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 186 of 704
TB 9-3950-253-13&P
Change 1
0019-6
0019
ELECTRICAL SYSTEM – CONTINUED
5. NO STOWAGE FUNCTION (ERROR CODE 7).
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 wires from positions 1, 2, 3, and 4 on P7 and position 5 on P6 in Space 4000 ST
box.
Step 3.
Set battery disconnect switch and ignition switch to ON position.
a.
If error code is still displayed, replace Space 4000 ST box (WP 0029).
b.
If error code is not displayed, set ignition switch and battery disconnect switch to OFF posi-
tion, reconnect pins 1, 2, 3, and 4 to P7 and pin 5 to P6 in stowage Space 4000 ST box and
proceed to Step 4.
Step 4.
Disconnect wires from positions 1, 2, 3, 4, and 7 on P1 in relay box.
Step 5.
Set battery disconnect switch and ignition switch to ON position.
a.
If error code is still displayed, set ignition switch and battery disconnect switch to OFF posi-
tion, and replace CAN bus harness between Space 4000 ST box and relay box (WP 0029).
b.
If error code is not displayed, set ignition switch and battery disconnect switch to OFF posi-
tion, reconnect pins 1, 2, 3, 4, and 7 to P1 in relay box and proceed to Step 6.
Step 6.
Disconnect wires from positions 1, 2, 3, and 4 on P2 in relay box.
Step 7.
Set battery disconnect switch and ignition switch to ON position.
a.
If error code is still displayed, set ignition switch and battery disconnect switch to OFF posi-
tion, and replace relay box (WP 0029).
b.
If error code is not displayed, set ignition switch and battery disconnect switch to OFF posi-
tion, reconnect pins 1, 2, 3, and 4 to P2 in relay box and proceed to Step 8.
Step 8.
Disconnect wires from positions 1, 2, 3, and 4 on P1 in additional MUX box.
Step 9.
Set battery disconnect switch and ignition switch to ON position.
a.
If error code is still displayed, set ignition switch and battery disconnect switch to OFF posi-
tion, and replace CAN bus harness between relay box and additional MUX box (WP 0029).
b.
If error code is not displayed, set ignition switch and battery disconnect switch to OFF posi-
tion, reconnect pins 1, 2, 3, and 4 to P1 in additional MUX box and proceed to Step 10.
Step 10.
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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