TM 9-6115-730-24
0009
TROUBLESHOOTING USING GSC FAULT CODES - Continued
CORRECTIVE ACTION - Continued
STEP 3.
Inspect fuel filter. If fuel filter is clogged, replace fuel filter (WP 0080).
STEP 4.
Inspect air filter. If air filter is clogged, replace air filter (WP 0071).
STEP 5.
Check fuses A1F2 and A1F10 (per FO-4, sheet 5). If fuse is bad, replace fuse.
STEP 6.
Refer to engine troubleshooting if there is an obvious engine problem.
Troubleshooting without Fault Codes (WP 0011).
STEP 7.
Verify the problem has been resolved.
NOTE
This fault code means the ECM has stopped responding to the periodic requests for information
from the GSC.
SYMPTOM
56.
CID 590 FMI 09
MALFUNCTION
Engine Electronic Control Module.
FMI 09 - Abnormal Update.
CORRECTIVE ACTION
STEP 1.
Turn the ENGINE CONTROL switch to OFF/RESET. Battery Disconnect switch
is OFF, DEAD CRANK SWITCH is OFF.
STEP 2.
Verify continuity between GSC P7-19 and ECM ENG-P1-8 and between GSC
P7-20 and ECM ENG-P1-9 per FO-4, sheet 1 and FO-2, sheet 2.
a. Repair or replace harness, as required (WP 0088).
b. If harness is good, check all GSC fuses (FO-4, Sheets 3 and 5).
c.
If GSC fuses are OK, replace GSC (WP 0041).
d. If replacing GSC does not correct fault, replace ECM (WP 0082).
STEP 3.
Verify the problem has been resolved.
0009-47
