TM 9-6115-729-24
0009
TROUBLESHOOTING USING GSC FAULT CODES - Continued
NOTE
When the GSC activates the EGR, K1 is displayed on the GSC lower display.
SYMPTOM
49.
CID 441 FMI 12
MALFUNCTION
GSC engine governor relay (EGR) 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.
Verify that GSC relay module A1-13 is connected to ground A1-28 when the
PUSH TO STOP EMERGENCY STOP pushbutton (ESPB) is pulled out per
FO-4, sheet 5.
a. Repair or replace control box harness between ESPB and GSC (WP 0043
and WP 0090), as necessary.
b. If harness is good, replace ESPB (WP 0041).
STEP 3.
Verify continuity of wiring between GSC pins A1-13 and A1-14 (RM-13 and
RM-14) and the ECM per FO-4, sheets 1 and 5, FO-1, sheet 2.
a. Repair or replace harness between GSC and ECM (WP 0090), as
necessary.
b. Verify harness is good. If so, check all GSC fuses (FO-4, Sheets 3 and 5). If
GSC fuses are ok, replace GSC (WP 0040). Verify the problem has been
resolved. If not, proceed to the next step.
c.
If harness is good and GSC is good, replace ECM (WP 0084).
STEP 4.
Verify the problem has been resolved.
0009-41
