Diagnostic trouble codes (DTCs)

If the control module detects a fault it stores a diagnostic trouble code (DTC) and the ROPS indicator lamp light lights. When the ignition is switched on the lamp should light for approximately 5 seconds and then go out if no diagnostic trouble code (DTC) is stored. The control module can store up to 10 diagnostic trouble codes (DTCs). If for some reason a fault disappears after the diagnostic trouble code (DTC) has been permanently stored in the control module, information about the fault remains in the control module.

Each diagnostic trouble code (DTC) has a total of 4 fault clocks which store information about the start time and any end time for the fault. Both the absolute start and end time are in relation to the total time that the system has been active via the ignition being on. The relative start and end time show the time the fault occurred or disappeared during the time the ignition was last on. The absolute time shows the day and the relative time shows the hours, minutes and seconds. If the fault reoccurs the end time is reset and the fault code counter (counter 2) counts up by 1.

Each diagnostic trouble code (DTC) has a counter (1) which displays if the fault is passive (intermittent) or active (permanent). If the counter value is 0 the fault is intermittent; if the value is greater than 0 the fault is permanent. The counter is uses during fault-tracing which enables easy checking of the fault status; whether it disappears or remains. The diagnostic trouble code (DTC) status bar is updated continuously and switches to intermittent fault if the fault becomes inactive. However if the fault is passive and switches to active, the diagnostic trouble code (DTC) status bar switches to permanent fault.