service reset RAM CHASSIS CAB 2009 Owners Manual

15. Shift Lever Indicator (Automatic Transmission
Only)
This display indicator shows the automatic transmission
shift lever selection.
NOTE:You must apply the brake before shifting from
PARK.
16. Odometer/Trip Odometer
The odometer shows the total distance the vehicle has
been driven. U.S. federal regulations require that upon
transfer of vehicle ownership, the seller certify to the
purchaser the correct mileage that the vehicle has been
driven. Therefore, if the odometer reading is changed
during repair or replacement, be sure to keep a record of
the reading before and after the service so that the correct
mileage can be determined.
The two trip odometers show individual trip mileage. To
switch from odometer to trip odometers, press and
release the Trip Odometer button. To reset a trip odometer, display the desired trip odom-
eter to be reset then push and hold the button until the
display resets (approximately two seconds).
Vehicle Warning Messages
When the appropriate conditions exist, messages such as
“door” (indicates that a door(s) may be ajar), “hood” (if
the hood is open or ajar, on vehicles with remote start),
“gASCAP” (indicates that your gas cap is possibly loose
or damaged), “Low Tire” (indicates low tire pressure),
\6CHANgE OIL” (indicates that the engine oil should be
changed), “LoWASH” (low washer fluid), and “noFUSE”
(indicates that the IOD fuse is removed from the Inte-
grated Power Module), will display in the odometer.
NOTE:
There is also an engine hour function. This
indicates the total number of hours the engine has been
running. To display the engine hours perform the follow-
ing: Place the ignition in RUN, but do not start the
engine. With the odometer value displayed, hold the trip
166 UNDERSTANDING YOUR INSTRUMENT PANEL

engine is running, immediate service is required and you
may experience reduced performance, an elevated/
rough idle or engine stall and your vehicle may require
towing. The light will come on when the ignition is first
turned on and remain on for 15 seconds as a bulb check.
If the light does not come on during starting, have the
system checked by an authorized dealer.
22. SERV 4WD IndicatorThe 4WD indicator will be illuminated when-
ever the 4WD mode is engaged for either the
manual or electric shift 4WD systems. The
SERV 4WD indicator monitors the electric shift
4WD system. If the SERV 4WD light stays on or comes on
during driving, it means that the 4WD system is not
functioning properly and that service is required. 23. Transmission Temperature Indicator (Automatic
Transmissions Only)
This light indicates that there is excessive trans-
mission fluid temperature that might occur
with severe usage such as trailer towing. It may
also occur when operating the vehicle in a high
torque converter slip condition, such as 4-wheel drive
operation (e.g., snow plowing, off-road operation). If this
light comes on, stop the vehicle and run the engine at idle
or faster, with the transmission in NEUTRAL until the
light goes off.
24. Odometer/Trip Odometer Button
Press this button to toggle between the odometer and the
trip odometer display. Holding the button in resets the
trip odometer reading when in trip mode.
25. Fuel Gauge
Shows level of fuel in tank when ignition switch is in the
ON position.
UNDERSTANDING YOUR INSTRUMENT PANEL 171
4

ONBOARD DIAGNOSTIC SYSTEM (OBD II)
Vehicles with 5.7L engines are equipped with a sophisti-
cated onboard diagnostic system called OBD II. This
system monitors the performance of the emissions, en-
gine, and automatic transmission control systems. When
these systems are operating properly, your vehicle will
provide excellent performance and fuel economy, as well
as engine emissions well within current government
regulations.
If any of these systems require service, the OBD II system
will turn on the Malfunction Indicator Light (MIL). It will
also store diagnostic codes and other information to
assist your service technician in making repairs. Al-
though your vehicle will usually be driveable and not
need towing, see your authorized dealer for service as
soon as possible.CAUTION!
Prolonged driving with the MIL on could cause
further damage to the emission control system. It
could also affect fuel economy and driveability. The
vehicle must be serviced before any emissions tests
can be performed.
If the MIL is flashing, severe catalytic converter
damage and power loss will soon occur. Immediate
service is required.
Loose Fuel Filler Cap Message
If the vehicle’s diagnostic system determines that the fuel
filler cap is loose, improperly installed, or damaged, a
gASCAP message will be displayed in the instrument
cluster. Tighten the gas cap until a “clicking” sound is
heard. This is an indication that the gas cap is properly
tightened. Press the odometer reset button to turn the
message off. If the problem persists, the message will
336 MAINTAINING YOUR VEHICLE