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TM 9-2320-364-20-2
2-880
7. CODE 23: SHIFT SELECTOR (CONT).
“CHECK TRANS” light ON.
“DO NOT SHIFT” light OFF.
Circuit breakers not tripped.
May also have a code 32.
No false code 14.
No short/open circuit in forward
pressure switch circuit inside
transmission.
Cab/transmission wire
harness OK.
Shift selector OK.
Transmission ECU faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Replace ECU.
If CHECK TRANS light stays
on after ECU is replaced,
transmission could be internally
damaged.
YES
NO
Fault corrected. Verify
repair, go to Step 7 of
this Fault.
6.
Does CHECK TRANS light
stay ON longer than five
seconds after ECU is
replaced?
Notify DS
Maintenance.
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