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)
11-13
Check for Outside
DDEC Battery +
Turn Ignition off.
All readings
Go to 11-9.
Remove ECM 5-pin power
less then 4.0 volts.
connector.
Remove ECM vehicle harness.
Either reading
Outside power is spliced into
Turn ignition on.
greater than or
either ckt#952 or ckt#916.
Read voltage A3(916) to a
equal to 4.0 volts.
Remove splice. Then go to
good ground.
11-30.
Read voltage C3(952) to a
good ground.
11-30
Verify Repairs
Turn ignition off.
(No codes).
Repairs are complete.
Reconnect all connectors.
Turn ignition on.
Code 187/4 (and
All system diagnostics are
Clear codes.
any other codes).
complete. Please review this
Note status of "Check Engine"
section from the first step to
light.
find the error.
If "Check Engine" light does not
stay on, start engine and run until
Any other codes
Go to START-1, pg 3-345.41,
"Check Engine" light comes on
except Code 187/4.
to service other codes.
or 1 minute.
Stop engine.
Read all codes.
Change 3 3-345.187
