Section 4
TROUBLESHOOTING
TM 9-2320-363-20-1
CHARTS
E. ENG5V=ENGINE HARNESS +5 VOLT SUPPLY
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-11 was started at step Start-1 (page 3-121) and you have now been referred here.
ENG5V-1 Check for Low
Battery Voltage
l Was there also a Code 46?
ENG5V-2 Check for +5 Volts
l Turn ignition off.
l Disconnect the Oil Pressure Sensor
(OFS) and Turbo Boost Sensor
(TBS) connectors.
l Turn ignition on.
l Ateach sensor harness connector,
read voltage between socket C
and socket A.
ENG5V=3 Check ECM
L
Connectors
l Check terminals at the ECM engine
harness connector (both the ECM
and harness side) for damaged,
bent, corroded and unseated pins
or sockets.
RESULT
WHAT TO DO NEXT
Yes.
-Go to 46-I, page 3-301.
No,
*Go to ENG5V-2.
Between 4.7
-Voltage reading is correct. Check
and 5.2 volts
voltage at next connector. If all
connector voltage readings are
correct, go to ENG5V-3.
Greater than
*Go to ENG5V-6.
5.2 volts
at all connectors.
Terminals and
connectors are okay.
Then go to ENG5V-30.
Problem found.
- Repair terminals/connectors,
page 3-2. Then go to ENG5V-30.
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