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Page Title:
NO DATA LINK AND LAMP CHECK OK (CONT). |
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 TM 9-2320-364-20-1
C2 NO DATA LINK AND LAMP CHECK OK (CONT).
6.
KNOWN INFO
TEST OPTIONS
Lamp check OK, no data link or
Visual inspection.
Is DDR fuse free of
no DDEC data received.
damage?
Codes are not flashing out when
REASON FOR QUESTION
CHECK ENGINE light is
illuminated.
Faulty DDR fuse will also cause
Diagnostic request line OK.
this symptom, even if there is no
DDEC ECM connectors OK.
problem with DDEC.
No open in data line.
No short in data line.
POSSIBLE PROBLEMS
DDR fuse faulty.
Short to ignition and ground.
NO
Replace DDR fuse.
YES
7.
WARNING
KNOWN INFO
TEST OPTIONS
Read WARNING
on Page 2-439
Lamp check OK, no data link or
Resistance test.
Are there
no DDEC data received.
STE/ICE-R #91.
more than
Codes are not flashing out when
5 ohms measured between
CHECK ENGINE light is
REASON FOR QUESTION
illuminated.
wires 900 and 435, 900 and
Diagnostic request line OK.
Short is suspect. Resistance
432, 901 and 435, and 901
DDEC ECM connectors OK.
less than 5 ohms on any
and 432 at DDL connector
No open in data line.
reading at DDL connector
MC13, terminals J and A, J
No short in data line.
indicates short between a data
and H, K and A, and K and H?
DDR fuse OK.
line and ignition wire 439 or
ground wire 150.
POSSIBLE PROBLEMS
Repair wires 900,
435, 439, 150, or 901
Short to ignition and ground.
(see schematic
NO
Fig 2-1) or notify DS
Maintenance.
Verify repair, go to
Step 8 in this Fault.
YES
2-438
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