Section
4
TROUBLESHOOTING
D. CHART
21- THROTTLE
INHIBIT
ALWAYS ON (Cont’d.)
C21-4
Check
TPS
l Replace vehicle harness connector.
l Hook Up DDR to the 12-pin DDL
connector and select Throttle
Sensor display.
l Read throttle counts at both no
throttle and full throttle.
C21-30
Verify
Repairs
. (Note: if the Power Control input is
being used for engine protection,
you will not be able to confirm
repair unless the engine protection
function can be triggered).
l Connect connectors to ECM.
l Start and run engine.
l Select Mode 29 MISC SWITCHES
on DDR for display.
l Recreate conditions under
which
the Power Control input should
be grounded,
and observe
DDR display Iabelled
‘*POWER CTL SW”.
TM 9-2320-363-20-1
CHARTS
RESULT
Getting 20-30
counts at no throttle
and 200-235 counts
at full throttle.
Throttle counts
do not change.
DDR display
reads “OFF”.
DDR display
reads ‘ON”.
WHAT TO DO NEXT
GO to C21-3.
Replace TPS, page 4-248.
Go to C21-30.
All
system diagnostics are
complete. Please review this
section from the first step to find
the error.
Repairs
are complete.
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