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Fuel/Diesel Exhaust Fluid (DEF)
Gauge, EPA10
For engines that are EPA10-compliant, the fuel and
DEF levels are measured in a dual purpose fuel/DEF
gauge. See
Fig. 3.14
.
The diesel fuel level is indicated at the top of the
gauge, with a low-fuel warning lamp that illuminates
when the diesel fuel level registers 1/8th of capacity.
The DEF level is indicated in the lightbar on the
lower portion of the gauge. There is a low DEF level
warning lamp that illuminates when the DEF level
reaches 10% of capacity. See
Chapter 7
for details of
the DEF gauge functions.
Speedometer
Three speedometer options (see
Fig. 3.15
) are avail-
able. The U.S. version of the speedometer registers
speed in both miles per hour (mph) and kilometers
per hour (km/h), with mph in larger numbers. The
metric version of the speedometer face reverses this
arrangement, with km/h in larger numbers. The
metric-only version shows km/h exclusively.
Voltmeter
The voltmeter is a digital readout located on the bot-
tom line of the dash message center whenever the
ignition switch is turned on.
The voltmeter indicates the vehicle charging system
voltage when the engine is running and the battery
voltage when the engine is off. By monitoring the
voltmeter, the driver can stay aware of potential bat-
tery charging problems and have them fixed before
the batteries discharge enough to create starting diffi-
culties.
The voltmeter will normally show approximately 13.7
to 14.1 volts when the engine is running. The voltage
of a fully charged battery is 12.7 to 12.8 volts when
the engine is off. Battery voltage under 12.0 volts is
considered a low battery, and a completely dis-
charged battery will produce only about 11.0 volts.
The voltmeter will indicate lower voltage as the ve-
hicle is being started or when electrical devices in
the vehicle are being used.
10/09/2001
f610566
E
F
1/2
FUEL
Fig. 3.13, Fuel Level Gauge, Pre-EPA10
08/21/2009
1/2
ULTRA LOW SULFUR
DIESEL FUEL ONLY
E
F
DEF
F
E
f611045
1
2
3
4
1.
Diesel Fuel Level
Indicator
2.
DEF Level Indicator
3.
Low DEF Warning
Lamp (amber below
10% DEF)
4.
Low Fuel Warning
Lamp (amber at 1/8
tank of fuel)
Fig. 3.14, Fuel/DEF Gauge, EPA10
10/09/2001
0
5
10
15
20
30
RPM
5
15
25
35
45
55
65
75
85
MPH
km/h
25
X100
30
50
70
90
130
110
10
1
2
f610527
1.
Tachometer
2.
Speedometer
Fig. 3.15, Speedometer and Tachometer (U.S. version)
Instruments
3.11