Table 7-2, Torque Indication Test Points - Garmin G1000 Nxi System Maintenance Manual

6. If no other EIS gauge tests are needed, reconnect and safety the J102 connector and
reinstall the engine cowling(s).
If the right engine gauge needs to be tested, perform the following:
1. Disconnect the J103 firewall connector.
2. Apply external power to aircraft and start the G1000 system in normal mode.
3. Inject a DC voltage into GEA 2 by connecting the DC power source to the left engine
firewall connector-pins J103-C (HI) and J103-R (LO).
4. If the test input shows a correct gauge reading within the Indication tolerance in Table
7-2, troubleshoot the torque sensor per the Beechcraft King Air 300 Series Maintenance
Manual.
5. If the test input shows an incorrect gauge reading outside the Indication tolerance in
Table 7-2 perform the following:
a. Check gauge circuit wiring for faults.
b. Replace GEA 2.
6. If no other EIS gauge tests are needed, reconnect and safety the J103 connector and
reinstall the engine cowling(s).
Test Point (VDC)
Turbine Tach N1 Functional Check
Required test equipment:
If the left engine gauge needs to be tested, perform the following:
1. Disconnect the J104 firewall connector.
2. Apply external power to aircraft and start the G1000 system in normal mode.
3. Inject a 3Vrms sine wave signal into the No. 1 TACH-GEN Adapter by connecting the
Signal Generator to the left engine firewall connector-pins J104-J and J104-K.
4. Allow five seconds for the input signal to stabilize after changes before verifying the
indications.
5. If the test input shows a correct gauge reading within the Indication tolerance in Table
7-3, troubleshoot the tach sensor per the Beechcraft King Air 300 Series Maintenance
Manual.
G1000 NXi System Maintenance Manual
King Air 300 Series
190-00716-N1
0.000 ± 0.020
1.035 ± 0.020
1.725 ± 0.020
2.300 ± 0.020

Table 7-2, Torque Indication Test Points

Test Equipment
Signal Generator
Torque Indication (%)
0 ± 2
45 ± 2
75 ± 2
100 ± 2
Make/Requirement
0-10Vdc / 0 – 1k Hz
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