TM 9-6115-730-24
0009
TROUBLESHOOTING USING GSC FAULT CODES - Continued
NOTE
When active GSC RR output displays K5 on GSC lower display.
SYMPTOM
50.
CID 445 FMI 12
MALFUNCTION
GSC Run Relay (RR) Output.
FMI 12 - Failed Component.
CORRECTIVE ACTION
STEP 1.
Turn the ENGINE CONTROL switch to OFF/RESET. Battery Disconnect switch
is OFF, DEAD CRANK SWITCH is OFF.
STEP 2.
Remove fuse A1F6 from rear of GSC.
STEP 3.
Check fuse A1F6.
a. If fuse is bad, replace A1F6. Verify the problem has been resolved.
b. If fuse is not bad, repair or replace wiring harness (WP 0088 Table 1 and
Table 2 and WP 0044).
c.
If wiring is good proceed to the next step.
STEP 4.
Disconnect wire(s) from GSC relay module A1-24 per FO-4, sheet 5.
STEP 5.
Measure the resistance between relay module A1-8 and A1-24. Resistance
should be greater than 5,000 ohms. Record resistance measurement.
STEP 6.
Set Battery Disconnect Switch to ON. Set DEAD CRANK SWITCH to NORMAL.
Turn ENGINE CONTROL switch to MANUAL START.
STEP 7.
Measure the resistance between A1-8 and A1-24. If resistance not less than 5
ohms or the resistance was not greater than 5,000 ohms, measured in STEP 5,
check all GSC fuses (FO-4, Sheets 3 and 5). If GSC fuses are ok, replace GSC
STEP 8.
Turn the ENGINE CONTROL switch to OFF/RESET. Battery Disconnect Switch
is OFF; DEAD CRANK SWITCH is OFF.
STEP 9.
Reinstall fuse A1F6 and reconnect wire(s) to GSC A1-24.
STEP 10.
Verify the problem has been resolved.
0009-42
