TM 9-6115-730-24
0009
TROUBLESHOOTING USING GSC FAULT CODES - Continued
NOTE
If the sensor power supply is detected to be greater than 8.5 Vdc or less than 7.5 Vdc, this fault
code will appear.
SYMPTOM
33.
CID 269 FMI 03
CID 269 FMI 04
MALFUNCTION
GSC 8V Sensor Power Supply.
FMI 03 - Voltage Above Normal.
FMI 04 - Voltage Below Normal.
CORRECTIVE ACTION
STEP 1.
Turn the ENGINE CONTROL switch to OFF/RESET. Battery Disconnect switch
is OFF, DEAD CRANK SWITCH is OFF (to reset GSC).
STEP 2.
Set Battery Disconnect Switch to ON. Set DEAD CRANK SWITCH to NORMAL.
On EMCP turn the ENGINE CONTROL switch to COOL DOWN/STOP.
STEP 3.
Observe fault codes on GSC.
a. Disconnect low coolant sensor connector ENG-P16. Using DVM, measure
voltage between ENG-P16-A and ENG-P16-B. If voltage is between 7.5 and
8.5 Vdc go to STEP 3 d. If voltage is above 8.5 Vdc or below 7.5 Vdc go to
STEP 3 b.
b. Verify wiring on ECM to EMCP harness between GSC P37 and low coolant
c.
If wiring harness was repaired, verify the problem has been resolved.
d. Verify all programmable setpoints in the GSC (WP 0083).
e. If fault still appears on GSC, replace the GSC (WP 0041).
STEP 4.
Verify the problem has been resolved.
0009-28