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Page Title:
CHECK ENGINE LIGHT (CEL) ALWAYS OFF (CONT). |
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 TM 9-2320-364-20-1
B CHECK ENGINE LIGHT (CEL) ALWAYS OFF (CONT).
7.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
CHECK ENGINE light (CEL)
Voltage test.
on Page 2-423
does not illuminate.
STE/ICE-R #89.
Are there
DDEC ECM vehicle harness
10 to 14 vdc
connector OK.
REASON FOR QUESTION
measured between wire 150 at
CEL OFF with jumperwire
power harness connector
installed at vehicle harness
Less than 10 volts at any
MC17, terminals C and D and
connector.
reading indicates ground line
No short in +12 volt line
wires 241 and 240 at terminals
wire 150 is open.
wire 439.
A, B, E and F?
CEL indicator lamp OK.
No open in CEL driver wire 419.
No open in +12 volt wire 439.
No short/open in battery positive
Repair wire 150 (see
wires 240 or 241.
schematic Fig 2-3) or
notify DS
NO
POSSIBLE PROBLEMS
Maintenance.
Verify repair, go to
Open in ground wire 150.
Step 9 of this Fault.
Damaged DDEC ECM terminals
or connectors.
YES
2-422
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