ignition switch is turned OFF to ON, numerical number increases in 1->2->3...38->39.
When the operation number of times exceeds 39, the number do not increase and "39" is displayed until self-diagnosis is erased.
FREEZE FRAME DATA (FFD)
The following vehicle status is recorded when DTC is detected and is displayed on CONSULT.















* : Communication line between 4WAS front control unit and 4WAS main control unit

DATA MONITOR











* : Communication line between 4WAS front control unit and 4WAS main control unit

CAN DIAGNOSTIC SUPPORT MONITOR

- The communication condition from 4WAS front control unit to 4WAS main control unit and malfunction counter are displayed.
- Error counter displays OK if any malfunction is not detected in the past. If the malfunction is detected, it displays 0. The upper limit of the counters is 39.





- OK : It is normal.
- UNKWN : CONSULT cannot receive (transmit) the data transmitted (received) by the diagnosed unit normally.
- OK : It is normal.
- When "0" is displayed : It indicates that the system is presently malfunctioning.
- When except "0" is displayed : It indicates that system malfunction in the past is detected, but the system is presently normal.
NOTE:
Each time when ignition switch is turned OFF to ON, numerical number increases in 1->2->3...38->39.
When the operation number of times exceeds 39, the number do not increase and "39" is displayed until self-diagnosis is erased.

ACTIVE TEST MODE

Description
- 4WAS front actuator assembly activation is checked according to the control signal from CONSULT.
- 4WAS front lock solenoid valve (lock structure) is activated forcibly (ON/OFF) using each control signal of
"LOCK OPERATION". Perform this mode when performing 4WAS front actuator adjustment.

CAUTION:
Never steer the steering wheel during "RELEASE".
- The steering angle sensor neutral point judgment (OK/NG) is performed using each control signal of "SLOW
MODE".