54A-DIAGNOSTIC FUNCTION

DIAGNOSIS FUNCTION

CHECK OF FREEZE FRAME DATA

To detect fault and set the DTC, the ETACS-ECU obtains data before the confirmation of the DTC and data when the DTC is confirmed, and then stores the current condition of the ETACS-ECU. By analyzing each data from scan tool (M.U.T.-III), the troubleshooting can be performed more efficiently. Display items of the freeze frame data are as follows.

Display item list

Item No.	Item name	Data item	Unit
1	Odometer	Total driving distance after the DTC is generated	mile
2	Ignition cycle	Number of times the ignition switch is turned "ON" or "LOCK" (OFF) after the past failure transition.	Number of counts is displayed.
3	Elapsed time	Total elapsed time after a DTC is generated	min^*
4	Accumulated minute	Cumulative time for current malfunction of DTC	min

note

^*: Total elapsed time can be stored up to 65534 minutes. The display of scan tool (M.U.T.-III) is fixed to 65534 minutes after 65534 minutes have elapsed. Or, if the battery is disconnected, the total elapsed time cannot be measured properly. Thus, 65535 minutes (null value) is displayed. Since the value is calculated according to the information from the ETACS-ECU, a proper value may not be displayed when the ETACS-ECU time-out has occurred.