TM 5-3805-281-24-1
Sub-System Diagnostics
MONITOR CONTROLLER AND DISPLAY CIRCUIT SPECIFICATIONS
Fuel Sending Unit--Specification
Field Output--Specification
Voltage............................................................. 10 1.5 Volts Or Less
Resistance .................................................. 10 +0 -4 Ohms With Fuel
Gauge Reading Full
Alternator Charge Light Goes Out At Alternator Excitation Field
Fuel Sending Unit--Specification
Output--Specification
Resistance ......................................... 38 5 Ohms With Fuel Gauge
Voltage............................................................ 13 1.5 Volts Or More
Reading Half
Air Filter Restriction Switch Closes At--Specification
Fuel Sending Unit--Specification
Vacuum............................................................... 6.23 kPa 1.25 kPa
Vacuum................................................................... 1.84 0.36 in. Hg
Resistance ................................................ 90 +10 -0 Ohms With Fuel
Vacuum.............................................................................. 25 2.3 in.
Gauge Reading Empty
Fuel Level Switch Closes At--Specification
Coolant Temperature Gauge Needle Position At--Specification
9015
15
Temperature ............................................. 60C (140F) Beginning Of
Level .................................................... 112 mm (4.4 in.) Fuel In Tank
44
Or Less (30.3--37.9 L) (8--10
Green Area (Cold)
Temperature .................................................... 104C (219F) End Of
gal)
Green Area (Cold)
Temperature ........................................... 110C (230F) Beginning Of
Engine Oil Pressure Switch Opens At--Specification
Red Area (Hot)
Temperature ............................................. 135C (275F) End Of Red
Pressure............................................ Above 172 kPa (1.72 bar) (24.9
Area (Hot)
psi)
Engine Coolant Temperature Sensor--Specification
Engine Oil Pressure Switch Closes At--Specification
Resistance ................................................. 63 Ohms At 60C
(140F)
Pressure............................................ Below 103 kPa (1.03 bar) (14.9
Resistance ............................................... 14 Ohms At 104C
(219F)
psi)
Resistance ............................................... 15 Ohms At 110C
(230F)
Resistance ................................................. 3 Ohms At 135C
(275F)
Engine Coolant Temperature Switch Closes On--Specification
Increasing Temperature.......................... 110C 3C (230F 37F)
Charge Air Temperature Switch Closes On--Specification
Maximum
Increasing Temperature.................... at 94C 2.8C (201F 37F)
maximum
Engine Coolant Temperature Switch Opens On--Specification
Decreasing Temperature ................................................ 95C (203F)
Minimum
Alternator Charge Light Illuminates At Alternator Excitation
Continued on next page
CED,OUOE012,122
1912MAR991/2
