TM-9-2320-366-20-1

M1083 SERIES, 5 TON, 6x6, MEDIUM TACTICAL VEHICLES (MTV)

TECHNICAL MANUAL; MAINTENANCE INSTRUCTIONS; UNIT MAINTENANCE; VOLUME NO. 1 OF 5

FEBRUARY 2006

CHANGE 3

TM-9-2320-366-20-1 - Page 564 of 1824

TM 9-2320-366-20-1

e14. TACHOMETER DOES NOT OPERATE OR IS INACCURATE

INITIAL SETUP

Equipment Conditions

Engine shut down (TM 9-2320-366-10-1).

Tools and Special Tools

Tool Kit, Genl Mech (Item 46, Appendix C)

STE/ICE-R (Item 41, Appendix C)

Multimeter, Digital (Item 22, Appendix C)

Wrench, Torque, 0-75 lb-in. (Item 90, Appendix B)

Materials/Parts

Wire, Elect, 50 ft (Item 71, Appendix D)

Personnel Required

(2)

References

TM 9-4910-571-12&P

NOTE

If tachometer does not illuminate, perform

Electrical System Troubleshooting e21.

Tachometer Does Not Illuminate prior to

beginning this task.

1.

TEST OPTIONS

REASON FOR QUESTION

YES

NO

Replace engine speed sensor

(para 7-46).

CAUTION

Read CAUTION

on following page.

If resistance is greater than

1440 ohms, engine speed

sensor is faulty.

Resistance Test or

STE/ICE-R Test #91

Is less than 1440 ohms

resistance present from

engine speed sensor

connector socket 1 to

pin 2?

KNOWN INFO

Faulty engine speed sensor.

Faulty dashboard cable

assembly.

Faulty auxiliary panel cable

assembly.

Faulty engine control cable

assembly.

Faulty tachometer.

POSSIBLE PROBLEMS

Tachometer illuminates.

VOLTS gage OK.

START

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