Section 4
TM 9-2320-363-20-1
TROUBLESHOOTING
CHARTS
E. CODE 22-
THROTTLE
POSITION
SENSOR
(TPS)
SIGNAL
VOLTAGE
LOW (Contd.)
22-9
Check
ECM
Connectors
l Check terminals atthe ECM vehicle
harness connector (both the ECM
and harness side) for damage;
bent, corroded, and unseated
pins or sockets.
22-10 Check for Short
l Turn ignition off
l Disconnect the vehicle harness
connector at the ECM.
l Read resistance between sockets
A and C on the TPS harness
connector.
22-1 1 Check
Check for Open
+ 5 Volt Line
l Installa jumper wire between
sockets A and C of the TPS
harness connector.
l Read resistance between sockets
A3 and C3 on the vehicle harness
connector.
22-12
Check for Short to
Battery +
l Turn ignition off.
l Remove both fuses to the ECM.
l Disconnect 6-way power connector
at the ECM.
l Read resistance between sockets
D2 and B3 on the vehicle harness
connector.
l AISOread resistance between
socket D2 on the vehicle harness
connector and the following
sockets on the 6 way power
connector: C, D,. E and F.
RESULT
I
WHAT TO DO NEXT
Terminals and
Replace ECM, page 4-192.
connectors are okay.
Then go to 22-30.
Problem found.
Repair terminals/connectors,
page 3-2. Then go to 22-30.
Less than or
The vehicle +5 Volt line
equal to 10,000 ohms.
(ckt #916)is shorted to the
return line (ckt #952).
Contact Direct Support.
Greater than
Go
to 22-11.
10,000 ohms or open.
Less than or
Go to 22-9.
equal to 5 ohms.
Greater than
The
vehicle +5 Volt line
5 ohms or open.
(ckt #916) is open.
Contact Direct Support.
All readings are
greater than 10,000
ohms or open.
Any reading is
less than or equal
to 10,000 ohms.
Go to 22-13.
A short exists between sockets
where less than 10,000 ohms
resistance was read. Repair
short (page 3-2) and reinsert
fuses. Then go to 22-30.
3-233