Section 4
TROUBLESHOOTING
CHARTS
TM 9-2320-363-20-1
E. CODE 34-
TURBO
BOOST SENSOR (TBS) SIGNAL VOLTAGE LOW (Cent’d.)
34-8
Check for Open + 5
Volt Line
l Turn ignition off.
. Disconnect the engine harness
connector at the ECM.
l Installa jumper wire between pins
A and C of the TBS harness
connector.
l Read resistance
between sockets
W1 and Y2 on the engine harness
connector.
34-9
Check for Short
l Removejumper wire.
l Read resistance between pins A
and C on the TBS harness
connector.
34-10
Check for Short to
Battery +
l Turn ignition off.
l Removeboth fuses to the
ECM.
l Disconnect
the engine harness,
vehicle harness and 6-waypower
harness connectors at the ECM.
l Read resistance between socket
PI of the engine harness
connector and socket B3 of the
vehicle harness connector.
l AlSO read resistance between
socket P1 on the engine harness
connector and the folllowing
sockets on the 6-way power
harness connector: A, B, E and F.
RESULT
WHAT TO DO NEXT
Less than or
Go to 34-9.
equal to 5 ohms.
Greater than
The
engine +5 Volt line (ckt
5 ohms or open.
#416) is open. Contact Direct
support.
Less than or
The +5 Volt line (ckt #416) is
equal to 10,000 ohms.
shorted to the return line (ckt
#452). Contact Direct Support.
Greater than
Go to 34-7.
10,000 ohms or open.
All readings are
Go to 34-7.
greater than 10,000 ohms
or open.
Any reading is
A short exists between the
less than or equal to
sockets where less than 10,000
10,000 ohms.
ohms resistance was read.
Repair short, page 3-2, and
reinsert fuses. Then go to 34-30.
3-259
