TM 9-6115-729-24
0009
TROUBLESHOOTING USING GSC FAULT CODES - Continued
NOTE
This fault code means the ECM has stopped responding to the periodic requests for information
from the GSC.
SYMPTOM
58.
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 0090).
b. If harness is good, check all GSC fuses (FO-4, Sheets 3 and 5).
c.
If GSC fuses are ok, replace GSC (WP 0040).
d. If replacing GSC does not correct fault, replace ECM (WP 0084).
STEP 3.
Verify the problem has been resolved.
0009-49
