TM 5-3805-280-24-1
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. water
Gage 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
45
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
Level ................................................. 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)
Level ................................................. 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 At--Specification
Maximum
Temperature ................................................................. 100C (212F)
Engine Coolant Temperature Switch Opens On--Specification
Decreasing Temperature ................................................ 95C (203F)
Minimum
Alternator Charge Light Illuminates At Alternator Excitation
Continued on next page
CED,OUOE012,25 1909MAR991/2
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