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 190 of 704

TB 9-3950-253-13&P
Change 1
0019-10
0019
ELECTRICAL SYSTEM – CONTINUED
7. NO STOWAGE FUNCTION (ERROR CODE 11, 12, 14 AND 23) – CONTINUED.
Step 14.
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 between additional MUX box and
stowage MUX box (WP 0029).
Step 15.
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 additional MUX box and
stowage MUX box (WP 0029).
Step 16.
Check pin connections 1, 2, 3, 4 and 7 on P1 in relay box.
Secure any loose connections (WP 0029).
Step 17.
Check pin connections 1, 2, 3, and 4 on P7 and 5 on P6 in Space 4000 ST box.
Secure any loose connections (WP 0029).
Step 18.
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 19.
Step 19.
Disconnect wires from positions 1, 2, 3, and 4 on P7 and position 5 on P6 in Space 4000 ST
box.
Step 20.
Disconnect wires from positions 1, 2, 3, 4 and 7 on P1 in relay box.
Step 21.
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 between relay box and Space
4000 ST box (WP 0029).
Step 22.
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 Space
4000 ST box (WP 0029).
Step 23.
Measure resistance of wire 5 in Space 4000ST box to wire 7 in relay box. Resistance should be
<200 Ohms.
a.
If resistance is >200 Ohms, replace CAN bus linking harness between relay box and Space
4000 ST box (WP 0029).
a.
If resistance is <200 Ohms, replace Space 4000 ST box (WP 0029).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
0.


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