TM 9-6115-729-24
0009
TROUBLESHOOTING USING GSC FAULT CODES - Continued
NOTE
The programmable spare relays (PSR1 and PSR2) are used for activating customer equipment.
PSR1 is normally closed while PSR2 is normally open.
SYMPTOM
55.
CID 448 FMI 12
MALFUNCTION
GSC programmable spare relays (PSR1 and PSR2) 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 A1F8 and A1F9 from rear of GSC.
STEP 3.
Check fuse A1F8 and A1F9.
a. If fuse is bad, replace A1F8 and/or A1F9. Verify the problem has been
resolved.
b. If fuse is not bad, repair or replace wiring harness (WP 0090 Table 1 and
Table 2 and WP 0043) as necessary. Verify the problem has been resolved.
c.
If wiring is good, proceed to the next step.
STEP 4.
Disconnect wire(s) from GSC relay module (RM) A1-26 per FO-4, sheet 5.
STEP 5.
On the GSC relay module, measure resistance between RM-25 and RM-11.
Resistance should be greater than 5000 ohms. Measure resistance between
RM-26 and RM-10. Resistance should be less than 5 ohms.
STEP 6.
Set Battery Disconnect Switch to ON. Set DEAD CRANK SWITCH to NORMAL..
Turn ENGINE CONTROL switch to MANUAL START.
STEP 7.
Measure resistance between RM-25 and RM-11. Resistance should be less than
5 ohms. Measure resistance between RM-26 and RM-10. Resistance should be
greater than 5000 ohms.
STEP 8.
Turn the ENGINE CONTROL switch to OFF/RESET. Battery Disconnect Switch
is OFF; DEAD CRANK SWITCH is OFF.
STEP 9.
If any of the measurements fail, check all GSC fuses (FO-4, Sheets 3 and 5). If
GSC fuses are ok, replace GSC (WP 0040).
STEP 10.
Reinstall fuse A1F8 and A1F9 and reconnect wire(s) to GSC A1-26.
STEP 11.
Verify the problem has been resolved.
0009-46
