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Page Title:
P102 4 - TURBO BOOST PRESSURE CIRCUIT FAILED LOW (LOW VOLTAGE) (cont) |
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 TM 9-2320-364-20-1
Section IV. TROUBLESHOOTING CHARTS (Cont.)
E. FLASH CODE:
34
J1587 CODE:
P102 4 - TURBO BOOST PRESSURE CIRCUIT FAILED LOW (LOW VOLTAGE)
STEP/SEQUENCE
RESULT
WHAT TO DO NEXT
34-4
Check for +5 Volts
Remove jumper wire.
Between 4 to
Go to 34-5.
Turn ignition on.
6 volts.
Read voltage on TBS connector,
pin C (red lead) to pin A (black
Less than
Go to 34-8.
lead).
4 volts.
Greater than
Go to 34-10.
6 volts.
34-5
Check for Signal Open
Turn ignition off.
Less than or
Go to 34-6.
Disconnect the engine harness
equal to 5 ohms.
connector at the ECM.
Install a jumper wire between
Greater than
Signal line (ckt #432) or return
pins A and B of the TBS
5 ohms or open.
line (ckt #452) is open. Repeat
connector.
check from pin A to Y2 and pin
Read resistance between sockets
B to P1. Repair open. Then go
P1 and Y2 on the engine
to 34-30.
harness connector.
34-6
Check for Short
Remove jumper.
Less than or
Signal line (ckt #432) is shorted
Read resistance between pins A
equal to 10,000 ohms
to the return line (ckt #452).
and B on the TBS connector.
on either readings.
Repair short. Then go to 34-30.
Also read resistance between
socket B and a good ground.
Greater than
Then go to 34-7.
10,000 ohms or open
on both readings.
34-7
Check ECM Connectors
Check terminals at the
Terminals and
Replace ECM (para 7-57).
engine harness connector
connectors are okay.
Then go to 34-30.
(both the ECM and harness side)
for damage; bent, corroded, and
Problem found.
Repair terminals/connectors
unseated pins or sockets.
(para 7-101). Then go to 34-30.
2-675
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