Clearing Codes - PREVOST Motorcoach XL Series Operator's Manual

d. Display will repeat cycle of a., b. and c. above
3. Press the "MODE" button momentarily to view
the second position (d2) in the same way as 2.
above.
4. To view the third, fourth and fifth positions
(d3,d4 and d5), momentarily press the "MODE"
button as explained above.
5. Pressing the "MODE" button momentarily after
the fifth position is displayed will cause the
sequence of code positions to start over with the
first position.
6. Any code which is active will be indicated by
the "MODE ON" indicator (active indicator) being
turned on while in that code position (while in the
normal operating mode, the "MODE ON" indicator
is turned on to indicate "ECONOMY" mode
operation, (refer to "Function of the mode button",
on page 2-7)).
7. Any code position in the list which does not
have a diagnostic code logged will display "- -" for
both the main and sub code displays.
positions after a code position without any code
will also not contain any codes.

Clearing Codes:

1. Clearing of the active indicator is automatically
done at ECU powerdown on all but code 69 34
(see code list, page 5-14).
2. Some codes will clear the active indicator
automatically when the condition causing the code
is no longer detected by the ECU.
3. Manual clearing is possible while in the
diagnostic display mode and after the condition
causing to code is corrected (output speed must
be zero).
a. To clear all active indicators, hold the
"MODE" button down continuously for 3
seconds until the shifter tone sounds for
0.5 seconds.
b. Release the "MODE" button to return to
normal operating mode. If the condition
causing the code was not active at the
time, the active indicator will turn off.
CAUTION: If clearing a code while locked in a
Forward or Reverse position (fail-to-range), the
transmission will still be in Drive or Reverse when
the clearing procedure is completed. Neutral must
be manually selected.
Exiting the diagnostic display mode:
The diagnostic display mode can be exited by any
of the following procedures:
1. Press the "↑" and "↓" (upshift and downshift)
buttons at the same time on the pushbutton
shifter.
All
2. Press any range button, "D", "N" or "R", on the
pushbutton shifter (the shift will be commanded if
it is not inhibited by an active code).
3. Do nothing and wait until the calibrated time
(approximately 10 minutes) has passed and the
system automatically returns to the normal
operating mode.
4. Turn off power to the ECU (turn off the vehicle
at the ignition switch).
5. After the clearing the active indicator procedure
described above has been performed.
Clearing records from the code list in
memory
5 - 12
TECHNICAL INFORMATION