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Probable Cause - This usually indicates that a specific problem on the vehicle needs
attention or that something is not operating within normal limits.
Warning messages are listed in Table 5-6. Read the message and determine what con-
dition is causing it. Repair as necessary following normal vehicle maintenance and
repair procedures.
System fault messages are listed in Table 5-7.
If you suspect the alarm condition is false and a problems does not really exist, then
follow the troubleshooting procedures for that gauge by going to Section 5.3.2.
Warning
Condition
Message
H2O TMP
Coolant temperature high
LOW AIR1
Air tank #1 pressure low
LOW AIR2
Air tank #2 pressure low
OILPRES
Engine oil pressure low
OIL TEMP
Engine oil temperature high
TRANTMP
Main transmission oil
temperature high
CAUTION! If a message that is not listed in this table appears, do not ignore it. The vehicle
should be serviced regardless of the message that appears.
Fault Message
IM DIAG, IM CAL, IM CFG, IM LIN, IM
SLFT (may also be associated with a partic-
ular gauge showing a sweeping pointer).
ODO ERR
SMC MEM
Associated
Gauge LED
Water Temperature
Primary Air Pressure
Secondary Air Pressure
Engine Oil Pressure
Engine Oil Temperature
Main Transmission Oil Tem-
perature
Action
Replace the Interface Module.
Replace the SMC.
Each time this message appears, the odometers may
lose from 0.1 to 20 miles per occurrence. If message
appears more than once, replace SMC.
Reset
Message
H2OT OK
AIR1 OK
AIR2 OK
OIL OK
OILT OK
TRAN OK
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