STARTING AND OPERATING
150
Transmission Limp Home Mode
Transmission function is monitored electron
-
ically for abnormal conditions. If a condition
is detected that could result in transmission
damage, Transmission Limp Home Mode is
activated. In this mode, the transmission
remains in fourth gear (for 68RFE transmis
-
sion) or third gear (for AS69RC transmission)
regardless of which forward gear is selected.
If an AS69RC-equipped truck enters Limp
Home Mode at highway speeds, it will
initially engage fifth gear, until the vehicle
slows to a speed where third gear can be
engaged. PARK, REVERSE, and NEUTRAL
will continue to operate. The Malfunction
Indicator Light (MIL) may be illuminated.
Limp Home Mode allows the vehicle to be
driven to an authorized dealer for service
without damaging the transmission.
In the event of a momentary problem, the
transmission can be reset to regain all
forward gears by performing the following
steps:
1. Stop the vehicle.
2. Shift the transmission into PARK.
3. Turn the ignition OFF.
4. Wait approximately 10 seconds.
5. Restart the engine.
6. Shift into the desired gear range. If the
problem is no longer detected, the trans
-
mission will return to normal operation.
NOTE:
Even if the transmission can be reset, we
recommend that you visit your authorized
dealer at your earliest possible convenience.
Your authorized dealer has diagnostic equip
-
ment to assess the condition of your trans
-
mission.
If the transmission cannot be reset, autho
-
rized dealer service is required.
Electronic Range Select (ERS) Operation
The Electronic Range Select (ERS) shift
control allows the driver to limit the highest
available gear when the transmission is in
DRIVE. For example, if you set the transmis
-
sion gear limit to 4 (fourth gear), the trans
-
mission will not shift above fourth gear, but
will shift through the lower gears normally.
You can switch between DRIVE and ERS
mode at any vehicle speed. When the gear
selector is in the DRIVE position, the trans
-
mission will operate automatically, shifting
between all available gears. Tapping the ERS
(-) switch will activate ERS mode, display the
current gear in the instrument cluster, and
set that gear as the top available gear. Once
in ERS mode, tapping the ERS (-) or (+)
switch will change the top available gear.
ERS Control
1 — GEAR + Switch 2 — GEAR – Switch
2019_RAM_2500_3500_UG_USA=GUID-8BBFE451-BF24-4E82-808A-AE2460D39A05=1=en=.book Page 150
Summary of Contents for 2500 2019
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