TM-9-2815-220-24
AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL FOR AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines
TM-9-2815-220-24 - Page 164 of 1563
TM 9-2815-220-24
INTAKE MANIFOLD HEATER ABNORMAL OPERATION
0023 00
MALFUNCTION 1:
(Continued)
Manifold heater inoperative.
Manifold heater Voltage Checks
NOTE
Disconnect purge pump fuel hose quick-disconnect coupling at engine
before performing test.
PROCEDURE
OBSERVATION
ANALYSIS
24 volts at manifold heater
switch, both connectors.
Proper voltage through
manifold heater switch.
No voltage to switch.
Defective circuit.
See
appropriate vehicle technical
manual.
No voltage from switch.
Defective switch.
24 volts at engine bulkhead
connector.
Proper voltage.
No voltage to bulkhead
connector.
Defective circuit between
switch and connector.
See
appropriate vehicle technical
manual.
Check electrical circuit
voltages (master switch and
manifold heater switch
"ON").
24 volts at solenoid valve(s)
supply and return wire
connector.
Proper voltage to solenoid
valves.
No voltage at solenoid valves.
Defective circuit between
connector and valves.
See
appropriate vehicle technical
manual.
24 volts at ignition unit
connector.
Proper voltage supply to
ignition unit.
No voltage at ignition unit.
Defective circuit to ignition
unit.
See appropriate vehicle
technical manual.
WP 0023 00-2
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