Section 4
TM9-2320-363-20-1
CHARTS
E. CODE 34•
TURBO
BOOST
SENSOR
(TBS) SIGNAL
VOLTAGE LOW (Cent’d.)
344
Check for + 5 Volts
l Remove jumper wire.
l Turn ignition on.
l Read voltage on TBS harness
connector, pin C to pin A.
34-5
Check for Signal Open
l Turn ignition off.
l Disconnect the engine harness
connector at the ECM.
l Installa jumper wire between pins
A and B of the TBS harness
connector.
l Read resistance between sockets
PI and Y2 on the engine harness
connector.
34-6
Check for Short
l Remove
jumper.
l Read resistance between pins A
and B on the TBS harness
connector.
l Also read resistance between
socket B and a good ground.
34-7
Check ECM
Connectors
l Check terminals atthe ECM engine
harness connector (both the ECM
and harness side) for damage;
bent, corroded and unseated pins
or sockets.
Between 4 to
6 volts.
Less than
4 volts.
Greater than
6 volts.
Less than or
equal to 5 ohms.
Greater than
5 ohms or open.
Less than or
equal to 10,000 ohms
on either reading.
Greater than
10,000 ohms or open
on both readings.
Terminals and
connectors are okay.
Problem found.
GO to 34-5.
Go
to 34-8.
Go
to 34-10,
Go
to 34-6.
Signal
line (ckt #432)or return
line (ckt #452)is open. Repeat
check from pin A to Y2 and pin
B to PI. Contact Direct Support.
Signal
line (ckt #432) is shorted
to the return line (ckt #452).
Contact Direct Support.
Go
to 34-7.
Replace ECM, page 4-192.
Then go to 34-30.
Repair terminals/connectors,
page 3-2. Then go to 34-30.
3-257
