STEP/SEQUENCE
RESULT
WHAT TO DO NEXT
TM 9-2320-363-20-1
Section 4
TROUBLESHOOTING CHARTS
D. CHART 24 - ALTERNATE TORQUE CURVE SWITCH INOPERATIVE
NOTE - This chart is only to be used if:
1) All basic mechanical checks and physical inspections have been performed with no problem found,
and
2) Diagnosis of DDEC-III was started at step Start-1, pg 3-345.41 and you have now been referred here.
C 24-1 Check Configuration
Turn ignition on.
Plug in DDR.
Select ECM In/out configuration.
Not configured for ALT
Determine which cavity/pin
torque curve.
Reconfigure ECM to enable
assigned to act (2nd) torque
feature.
curve.
Data obtained.
Go to C 24-2.
C 24-2
Check Switch Status
Turn on 2nd torque curve
Switch reads "on".
Problem is no longer present.
switch.
Go to C 1-2 for intermittent
problems. (Also ensure
calibration is set for 2nd
torque curve).
Observe status on DDR
Switch reads "off'.
The OEM switch is bad, or a
(Switch/Light Status).
poor ground exists. Replace/
repair then go to C 24-30.
C 24-30
Verify Repairs
Start engine.
Switch reads "on".
Repairs are complete go to
Switch to 2nd torque curve.
START-1 to service any
codes.
Observe switch/light status
Switch reads "off'.
Repairs are complete review
status on DDR.
this section to find the error.
Change 3 3-345.167
