Section 4
TM 9-2320463-20-1
TROUBLESHOOTING
CHARTS
E. CODE 22- THROTTLE POSITION SENSOR (TPS) SIGNAL VOLTAGE LOW (Cont’d.)
22-5
Check TPS
Connectors
l inspect terminals at the TPS
connectors (sensor side and
harness side) for damage,
corrosion, and unseated pins or
sockets.
22-6
Check for + 5 Volts
. Remove jumper.
l Turn ignitionon.
l Read voltage on TPS harness
connector. socket C to socket A.
22-7
Check for Short
l Turn ignition off.
l Disconnect the vehicle harness
connector at ECM.
l Read resistance between sockets
A and B on the TPS harness
connector.
l Also read resistance between
socket B and a good ground.
22-8
Check for Signal Open
l Install a jumper wire between
sockets A and B of the TPS
harness connector.
l Read resistance between sockets
D2 and C3 on the vehicle harness
connector.
RESULT
I
WHAT TO DO NEXT
Terminals and
Replace TPS, page 4-248.
connectors are okay.
Then go to 22-30.
Problem found.
Repair terminals/connectors,
Page 3-2. Then go to 22-30.
Between
,Go
to 22-7.
4 to 6 volts.
Less than
Go
to 22-10.
4 volts.
Greater than
Go
to 22-12.
6 volts.
Less than or
Signal line (ckt ##417)is shorted
equal to 10,000 ohms
to the return line (ckt #952) or
on either reading.
battery ground. Contact Direct
support.
Greater than
Go
to 22-8.
10,000 ohms or open
on both readings.
Less than
or equal to 5 ohms.
Greater than
5 ohms or open.
Go to 22-9
Signal line (ckt #417) is open,
and/or signal return (ckt #952)
is open. Repair open. If no open
was found, check ECM terminals
A3. D2, C3 and TPS pins. Then
go to 22-30.
3-231
