TROUBLESHOOTING USING GSC FAULT CODES - Continued
CID 334 FMI 02
CID 334 FMI 03
CID 334 FMI 04
Cool Down circuit (P7-36).
FMI 02 - Erratic, Intermittent, or Incorrect Signal.
FMI 03 - Voltage Above Normal.
FMI 04 - Voltage Below Normal.
Set Battery Disconnect Switch to ON, Set DEAD CRANK SWITCH to NORMAL.
Turn the ENGINE CONTROL switch to COOL DOWN/STOP.
Measure voltage between cool down relay (CDR) pin 13 (+) and TB3-1 (-) per
FO-4, sheets 2 and 4.
a. If voltage is not approximately 24 Vdc (battery voltage), repair or replace
control box harness (WP 0041). Verify the problem has been resolved.
b. If harness is good, replace relay CDR (WP 0041). Verify the problem has
If harness repair does not resolve fault and CDR is good, check all GSC
fuses (FO-4, Sheets 3 and 5).
d. If GSC fuses are ok, continue with STEP 3.
Turn the ENGINE CONTROL switch to MANUAL START and allow engine to
accelerate to operating speed.
After the engine has run for approximately 3 minutes, turn the ENGINE
CONTROL switch to COOL DOWN/STOP.
Measure voltage between cool down relay (CDR) pin 13 (+) and GSC P7-36 (-)
for voltage of less than 1.0 Vdc, per FO-4, sheets 1, 2, and 4.
If voltage is not less than 1.0 VDC, replace GSC (WP0040).
Verify the problem has been resolved.