TM 9-2320-363-34-1
Troubleshooting Symptom Index (Cont)
Troubleshooting
Malfunction
Procedure
Number
Malfunction
Page
ARCTIC HEATER
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
HEATER WILL NOT START, BLOWER DOES NOT RUN . . . . . . . . . . . . . . .
2-26
BLOWER RUNS WHEN SWITCH IS IN START POSITION, BUT HEATER
WILL NOT IGNITE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-26
BLOWER RUNS WHEN SWITCH IS IN START POSITION AND HEATER
IGNITES, BUT PILOT LAMP WILL NOT LIGHT . . . . . . . . . . . . . . . . . . .
2-27
HEATER STARTS AND RUNS BUT GOES OUT LATER . . . . . . . . . . . . . . . .
2-27
HEATER OVERHEATS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-27
HEAT OUTPUT LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-27
HEATER BURNS ON HIGH HEAT CONTINUOUSLY . . . . . . . . . . . . . . . . . .
2-28
HEATER BURNS ON LOW HEAT CONTINUOUSLY. . . . . . . . . . . . . . . . . . .
2-28
HEATER SMOKES EXCESSIVELY . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-28
BLOWER WILL NOT STOP WHEN HEATER IS SHUT OFF. . . . . . . . . . . . . .
2-28
Table 2-1. Troubleshooting
Malfunction
Test or Inspection
Corrective Action
ENGINE
1. ENGINE FAILS TO CRANK.
Using accessory drive, rotate engine two complete revolutions.
If engine cannot be rotated, internal damage is indicated and
engine must be disassembled to determine damage (page 3-2).
2. ENGINE CRANKS BUT FAILS TO START.
Step 1.
Inspect timing wheel for looseness.
Tighten timing wheel (page 12-41).
Step 2. Inspect timing wheel for chipped or missing teeth.
Replace timing wheel (page 12-41).
Step 3. Check injector drive pulses. With ignition off, remove rocker arm cover
(page 3-71 ). Disconnect return wire 619 or 620 and install 6-volt test light in
place of disconnected wire and ground. Crank engine and observe that
plunger motion coincides with light flashes. Reconnect return wire and repeat
step for remaining cylinders.
l If light does not flash for one or more tests, troubleshoot
DDEC (TM 9-2320-363-20). If light and start of plunger motion
do not coincide, check mechanical timing (page 3-178).
2-5
