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Page Title: CHART - 10 - VARIABLE SPEED GOVERNOR (VSG OR CRANE HIGH IDLE) INOPERATIVE (Cont'd)
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TM 9-2320-364-20-1
Section IV. TROUBLESHOOTING CHARTS (Cont.)
D. CHART - 10 - VARIABLE SPEED GOVERNOR (VSG OR CRANE HIGH IDLE) INOPERATIVE (Cont'd)
-
STEP/SEQUENCE
RESULT
WHAT TO DO NEXT
C 10-8
Check ECM
Connectors
Turn ignition off.
Terminals and
Replace ECM (para 7-57).
Disconnect vehicle harness
connectors are okay.
Then go to C 10-30.
connector at ECM.
Check terminals at vehicle
harness connector (both ECM
Problem found.
Repair terminals/connectors
and harness side) for damage;
(para 7-101). Then go to
bent, corroded, and unseated
C 10-30.
pins or sockets.
C 10-9
Check for Open
Turn ignition off.
Greater than
Signal line (ckt #525 or #510)
Make sure vehicle is in neutral.
5 ohms or open.
ground line (ckt #952) or the
Disconnect vehicle harness
Neutral start circuit
connector at ECM.
has an open. Repair open.
Also disconnect vernier control
Then go to C 10-30.
connector (para 7-95).
Install a jumper wire between pins
Less than or
Go to C 10-10.
A and B of the vernier control
equal to 5 ohms.
connector.
Read resistance between sockets
D1 (#510) and C3 (#952) on
vehicle harness connector.
C 10-10
Check for +5 Volt
Line Open
Move jumper so that it is now
Greater than
The +5 volt line (ckt #916)
between pins C and A of vernier
5 ohms or open.
is open. Repair open. Then go
control connector.
to C 10-30.
Read resistance between sockets
A3 (#916) and C3 (#952) on
Less than or
Go to C 10-11.
vehicle harness connector.
equal to 5 ohms.
2-611

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