TM-9-2320-272-23-1

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 1 OF 5

SEPTEMBER 2012

TM-9-2320-272-23-1 - Page 898 of 1313

FIELD MAINTENANCE

TEMPERATURE GAUGE INOPERATIVE (COOLANT)

INITIAL SETUP:

Tools and Special Tools

Tool Kit, General Mechanic's: Automotive

(Volume 5, WP

0826, Table 1, Item 56)

Multimeter

(Volume 5, WP

0826, Table 1, Item 34)

Test Set, Electronic Systems

(Volume 5, WP

0826, Table 1, Item 51)

Personnel Required

(2)

References

Point to Point Schematics

References (cont.)

Volume 2, WP

0310

Volume 2, WP

0312

Volume 2, WP

0334

Volume 3, WP

0351

Volume 3, WP

0352

Equipment Condition

Vehicle parked and engine shut down.

(TM

9-2320-272-10)

TROUBLESHOOTING PROCEDURE

TEMPERATURE GAUGE INOPERATIVE (COOLANT)

NOTE

Conduct these malfunction tests if coolant temperature gauge is inoperative. This procedure

will check for inoperative coolant temperature sending unit, faulty circuit 33 wire, defective

gauge or instrument cluster wiring assembly.

TM 9-2320-272-23-1

0106

0106-1