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Observe all gauges during the initialization period. Then pick the symptom in Table
5-2 that best describes what you see.
Two-Inch Gauge Symptom
Fails initialization - pointer not at 12:00
and the gauge LED flashes or stays on.
Fails initialization - pointer at 12:00 but
the gauge LED never lights.
Passes initialization, but the pointer
stays at 12:00 and the LED stays on.
Fails initialization - pointer not at 12:00
and the gauge LED never lights.
Passes initialization, but then the
pointer goes to 7:00 and the LED
flashes.
Passes initialization, but the gauge is
inaccurate in actual use.
Passes initialization, but then the
pointer sweeps back and forth and
stops at 10:00 position with the LED on.
Passes initialization, but the LED stays
on and the SMC displays a warning
message.
No 2-inch gauge backlighting when
headlights switched on.
Probable Cause
Action
Defective gauge.
Replace the gauge.
Defective gauge.
Replace the gauge.
Defective gauge or
Check program tab
lifted programming tab
seating. If okay, re-
fingers.
place the gauge.
Power connection; de-
Go to Section 5.3.1 on
fective gauge.
page 5-5.
Sensor or sensor wir-
Go to Section 5.3.2 on
ing.
page 5-6.
Sender/sensor failure. Go to Section 5.3.2 on
page 5-6.
Data bus (J1708 or pri-
Go to Section 5.5 on
vate) problem; defec-
page 5-25.
tive Interface Module.
387 System okay and
Go to Section 5.6 on
indicating a vehicle or
page 5-33.
engine condition
which may require at-
tention.
Missing lamp power.
Go to Section 5.7.1 on
page 5-34.
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