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Page Title:
CODE 21 THROTTLE POSITION SENSOR (TPS) SIGNAL VOLTAGE HIGH (CONT). |
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 TM 9-2320-364-20-1
A4 CODE 21 THROTTLE POSITION SENSOR (TPS) SIGNAL VOLTAGE HIGH (CONT).
4.
KNOWN INFO
TEST OPTIONS
WARNING
READ WARNING
DDR test.
CHECK ENGINE light (CEL)
on Page 2-223
comes ON and stays ON.
Wires 952 and 419 not open.
REASON FOR QUESTION
Are the TPS counts 20 to 30
TPS is faulty if counts are not 20
at idle and 200 to 235 counts
to 30 at idle and 200 to 235 at
POSSIBLE PROBLEMS
full throttle.
at full throttle?
TPS is faulty.
TPS terminals and/or connector
are faulty.
Wires 417 and/or 916 shorted.
Vehicle harness connector
and/or power harness
connector shorted.
Replace TPS
DDEC ECM terminals faulty.
(Para 7-58).
NO
DDEC ECM faulty.
Verify repair, go to
Step 9 of this Fault.
YES
5.
KNOWN INFO
TEST OPTIONS
CHECK ENGINE light (CEL)
Visual inspection.
Are TPS terminals and
comes ON and stays ON.
connector free from damage?
Wires 952 and 419 not open.
REASON FOR QUESTION
Damage to terminals can affect
POSSIBLE PROBLEMS
signal to TPS.
TPS is faulty.
TPS terminals and/or connector
are faulty.
Wires 417 and/or 916 shorted.
Vehicle harness connector
and/or power harness
connector shorted.
Repair TPS terminals
DDEC ECM terminals faulty.
(Para 7-101).
DDEC ECM faulty.
NO
Verify repair, go to
Step 9 of this Fault.
YES
Replace TPS
(Para 7-58).
Verify repair, go to
Step 9 of this Fault.
2-222
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