TB-9-3950-253-13-P

PALLETIZED LOAD SYSTEM TRUCK, M1075 and M1075A1 (PLS) AND HEAVY EXPANDED MOBILITY TACTICAL TRUCK, M1120, M1120A2, AND M1120A4 (HEMTT), ENHANCED CONTAINER HANDLING UNIT (E-CHU)

TECHNICAL BULLETIN; OPERATOR AND FIELD MAINTENANCE, INSTALLATION INSTRUCTIONS, AND REPAIR PARTS AND SPECIAL TOOLS LIST

JULY 2009

TB-9-3950-253-13-P - Page 200 of 704

TB 9-3950-253-13&P

Change 1

0019-20

0019

ELECTRICAL SYSTEM – CONTINUED

17. NO STOWAGE FUNCTION (ERROR CODE 37).

NOTE

When ignition switch is turned on after battery disconnect switch has been turned off and

back on, error codes 1 and 24 may alternately display for one minute. This error code

indicates that temporary settings were lost while battery disconnect switch was off, and is

consistent with normal operation.

Step 1.

Set ignition switch and battery disconnect switch to OFF position (PLS: TM 9-2320-364-14&P,

HEMTT: TM 9-2320-326-14&P).

Step 2.

Disconnect stowage interface loom from vehicle control box (WP 0029).

Step 3.

Disconnect vehicle wiring harness from stowage interface loom (WP 0029) and connect vehicle

wiring harness to vehicle control box.

Step 4.

Start engine and set MODE switch to AUTO position (PLS: TM 9-2320-364-14&P, HEMTT: TM

9-2320-326-14&P).

Step 5.

Fully extend hook arm and middle frame (PLS: TM 9-2320-364-14&P, HEMTT: TM 9-2320-326-

14&P).

a.

If hook arm and middle frame do not operate correctly, refer to vehicle TM (PLS: TM 9-

2320-364-14&P, HEMTT: TM 9-2320-326-14&P).

b.

If hook arm and middle frame operate correctly, return hook arm to home position and pro-

ceed to Step 6.

Step 6.

Set ignition switch and battery disconnect switch to OFF position.

Step 7.

Disconnect vehicle wiring harness from vehicle control box (WP 0029).

Step 8.

Connect vehicle wiring harness to stowage interface loom, and connect stowage interface loom

to vehicle control box (WP 0029).

Step 9.

Disconnect wire 1467 from pin 2 on P10 in relay box.

Step 10.

Set battery disconnect switch and ignition switch to ON position.

a.

If error code is not displayed, replace stowage interface loom (WP 0029).

b.

If error code is displayed, replace relay box (WP 0029).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

0.