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Operation - Section 3
Page 3-22
(27) ALT. FAULT Light
This light will illuminate if the alternator output exceeds
30 VDC, or battery voltage is less than 24 VDC, or if
voltage for each battery differs more than 0.75 V.
(28) EQUAL FAULT Light
The charge condition of the two 12 Volt batteries is
monitored to make sure that both batteries are being
charged equally. The Equal Fault Light will illuminate if
more than a 0.85 volt variance between the two batter-
ies is detected.
(29) CHECK TRANS Light
The ATEC system has a controller that monitors vari-
ous functions and performances. When the controller
senses that the system is not performing properly, the
CHECK TRANS light turns "On" to alert the operator
that a problem has occurred and that the vehicle
should be serviced as soon as possible. The CHECK
TRANS light will turn "On" when the ignition is turned
"On". After about 2 seconds, the light will go "Off". This
provides both a light bulb check and a system check.
In cold weather, when the transmission oil is below
o
o
-10
F (-23
C), the DO NOT SHIFT lights on the range
selector and the CHECK TRANS light will stay on after
the engine is started. The transmission will stay in
NEUTRAL, regardless of which range is selected until
the oil is warmer than -10
mission oil warms up, the CHECK TRANS and DO NOT
SHIFT lights will turn off and the transmission will
operate in first gear or reverse only. At 20
transmission may be operated safely in all ranges.
Do Not
Sump Oil
Shift
Temperature
Light
-10°F (-24°C)
ON
And BELOW
-9°F (-23°C)
to
OFF
+ 19°F (-7°C)
+ 20°F (-6°C)
OFF
And ABOVE
If the transmission oil temperature reaches 250
o
(121
C), the CHECK TRANS indicator light will come
"On". The ECU (Electronic Control Unit) will inhibit
operation of the truck in higher gears.
NOTE: The Transmission Temperature Gauge (8) indi-
cates the converter temperature. The ECU senses oil
temperature in the sump.
The two temperatures may be different.
o
o
F (-23
C). When the trans-
o
o
F (-7
C), the
Check
Truck
Trans
Operation
Light
NEUTRAL
ON
ONLY
NEUTRAL,
OFF
1st (FIRST), &
REVERSE Only
Full Operation
OFF
In All Ranges
o
(30) Emergency Steering
have the system checked.
Do not attempt further operation until malfunction
is located and corrected.
(31) Brake Lock
(32) Low Brake Pressure Warning Light
or comes "On" continuously, bring truck to a safe
stop as soon as possible out of way of traffic. Move
transmission range selector to Neutral, shut engine
down, apply parking brake and call maintenance
personnel to correct problem.When the pressure
drops to 1650 psi (11.4 MPa), all brakes will auto-
matically be fully applied to stop the truck.
F
(33) Parking Brake
OM3012.3
Instrument Panel and Controls
The Emergency Steering Light,
when actuated, indicates that the
steering circuit pressure is decreas-
ing and is below 1800 psi (12.4
MPa).
If the light comes
"On", stop the truck
immediately and
The Brake Lock light is on only when
the brake lock switch has been ac-
tivated by the operator. The light
indicates that only the rear brakes
have been applied. The brake lock
switch is to be used only at the
shovel or dump area.
This light indicates a malfunction
within the hydraulic brake circuit.
The low brake pressure warning
light indicates that the hydraulic
pressure in the brake system is de-
creasing and is below 2000 psi (13.8
MPa).
If this light comes
"On" when the brake
pedal is depressed
The Parking Brake light indicates
that the parking brake switch has
been moved to the "On" position or
that the park brake is "On".
Do not use the parking brake
while loading or dumping.
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