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)
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 3-345.41 and you have now been referred here.
34-1
Multiple Code Check
Were there any other active
No other codes.
Go to 34-2.
codes besides Code 102/4?
Yes, any or all
Go to ENG5V-1 (page 3-345.413).
of the following codes:
110/3 or 4, 175/3 or 4,
174/3 or 4,102/3,
100/3 or 4, 94/3 or 4,
101/3 or 4 73/3 or 4.
Yes - but none
Go to 34-2.
of the above.
34-2
Sensor Check
Turn ignition off.
Code 102/3 (and
Go to 34-3.
Disconnect TBS connector.
any codes except
Install a jumper wire between
except Code 102/4.
sockets B and C of the TBS
harness connector.
Code 102/4 (and
Go to 34-4.
Turn ignition on.
any other codes).
Read active codes.
If active Code 102/3 or 4 exists go
to RESULT column.
If no active Code 102/3 or 4 exists,
start engine and run 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.
33-4
Check TBS Connectors
Inspect terminals at the TBS
Terminals and
Replace TBS. Then go to
connectors (both the sensor and
connectors are okay.
34-30.
harness side) for damage; bent,
corroded, and unseated pins or
Problem found.
Repair terminals/connectors.
sockets.
Then go to 34-30.
Change 3 3-345.275
