TM 5-3895-385-23-1
FIELD MAINTENANCE
BITUMINOUS MATERIAL PAVING MACHINE (BMPM)
SPN#729, FMI#3 ― HIGH VOLTAGE AT INTAKE AIR HEATER SIGNAL CIRCUIT
INITIAL SETUP:
Test Equipment
References -- Continued
Multimeter (WP 0440, Vol 3, Item 37)
WP 0388, Vol 2
Personnel Required
WP 0392, Vol 2
91L
WP 0443, Vol 3
References
WP 0448, Vol 3
WP 0277, Vol 2
WP 0451, Vol 3
WP 0332, Vol 2
Equipment Conditions
WP 0357, Vol 2
Engine off (TM 5-3895-385-10)
Engine hood assembly removed (WP 0433, Vol 2)
TROUBLESHOOTING PROCEDURE
CAUTION
All active fault codes must be investigated prior to replacing the engine Electronic Control Module
(ECM). Failure to comply may cause damage to equipment.
NOTE
Some sensors share harness wiring. Malfunctions in certain sensors, or in the engine ECM, may
cause false errors to display because of this shared wiring. For this malfunction (SPN#729,
FMI#3), harness wiring is shared by the intake manifold pressure/temperature sensor, the
camshaft position sensor, the water-in-fuel sensor, and the rail fuel pressure sensor.
Table 1. SPN#729, FMI#3 ― High Voltage at Intake Air Heater Signal Circuit.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. Intake air heater relay and
1. Remove covers from intake air
electrical connections
heater relays (WP 0392, Vol 2).
damaged.
2. Inspect wiring and intake air
1. If damaged, replace relay (WP
heater relay connections for
0392, Vol 2).
damage (WP 0392, Vol 2).
2. If not damaged, proceed to next
malfunction.