STEP/SEQUENCE
RESULT
WHAT TO DO NEXT
TM 9-2320-363-20-1
Section 4
TROUBLESHOOTING CHARTS
E. FLASH CODE: 34
J1587 CODE: P102 4 - TURBO BOOST PRESSURE CIRCUIT FAILED LOW (LOW VOLTAGE)
34-8 Check for Open +5
Volt Line
Turn ignition off.
Less than or
Go to 34-9.
Disconnect the vehicle harness
equal to 5 ohms
connectors at the ECM.
Install a jumper wire between
Greater than
The engine +5 Volt line (ckt
pins A and C of the TBS
5 ohms or open.
#416) is open. Repair open.
harness connector.
Then go to 34-30.
Read resistance between sockets
W1 and Y2 on the engine
harness connector.
34-9 Check for Short
Remove jumper.
Less than or
The +5 Volt line (ckt#416) is
Read resistance between pins A
equal to 10,000 ohms.
shorted to return line(ckt#452)
and C on the TBS harness
Repair short. Then go to 34-
connector
30.
Greater than
Go to 34-7.
10,000 ohms or open.
34-10 Check for Short to
Battery +
Turn ignition off.
All readings are
Go to 34-7.
Remove both fuses to the
greater than 10,000 ohms
ECM.
or open.
Disconnect the engine harness
vehicle harness and 5-way power
Any reading is
A short exists between the
harness connectors at the ECM.
less than or equal to
sockets where less than 10,000
Read resistance between socket
10,000 ohms.
ohms resistance was read. Re-
P1 of the engine harness
pair short and reinsert fuses (or
connector and socket B3 of the
reset breakers). Then go to 34-
vehicle harness connector.
30.
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.
Change 3 3-345.279
