10-4 FUEL SYSTEM / TROUBLESHOOTING
ICON A5 / MAINTENANCE MANUAL CHANGE C2
4. Check condition of aircraft harness:
a. Remove the right baggage floor. (See “Baggage Floor Removal” on page 3-41.)
b. Remove the right seat back. (See “Seat Back Removal” on page 3-50.)
c. Unplug low-level switch from aircraft harness.
d. Check for continuity between the following pins in the aircraft harness connectors. If there
is no continuity, then the aircraft harness may be faulty.
Gauge Pin 1 and Sensor Pin 1
Gauge Pin 2 and Sensor Pin 9
Gauge Pin 3 and Sensor Pin 3
5. Reconnect gauge and low-level switch connectors.
6. Reinstall right seat back closeout and right baggage floor.
VERIFICATION METHOD:
While looking at fuel gauge, turn master switch on, then off.The red LED in the fuel level gauge should
flash momentarily after the switch is turned off. Several cycles may be needed to be sure of the results.
10.2.2 Fuel Pressure Diagnostic
Use Table 10-1 to diagnose the fuel system when the pressure is outside the normal limits (40.5-46.5
psi) or when FUEL PRESS illuminates on the annunciator panel. See “Annunciator Panel Diagnostic” on
page 13-9.
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