TM 5-3895-385-23-1
FIELD MAINTENANCE
BITUMINOUS MATERIAL PAVING MACHINE (BMPM)
SPN#729, FMI#4 ― LOW 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.
Table 1. SPN#729, FMI#4 ― Low Voltage at Intake Air Heater Signal Circuit.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. Intake air heater relay or
1. Disconnect engine interface
electrical connections
wiring harness connector W16
damaged.
J4 from intake air heater wiring
harness connector W17 J1 (WP
0451, Vol 3, Figure 35).
2. Disconnect intake air heater
wiring from intake air heater
relays (WP 0392, Vol 2).
3. Inspect intake air heater relay
1. If damaged, replace intake air
and for damage.
heater relay (WP 0392, Vol 2).
2. If not damaged, proceed to next
test.
4. Inspect engine interface wiring
1. If damaged, replace engine
harness connector W16 J4 for
interface wiring harness (WP
damage.
0388, Vol 2).