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TM 9-2320-364-20-2
2-852
5. CODE 21: THROTTLE SENSOR INOPERATIVE (CONT).
2.
Repair wire 908 (see
schematic Fig 2-19) or
notify DS
Maintenance.
Verify repair, go to
Step 6 of this fault.
YES
NO
“CHECK TRANS” light ON.
“DO NOT SHIFT” light OFF.
Transmission shifts delayed or
hard.
Throttle position sensor OK.
Wire 908 faulty.
Wire(s) 104, 106A and 124
faulty.
DDEC ECM faulty.
Throttle position control faulty.
Transmission ECU faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Continuity test.
STE/ICE-R #91.
If no signal count to throttle
position control module M4 from
DDEC, ATEC ECU will register
a code 21 fault.
WARNING
Is there continuity
on wire 908 between vehicle
harness connector MC18,
terminal J3 and Throttle
Position Control (TPC)
module?
Read WARNING
on Page 2-853
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