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Page Title:
CODE 23 FUEL TEMPERATURE SENSOR (FTS) SIGNAL VOLTAGE HIGH (CONT). |
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 TM 9-2320-364-20-1
A4 CODE 23 FUEL TEMPERATURE SENSOR (FTS) SIGNAL VOLTAGE HIGH (CONT).
2.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
Resistance test.
CHECK ENGINE light (CEL)
on Page 2-247
STE/ICE-R #92.
comes ON and stays ON.
Are there
more than
REASON FOR QUESTION
POSSIBLE PROBLEMS
10,000 ohms or an open
Resistance less than or equal to
circuit measured between
Wires 472, 416 and/or 452
10,000 ohms at engine harness
wires 472 and 416 at engine
shorted.
connector indicates signal line
harness connector, terminals
FTS connector faulty.
wire 472 is shorted to engine
R3 and W1?
FTS faulty.
wire 416 (+5 volt line) and/or
Wires 472 and/or 452 open.
return line wire 452.
Engine harness connector
faulty.
DDEC ECM faulty.
Repair wires 472,
416, and/or 452 (see
schematic Fig 2-2)
NO
or notify DS
Maintenance.
Verify repair, go to
Step 6 of this Fault.
YES
3.
KNOWN INFO
TEST OPTIONS
WARNING
CHECK ENGINE light (CEL)
Read WARNING
Visual inspection.
on Page 2-247
comes ON and stays ON.
Wires 472, 416 and 452
REASON FOR QUESTION
not shorted.
Are FTS terminals and
POSSIBLE PROBLEMS
Damage to connectors can affect
connectors free from
signal to FTS.
damage?
FTS connector faulty.
FTS faulty.
Wires 472 and/or 452 open.
Engine harness connector
faulty.
DDEC ECM faulty.
Repair FTS connector
(Para 7-101).
NO
Verify repair, go to
Step 6 of this Fault.
YES
Replace FTS
(Para 7-62).
Verify repair, go to
Step 6 of this Fault.
2-246
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