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TM 9-2320-360-20-3
Section 4
TROUBLESHOOTING CHARTS
E. VEH5V - VEHICLE HARNESS +5 VOLTS SUPPLY (CONT’D)
STEP/SEQUENCE
VEH5V-4
Check for +5 Volt
Short Ground
l
Remove jumper wire.
Both readings are
l
Disconnect vernier control
greater than 10,000
(para 7-76).
ohms or open.
l
Read resistance between pins A
and C of the TPS connector.
l
Also read resistance between pin
C or the TPS connector and
a good ground.
Either reading is
less than or equal
to 10,000 ohms.
VEH5V-5 (Deleted)
VEH5V-6
+5 Volts Check
Using the Vernier
Control
l
Turn ignition on.
l
Read voltage on the vernier
control connector, socket C
(red lead) to socket A
(black lead).
RESULT
Less than
4.7 volts.
Greater than
or equal to 4.7 volts.
WHAT TO DO NEXT
Go to VEH5V-10.
Go to VEH5V-6.
The engine +5 volt line (ckt #916)
is shorted to either the sensor
return line (ckt #952) or to
chassis ground. Repair short.
Then go to VEH5V-30.
Go to VEH5V-12.
H-249
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