TM 9-6115-729-24
0011
TROUBLESHOOTING FAILURES WITHOUT FAULT CODES - Continued
MALFUNCTION
Engine Temperature Low.
CORRECTIVE ACTION
STEP 1.
Set Battery Disconnect Switch to ON. Set DEAD CRANK SWITCH to NORMAL.
On EMCP set ENGINE CONTROL switch to START.
STEP 2.
Check coolant temperature using GSC.
a. Coolant temperature should start at ambient temperature and rise above
64F (17C) as the engine warms up.
b. If GSC temperature reading does not increase properly, replace coolant
temperature sensor (WP 0085).
c.
If engine does not warm up, replace engine coolant temperature
thermostat(s) (WP 0082).
STEP 3.
Verify the problem has been resolved.
MALFUNCTION
Electrical Connections Faulty.
CORRECTIVE ACTION
STEP 1.
On EMCP set ENGINE CONTROL switch to OFF/RESET. Set Battery
Disconnect Switch to OFF. Set DEAD CRANK SWITCH to OFF.
STEP 2.
Check for correct installation of ECM to EMCP harness connector ENG-P1 to
ECM J1 and of engine harness connector ENG-P2 to ECM J2 (cables plugged in
to ECM) (WP 0090 and FO-2, sheet 1 and sheet 2).
STEP 3.
Check engine harness timing sensor connectors ENG-P4 and ENG-P5 and unit
injector connector ENG-P300/J300. Plug connectors in securely (WP 0090).
STEP 4.
Verify connections between LSM A4 pins A4-19 and A4-20 and the ECM input
pins ENG-P1-5 and P1-66 (FO-4, sheet 2 and FO-3, sheets 1 and 2). Look
specifically for intermittent connections. Repair or replace wiring, as required
STEP 5.
Verify the problem is resolved.
MALFUNCTION
Fuel Supply Problem.
CORRECTIVE ACTION
STEP 1.
Perform Cylinder Cutout test to check for any non-operable unit injectors. If
necessary, replace faulty injectors (WP 0114).
STEP 2.
Check for a fuel supply problem and verify fuel pressure (WP 0013, SYMPTOM
13).
STEP 3.
Verify the problem is resolved.
0011-36
