TM 5-3895-385-23-1
FIELD MAINTENANCE
BITUMINOUS MATERIAL PAVING MACHINE (BMPM)
SPN#110, FMI#4 ― ENGINE COOLANT TEMPERATURE SENSOR VOLTAGE BELOW NORMAL
INITIAL SETUP:
Test Equipment
References -- Continued
Multimeter (WP 0440, Vol 3, Item 37)
WP 0334, Vol 2
Personnel Required
WP 0357, Vol 2
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 problems that affect shared lines can
also produce several malfunction codes. For this malfunction (SPN#110, FMI#4), the ECM
harness Supply and Return lines are shared by the engine coolant temperature sensor, the
barometric pressure sensor, and the engine oil pressure switch.
Table 1. SPN#110, FMI#4 ― Engine Coolant Temperature Sensor Voltage Below Normal.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. Engine coolant temperature
1. Disconnect engine ECM wiring
sensor malfunction.
harness connector W25 C14
from engine coolant temperature
sensor (WP 0451, Vol 3, Figure
45).
2. Inspect engine coolant
1. If damaged, replace sensor
temperature sensor and
(WP 0333, Vol 2).
connector pins for damage.
2. If not damaged, proceed to
next test.