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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)
NOTE - This chart is only to be used if:
1) All basic mechanical checks and physical inspections have been performed with no problem found, and
2) Diagnosis of DDEC-III was started at step START-1, pg H-25 and you have now been referred here.
STEP/SEQUENCE
34-1
Multiple Code Check
Were there any other active
codes besides Code 102/4?
34-2 Sensor Check
Turn ignition off.
Disconnect TBS connector.
Install a jumper wire between
sockets B and C of the TBS
connector.
Turn ignition on.
Read active codes.
If active Code 102/3 or 4 exists go
to RESULT column.
If no active Code 102/3 or 4 exist,
start engine and run
(TM 9-2320-360-10) until either
the "Check Engine" light comes
on or the engine has been running
warm for at least one minute at
greater than 1000 RPM.
Read active codes.
34-3
Check TBS Connectors
Inspect terminals at the TBS
connectors (both the sensor and
harness side) for damage; bent,
corroded, and unseated pins or
sockets.
RESULT
No other codes.
Yes, any or all
of the following codes:
110/3 or 4, 175/3 or 4,
174/3 or 4, 102/3,
100/3 or 4,
187/4, 91/4.
Yes - but none
of the above.
Code 102/3 (and
any codes except
except Code 102/4).
Code 102/4 (and
any other codes).
Terminals and
connectors are okay.
Problem found.
WHAT TO DO NEXT
Go to 34-2.
GO to ENG5V-1 (page H-241).
Go to 34-2.
Go to 34-3.
Go to 34-4.
Replace TBS (para 7-36).
Then go to 34-30.
Repair terminals/connectors
(para 7-77). Then go to 34-30.
H-169
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