Allison Transmission 5Th Generation Oil Level Check Using The Pushbutton Shift Selector - PREVOST X3-45 VIP 2017 Owner's Manual

APPENDIX C – Allison Transmission's Other Features
2
ALLISON TRANSMISSION 5TH
GENERATION OIL LEVEL CHECK
USING THE PUSHBUTTON SHIFT
SELECTOR
The oil level sensor (OLS) is standard in your
transmission. With the OLS and Allison 5
generation shift selector, you can get a more
accurate electronic fluid level check than with a
dipstick.
Oil level codes are obtained as follows:
1. Park vehicle on a level surface, select «N»
(neutral) on the pushbutton shift selector and
apply parking brake.
2. Wait for at least 2 minutes to allow the oil to
settle;
3. Press simultaneously the
(Downshift) arrow buttons once.
4. Oil level codes are displayed once the
following parameters are met :

The vehicle has been stationary for
approximately 2 minutes to allow the
oil to settle;

Engine at idle;

Oil at normal operating temperature,
between 104°F (40°C) and 220°F
(104°C);

Transmission in «N» (Neutral);

Transmission output shaft stopped;

Oil level sensor present and working.
5. Correct fluid level is
displayed as shown.
6. Low fluid level
displayed as shown. The
number indicates
number of quarts of fluid
the transmission
requires.
th
(Upshift) and
is
the
7. High fluid level condition
with the number of quarts
in excess is displayed as
shown.
NOTE
Confirm a low fluid level condition by making a
manual fluid level check.
8. To exit the Oil Level Display Mode, press
any range button «R», «N» or «D» at any
time.
NOTE
Note that the quantities LO 4 and HI 3 are the
largest values displayed and that the actual
variation in oil level may exceed these
numbers.
If the fluid level check cannot be completed, an
Invalid for Display fault is reported. Refer to table
below to review the codes and conditions.
CODE
SETTLING OK
ENG RPM TOO LOW
ENG RPM TOO HIGH
MUST BE IN NEU
OIL TEMP TOO LOW
OIL TEMP TOO HIGH
VEH SPD TOO HI
SENSOR FAILED
CAUSE OF FAULT
CODE
Settling time too short
Engine speed (rpm) too low
Engine speed (rpm) too high
N (Neutral) must be selected
Sump fluid temperature too low
Sump fluid temperature too
high
Output shaft speed
Sensor failure