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

  TB-9-3950-253-13-P - Page 189 of 704

0019-9
Change 1
TB 9-3950-253-13&P
0019
ELECTRICAL SYSTEM – CONTINUED
7. NO STOWAGE FUNCTION (ERROR CODE 11, 12, 14 AND 23).
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.
Check pin connections 1, 2, 3, and 4 on P2 in relay box.
Secure any loose connections (WP 0029).
Step 3.
Check pin connections 1, 2, 3, and 4 on P1 in additional MUX box.
Secure any loose connections (WP 0029).
Step 4.
If loose connections found, set battery disconnect switch and ignition switch to ON position and
check for error code.
If error code is still displayed, proceed to Step 5.
Step 5.
Disconnect wires from positions 1, 2, 3, and 4 on P2 in relay box.
Step 6.
Disconnect wires from positions 1, 2, 3, and 4 on P1 in additional MUX box.
Step 7.
Install jumper between wires 3 and 4 and measure resistance at other end of harness. Resis-
tance should be <200 Ohms.
If resistance is >200 Ohms, replace CAN bus linking harness relay box and additional MUX box
(WP 0029).
Step 8.
Install jumper between wires 1 and 2 and measure resistance at other end of harness. Resis-
tance should be <200 Ohms.
If resistance is >200 Ohms, replace CAN bus linking harness between relay box and additional
MUX box (WP 0029).
Step 9.
Check pin connections 1, 2, 3, and 4 on P2 in additional MUX box.
Secure any loose connections (WP 0029).
Step 10.
Check pin connections 1, 2, 3, and 4 on P1 in stowage MUX box (control panel).
Secure any loose connections (WP 0029).
Step 11.
If loose connections found, set battery disconnect switch and ignition switch to ON position and
check for error code.
If error code is still displayed, proceed to Step 12.
Step 12.
Disconnect wires from positions 1, 2, 3, and 4 on P1 in stowage MUX box (control panel).
Step 13.
Disconnect wires from positions 1, 2, 3, and 4 on P2 in additional MUX box.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
0.


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