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 1276 of 1313

FIELD MAINTENANCE

SYSTEM OVER-INFLATES TIRES

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.)

WP

0006

Volume 2, WP

0322

Volume 5, WP

0812

Volume 5, WP

0813

Equipment Condition

Vehicle parked and engine shut down.

(TM

9-2320-272-10)

TROUBLESHOOTING PROCEDURE

SYSTEM OVER-INFLATES TIRES

NOTE

•

Conduct these malfunction tests if the system over-inflates tires. This procedure will

check for a faulty CTIS wiring harness, Electronic Control Unit (ECU), and pressure

transducer.

•

The ECU is programmed in conjunction with vehicle air compressor output. This

procedure requires air source supplied by vehicle for accurate diagnosis.

TM 9-2320-272-23-1

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