TM-9-2320-272-10

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

TECHNICAL MANUAL; OPERATOR'S MANUAL

SEPTEMBER 2004

CHANGE 2

TM-9-2320-272-10 - Page 371 of 481

TM 9-2320-272-10

3-22

CTIS STATUS INDICATION

SYSTEM MALFUNCTION

ACTION REQUIRED

Table 3-2. CTIS Indications (Cont’d).

7. SYSTEM REPEATEDLY RESUMES CYCLING 30 SECONDS AFTER MODE LIGHT

STOPS FLASHING.

Undetermined.

Notify unit maintenance.

8. SYSTEM SHUTS OFF DURING INFLATION, SINGLE MODE LIGHT CONTINUES

TO FLASH.

Undetermined.

Notify unit maintenance.

9. SYSTEM FAILS TO DEFLATE, PARTIALLY DEFLATES, OR TIRE PRESSURES ARE

IMBALANCED.

Undetermined.

Disable CTIS (para. 3-16) and notify unit maintenance.

10. SELECTOR PANEL LIGHTS WORK, SYSTEM FAILS TO INFLATE OR DEFLATE.

Undetermined.

Notify unit maintenance.

11. LOSS OF OVERSPEED WARNING LIGHT AND/OR OVERSPEED PRESSURE

CHANGE.

Undetermined.

Disable CTIS (para. 3-16), maintain vehicle speed within limits of

tire pressure setting (table 1-10), and notify unit maintenance.

12. SYSTEM IS OVERINFLATING THE TIRES.

Undetermined.

Disable CTIS (para. 3-16), readjust tire pressure for road conditions

(table 1-10), and notify unit maintenance.

13. SLOW AIR RECOVERY OR OCCASIONAL LOW AIR WARNING DURING

BRAKE OPERATION.

Step 1. Minor leak in air system.

Troubleshoot air system (para. 3-3), and notify unit maintenance.

Step 2. Major leak in air system.

Disable CTIS (para. 3-16) and notify unit maintenance.