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TM 9-2320-364-20-2
2-820
1. CODE 12: LOW OIL LEVEL (CONT).
2.
Fault is in
transmission. Notify
DS Maintenance.
YES
NO
High gear restricted.
“CHECK TRANS” light ON.
“DO NOT SHIFT” light OFF.
Transmission oil level OK.
Transmission internal wire
harness faulty.
Oil level pressure switch faulty.
Cab/transmission wire harness
faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Continuity test.
STE/ICE-R #91.
If continuity is not present,
transmission internal wire
harness or pressure switch
damaged and ATEC ECU will
register a code 12 fault.
WARNING
Is continuity measured
between wires 101 and 122 at
transmission bulkhead
connector, terminals E
and H?
Read WARNING
on Page 2-821
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