freightliner S2 - Page 66

•
One bar illuminated amber—DEF very low, re-
fill DEF
•
One bar flashing red—DEF empty, refill DEF
DEF Warnings and Engine Limits
IMPORTANT: Ignoring the DEF warning lamps
and not refilling the DEF will result in limited en-
gine power with a speed limit of 5 mph (8 km/h)
eventually being applied. See the Cummins Op-
eration and Maintenance Manual for further in-
formation.
DEF Level Low—Initial and Critical
Warnings
When the DEF level reads low the following warnings
strongly encourage the driver to refill the DEF tank.
See
Fig. 9.8.
•
The DEF warning lamp illuminates constantly
(initial warning).
•
The DEF warning lamp flashes (critical warn-
ing).
•
DEF-level lightbar illuminates solid amber.
DEF Empty
When the DEF level reads empty, the following warn-
ings are activated. See
Fig. 9.9.
•
One bar of the DEF-level lightbar flashes red.
•
The DEF warning lamp flashes.
•
The CHECK engine lamp illuminates.
Engine performance is limited, with progressively
harsher engine power limits applied.
The DEF tank must be filled to cancel the warning
sequence.
DEF Level Empty and Ignored
If the empty warning is ignored and the DEF is not
refilled, the red STOP engine lamp illuminates in ad-
dition to the DEF warning lamp and the CHECK en-
gine warning lamp. See
Fig. 9.10.
11/08/2010 f611037
B
1/2
ULTRA LOW SULFUR
DIESEL FUEL ONLY
EF
DEF
FE
1/2
ULTRA LOW SULFUR
DIESEL FUEL ONLY
EF
DEF
FE
1/2
ULTRA LOW SULFUR
DIESEL FUEL ONLY
EF
DEF
FE
A C
1
2
A. Green bars—DEF level indicators.
B. One bar illuminated amber—DEF very low, refill DEF.
C. One bar flashing red—DEF empty, refill DEF.
1. Low Fuel Warning Lamp (amber at 1/8 tank of fuel) 2. Low DEF Warning Lamp
Fig. 9.7, Fuel/DEF Gauge
A
B
07/09/2009 f470537
A. DEF Warning Lamp (solid amber)
B. DEF-Level Lightbar (1 bar solid amber)
Fig. 9.8, DEF Level Low Initial and Critical Warnings
Exhaust Aftertreatment Systems
9.6