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 1280 of 1313

SYSTEM OVER-INFLATES TIRES - Continued

CAUTION

Turn battery switch to OFF position before disconnecting or connecting ECU wiring

harness. Failure to do so may result in damage to ECU.

c.

Turn battery switch to OFF position.

d.

Disconnect CTIS wiring harness cannon plug at ECU.

e.

Disconnect electrical lead at pressure transducer.

f.

Set multimeter to measure resistance.

g.

Connect multimeter red lead to pressure transducer.

h.

Connect multimeter black lead to pressure transducer lead at ECU cannon plug.

i.

Meter reading should be less than 200 ohms.

CONDITION/INDICATION

IS THERE CONTINUITY BETWEEN PRESSURE TRANSDUCER AND ECU CANNON PLUG?

DECISION

YES - Go to Step (3).

NO - Replace faulty CTIS wiring harness (Volume 2, WP

0322). Go to Step (5) to verify problem is solved.

TM 9-2320-272-23-1

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