STEP/SEQUENCE
RESULT
WHAT TO DO NEXT
TM 9-2320-363-20-1
Section 4
TROUBLESHOOTING CHARTS
E. FLASH CODE: 11
J1587 CODE:
P187 4 POWER TAKE OFF INPUT FAILED LOW (VOLTAGE LOW)
(ALSO CALLED VARIABLE SPEED GOVERNOR · VSG)
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.
NOTE: REMOVE GROUND WIRE IF FITTED FROM CIRCUIT 510 BEFORE PERFORMING THESE CHECKS!
11-1
Multiple Code Check
Were there any other active codes
No other
Go to 11-2.
besides 187/4?
active codes.
Yes, any or all
Go to VEH5V-1, page 3-345
of the following active
419.
codes: 187/3, 91/3 or 4
Yes - but none
Go to 11-2.
of the above.
11-2
Sensor Check
Turn ignition off.
Code 187/3 (and/or -.
Go to 11-6.
Disconnect PTOSA connector
other codes.
Install a jumper wire between
sockets B and C of the PTO/VSG
Code 187/4 (and any-
Go to 11-3.
harness connector.
other codes).
Turn ignition on
Read active codes.
NOTE: If flash CODE 11, or 187/4 is present and no PTO-VSG controls are used (fit to vehicle) contact DDC
with engine serial number to determine if a calibration modification is required.
11-3
Check PTOSA
Adjustment
Remove jumper and reconnect
Getting 48 to
Go to 11-5.
PTOSA.
968 counts.
Hook-up DDR to the DDL
connector and select PTO
Not getting the
Go to 11-4.
COUNTS.
above readings.
Read counts.
11-4
Attempt PTOSA
Adjustment
If a variable PTOSA is installed
Corrected
Go to 11-30.
adjust stops on PTOSA.
problem so that Throttle
If fixed resistors are Installed
Counts is now correct
replace with new resistors.
Could not correct the
Go to 11-5.
problem.
Change 3 3-345.181
