TM 9-6115-730-24
0009
TROUBLESHOOTING USING GSC FAULT CODES - Continued
SYMPTOM
23.
CID 174 FMI 03
CID 174 FMI 04
MALFUNCTION
Fuel Temperature Sensor.
FMI 03 - Voltage Above Normal.
FMI 04 - Voltage Below Normal.
CORRECTIVE ACTION
STEP 1.
On EMCP, turn ENGINE CONTROL switch to OFF/RESET. Battery Disconnect
switch is OFF, DEAD CRANK SWITCH is OFF.
STEP 2.
Inspect connectors ENG-P2 on the engine harness (FO-2, sheet 1) and ENG-P1
on the ECM to EMCP Harness (FO-2, sheet 2).
STEP 3.
Conduct an appropriate pull test on wires in the ENG-P2 and ENG-P1 connectors
to ensure wires are tight and secure.
STEP 4.
Check the wires on both harnesses for abrasion and pinch points (WP 0088).
Repair and/or replace the connectors and/or wiring (WP 0088).
STEP 5.
Disconnect engine harness connector ENG-P105 from fuel temperature sensor
a. Use a jumper wire long enough to reach from engine harness connector
P105-1 to the engine ground stud.
b. Install jumper wire onto P105-1.
STEP 6.
Set Battery Disconnect Switch to ON, Set DEAD CRANK SWITCH to NORMAL.
Turn ENGINE CONTROL switch to COOL DOWN/STOP.
STEP 7.
On GSC keypad, press GSC ALARM CODES button.
a. Verify a diagnostic code 03 appears.
b. Short the jumper wire (ENG-P105-1) to the engine ground.
c.
Verify a diagnostic code 04 appears. This verifies the ECM is working
properly.
STEP 8.
Turn ENGINE CONTROL switch to OFF/RESET. Battery Disconnect Switch is
OFF; DEAD CRANK SWITCH is OFF.
STEP 9.
Remove the jumper wire and connect all wires and connectors.
If a diagnostic code 03 and/or a diagnostic code 04 did not appear in STEP 7,
check continuity between ENG-P105-1 to ENG-P2-33 and between ENG-P105-2
to ENG-P2-18, P100-2, and P105-2. Repair or replace the engine harness (WP
0088) as necessary.
STEP 10.
If the problem is not resolved, replace fuel temperature sensor (WP 0098).
STEP 11.
Verify the problem is resolved. If not, replace ECM (WP 0082).
STEP 12.
Verify the fault code has cleared.
0009-19
