4WAS Main Control Unit

DIAGNOSIS SYSTEM (4WAS MAIN CONTROL UNIT)

CONSULT Function [4WAS(MAIN)/RAS/HICAS]


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 main 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 status and the number of errors of 4WAS main control unit, ECM, ABS actuator and electric unit (control unit), 4WAS front control unit and the steering angle sensor are indicated.
- 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 rear actuator assembly activation is checked according to the control signal from CONSULT.
- The control signal forcibly activates (ON/OFF) 4WAS rear assembly, performs the self-diagnosis and checks each sensor in "SELF DIAGNOSTIC MODE".

CAUTION:
Perform the active test while the vehicle is stopped.





Standard value