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TM 9-2320-360-20-3
Section 4
TROUBLESHOOTING CHARTS
E. FLASH CODE:
34
J1587 CODE:
P102 4 - TURBO BOOST PRESSURE CIRCUIT FAILED LOW (LOW VOLTAGE)
STEP/SEQUENCE
34-8
Check for Open +5
Volt Line
Turn ignition off.
Disconnect the vehicle harness
connectors at the ECM.
Install a jumper wire between
pins A and C of the TBS
connector.
Read resistance between sockets
W1 and Y2 on the engine
harness connector.
34-9
Check for Short
Remove jumper.
Read resistance between pins A
and C on the TBS connector.
34-10
Check for Short to
Battery +
Turn ignition off.
Disconnect batteries (para 7-61).
Disconnect the engine harness
vehicle harness and 5-way power
harness connectors at the ECM.
Read resistance between socket
P1 of the engine harness
connector and socket B3 of the
vehicle harness connector.
Also read resistance between
socket P1 on the engine harness
connector and the following
sockets on the 5-way power
harness connector: A and C.
RESULT
WHAT TO DO NEXT
Less than or
equal to 5 ohms.
Greater than
5 ohms or open.
Less than or
equal to 10,000 ohms.
Greater than
10,000 ohms or open.
All readings are
greater than 10,000 ohms
or open.
Any reading is
less than or equal to
10,000 ohms.
Go to 34-9.
The engine +5 volt line (ckt
#416) is open. Repair open.
Then go to 34-30.
The +5 volt line (ckt #416) is
shorted to return line (ckt #452).
Repair short. Then go to 34-30.
Go to 34-7.
Go to 34-7.
A short exists between the
sockets where less than 10,000
ohms resistance was read.
Repair short and connect
batteries. Then go to 34-30.
H-173
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