STEP/SEQUENCE
RESULT
WHAT TO DO NEXT
TM 9-2320-363-20-1
Section 4
TROUBLESHOOTING CHARTS
D. CHART -11 - VARIABLE SPEED GOVERNOR (VSG OR PTO) INOPERATIVE (Cont'd)
C 11-11
Check for Short
Between Signal and
Ground
Remove jumper wire.
Both readings
Go to C11-12.
Read resistance between sockets
are greater than
D (#510) and C3 (#952) on vehicle
10,000 ohms or open.
harness connector.
Also read resistance between
Either reading is
Signal line (ckt less #525 or
socket D1 (#510) and a good
less than equal
#510) or Neutral interlock
ground.
to 10,000 ohms.
switch is shorted to ground (either
ckt #952 or chassis ground).
Repair short. Then go to C11-30
or check relay if supplied.
C 11-12
Check for Short
Between +5 Bolt
Line and Ground
Disconnect speed adjust
Both readings
Go to C11-13.
sensor.
are greater than
Read resistance between sockets
10,000 ohms or open.
A3 (#916) and C3 (#952) on
vehicle harness connector.
Also read resistance between
Either reading is
The +5 Volt line (ckt #916) is
socket A3 (#916) and a good
less than or equal
shorted to ground (either ckt
ground.
to 10,000 ohms.
#952 or chassis ground). Repair
short. Then to C11-30.
C 11-13
Check PTOSA
Connectors
Inspect terminals at PTOSA
Terminals and
Replace speed adjustment
connectors (sensor side and
connectors are okay.
sensor. Then go to C11-30.
harness side) for damaged; bent,
corroded, and unseated pins or
Problem found.
Repair terminals/connectors.
sockets.
Then go to C11-30.
Change 3 3-345.123
