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TM 9-2320-364-20-2
2-878
7. CODE 23: SHIFT SELECTOR (CONT).
“CHECK TRANS” light ON.
Restricted gear shifts.
Torque converter lockup clutch
unlocked.
Transmission does not shift
properly or stays in N
(Neutral).
Wire 210A is OK.
Wires 230/234 OK.
EBC/ATEC wire harness OK.
Short/open in control box wire
harness.
Shift selector faulty.
Transmission ECU faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Continuity test.
STE/ICE-R #91.
If shift controller wiring through
electrical control box wire
harness is faulty, electrical
power and ground circuits
cannot be completed to
ECB/ATEC wire harness at
ECU. ATEC will register a
code 23 fault.
YES
NO
Repair wire(s) (see
schematic Fig 2-21) or
notify DS
Maintenance.
Verify repair, go to
Step 7 of this Fault.
5.
Is there continuity on all wires
between connector MC50 and
relays R8, R9, R10 and R11?
Replace shift selector
(Para 8-2). Verify
repair, go to Step 7 of
this Fault.
WARNING
Read WARNING
on Page 2-879
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