
Page 5-10 G1000 System Maintenance Manual – Diamond DA40/40F
Revision G 190-00545-01
5.2.2 Engine/Airframe Instrument Failures
The following table provides guidance for troubleshooting individual engine/airframe sensor failures. Be
sure to also follow previous guidance given for the GEA 71. The technician should troubleshoot to
isolate the fault by checking sensor-to-GEA wiring, replacing the suspect sensor, and finally by replacing
the GEA 71. Replace one part at a time. Refer to Section 7.4.2 to check for correct operation of the
sensors and GEA 71 after any part has been replaced.
Table 5-3. Engine Airframe Instrument Failures
Invalid Field Sensor Solution
Tachometer
Check tachometer – GEA wiring.
Replace tachometer sensor. Refer to G1000/DA40 Install
Drawing, 005-00304-00 or OAM 40-222 for DA 40 F.
Replace defective GEA 71.
MAP Sensor
(DA 40 Only)
Check MAP sensor – GEA wiring.
Replace MAP sensor. Refer to G1000/DA40 Install Drawing
005-00304-00 or OAM 40-222 for DA 40 F.
Replace defective GEA 71.
Fuel Pressure
Check fuel pressure sensor – GEA wiring.
Troubleshoot/replace fuel pressure sensor. Refer to the
G1000/DA40 Install Drawing, 005-00304-00 for DA 40, and OAM
40-222 for DA 40 F.
Fuel Flow
Check fuel flow sensor – GEA wiring.
Replace fuel flow sensor. Refer to G1000/DA40 Install Drawing,
005-00304-00 or OAM 40-222 for DA 40 F.
Replace defective GEA 71.
CHT Probes
(4)
For one CHT indicator that is flagged, check the following:
Check CHT probe – GEA wiring.
Replace CHT probe. Refer to G1000/DA40 Install 005-00304-00
or OAM 40-222 for DA 40 F.
If all 4 CHT indicators are flagged, check the following:
Replace backshell thermocouple and/or configuration module in
GEA connector. See Sections 6.12 & 6.13..
Replace defective GEA 71.
EGT Probes
(4)
For one EGT indicator that is flagged, check the following:
Check EGT probe – GEA wiring.
Replace EGT probe. Refer to G1000/DA40 Install 005-00304-00
or OAM 40-222 for DA 40 F.
If all 4 EGT indicators are flagged, try the following:
Replace backshell thermocouple and/or configuration module in
GEA connector. See Sections 6.12 & 6.13..
Replace defective GEA 71.
Oil Pressure Sensor
Check oil pressure sensor – GEA wiring.
Replace oil pressure sensor. Refer to G1000/DA40 Install
Drawing, 005-00304-00 or OAM 40-222 for DA 40 F.
Replace defective GEA 71.
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