5.3 Troubleshooting Procedures for Two-Inch Gauges
Observe all gauges during the initialization period. Then pick the symptom in Table
5-2 that best describes what you see.
Troubleshooting Procedures 5-4 072-40245 B
Two-Inch Gauge Symptom Probable Cause Action
Fails initialization - pointer not at 12:00
and the gauge LED flashes or stays on.
Defective gauge. Replace the gauge.
Fails initialization - pointer at 12:00 but
the gauge LED never lights.
Defective gauge. Replace the gauge.
Passes initialization, but the pointer
stays at 12:00 and the LED stays on.
Defective gauge or
lifted programming tab
fingers.
Check program tab
seating. If okay, re-
place the gauge.
Fails initialization - pointer not at 12:00
and the gauge LED never lights.
Power connection; de-
fective gauge.
Go to Section 5.3.1 on
page 5-5.
Passes initialization, but then the
pointer goes to 7:00 and the LED
flashes.
Sensor or sensor wir-
ing.
Go to Section 5.3.2 on
page 5-6.
Passes initialization, but the gauge is
inaccurate in actual use.
Sender/sensor failure. Go to Section 5.3.2 on
page 5-6.
Passes initialization, but then the
pointer sweeps back and forth and
stops at 10:00 position with the LED on.
Data bus (J1708 or pri-
vate) problem; defec-
tive Interface Module.
Go to Section 5.5 on
page 5-25.
Passes initialization, but the LED stays
on and the SMC displays a warning
message.
387 System okay and
indicating a vehicle or
engine condition
which may require at-
tention.
Go to Section 5.6 on
page 5-33.
No 2-inch gauge backlighting when
headlights switched on.
Missing lamp power. Go to Section 5.7.1 on
page 5-34.
Table 5-2 Two-Inch Gauge Problems
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