Dodge ram truck 3500 1996 Service Manual page 1004

9 - 1 4 ENGINE — — - — — B R
D I A G N O S I S A N D T E S T I N G (Continued)
SERVICE DIAGNOSIS—DIESEL—PERFORMANCE
CONDITION
POSSIBLE CAUSES
CORRECTION
ENGINE WILL NOT CRANK
OR CRANKS SLOWLY
1. Starting motor operating, but
not cranking the engine.
2. Crankshaft rotation restricted.
3. Starting circuit connections
loose or corroded.
4. Neutral safety switch or starter
relay inoperative.
5. Battery charge low.
6. No voltage to starter solenoid.
7. Solenoid or starter motor
inoperative.
1. Remove the starter motor. Check for
broken flywheel teeth or a broken
starting motor spring.
2. Rotate the engine to check for rotational
resistance.
3. Clean and tighten connections.
4. Check starter relay supply voltage and
proper operation of neutral safety switch
if equipped. Replace defective parts.
5. Check battery voltage. Replace battery
if a charge cannot be held.
6. Check voltage to solenoid. If necessary,
replace the solenoid.
7. Replace starter motor.
ENGINE CRANKS, BUT
WILL NOT S T A R T -
NO SMOKE FROM
EXHAUST
1. No fuel in supply tank.
2. Electrical fuel shutdown
solenoid not operating.
3. Air intake or exhaust plugged.
4. Fuel filter plugged.
5. Excessive fuel inlet restriction.
6. Injection pump not getting fuel
or fuel is aerated.
7. Inoperative fuel transfer (Lift)
pump.
8. One or more injectors worn or
not operating properly.
9. Worn or inoperative injection
pump.
10. Internal pump timing incorrect.
11. Camshaft out of time.
1. Fill fuel supply.
2. Check for loose wires and verify that the
fuel shutdown solenoid and fuel
shutdown solenoid relay are functioning.
3. Remove the obstruction.
4. Drain fuel/water separator and replace
fuel filter.
5. Check fuel inlet restriction. Correct
cause.
6. Check fuel flow/bleed fuel system.
7. Check fuel line for restrictions and fue
pressure.
8. Check/replace bad or improperly
operating injectors.
9. Visually check delivery with externally
connected injector to one of the pump
outlets. Repair or replace the pump if
fuel is not being delivered.
10. Time the pump (refer to Group 14, Fuel
System).
11. Check/correct gear train timing
alignment.
J9509-145