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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).
2.
KNOWN INFO
TEST OPTIONS
CAUTION
Read CAUTION
Lamp check OK, no data link or
Resistance test.
on Page 2-435
no DDEC data received.
STE/ICE-R #91.
Codes are not flashing out when
CHECK ENGINE light is
REASON FOR QUESTION
illuminated.
Are more than 5 ohms
Resistance greater than 5 ohms
measured between wires 435
at DDL connector indicates
POSSIBLE PROBLEMS
and 451 at DDL connector
open in diagnostic request line
MC13, terminals A and M?
wire 451 or bad ground at
Open in diagnostic request line.
terminal A on DDL connector.
Damaged DDEC ECM
connectors.
Open in data line.
Short in data line.
DDR fuse faulty.
Short to ignition and ground.
Go to Step 3 of this
NO
Fault.
YES
Repair wire 451 (see
schematic Fig 2-1) or
notify DS
Maintenance.
Verify repair, go to
Step 8 in this Fault.
3.
KNOWN INFO
TEST OPTIONS
CAUTION
Read CAUTION
Lamp check OK, no data link or
Visual inspection.
on Page 2-435
no DDEC data received.
Codes are not flashing out when
REASON FOR QUESTION
CHECK ENGINE light is
Are vehicle and power
illuminated.
Damaged connectors could
Diagnostic request line OK.
harness connectors free from
affect signal to DDEC ECM.
damage?
POSSIBLE PROBLEMS
Damaged DDEC ECM
connectors.
Open in data line.
Short in data line.
Repair harness
DDR fuse faulty.
connectors
Short to ignition and ground.
(Para 7-101) or
NO
replace DDEC ECM
(Para 7-56).
Verify repair, go to
Step 8 of this Fault.
YES
Replace DDEC ECM
(Para 7-56).
Verify repair, go to
Step 8 of this Fault.
2-434
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