TM 5-3895-385-23-1
FIELD MAINTENANCE
BITUMINOUS MATERIAL PAVING MACHINE (BMPM)
SPN# 105, FMI #4 ― INTAKE MANIFOLD AIR TEMPERATURE SENSOR VOLTAGE BELOW NORMAL
INITIAL SETUP:
References -- Continued
Test Equipment
WP 0334, Vol 2
Multimeter (WP 0440, Vol 3, Item 37)
WP 0357, Vol 2
Personnel Required
91L
WP 0443, Vol 3
References
WP 0451, Vol 3
WP 0277, Vol 2
Equipment Conditions
WP 0332, Vol 2
Engine off (TM 5-3895-385-10)
WP 0333, Vol 2
Engine hood assembly removed (WP 0433, Vol 2)
TROUBLESHOOTING PROCEDURES
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 ECM wiring harness Supply and Return signal lines are shared by more than one ECM
sensor. Problems affecting ECM sensors that share lines can result in display of several
malfunctions (SPN and FMI codes) at the same time. ECM module problems that affect shared
lines can also produce several malfunction codes. For this malfunction (SPN#105, FMI#4), the
ECM harness Supply and Return lines are shared by the intake manifold pressure/temperature
sensor, the camshaft position sensor, the rail fuel pressure sensor, and the water-in-fuel sensor.
Table 1. SPN# 105, FMI#4 -- Intake Manifold Air Temperature Sensor Voltage Below Normal.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. Intake manifold temperature
1. Disconnect engine ECM wiring
sensor malfunction.
harness connector W25 C7 from
manifold pressure/temperature
sensor (WP 0451, Vol 3, Figure
45).
2. Inspect manifold
1. If damaged, replace manifold
pressure/temperature sensor
pressure/temperature sensor
and connector pins for damage
(WP 0333, Vol 2).
(WP 0451, Vol 3, Figure 45).
2. If not damaged, proceed to
next test.