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Page Title:
CODE 12 VERNIER CONTROL SIGNAL VOLTAGE HIGH (CONT). |
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 TM 9-2320-364-20-1
A4 CODE 12 VERNIER CONTROL SIGNAL VOLTAGE HIGH (CONT).
2.
TEST OPTIONS
KNOWN INFO
WARNING
READ WARNING
CHECK ENGINE light (CEL)
DDR test.
on Page 2-195
comes ON and stays ON.
Code 12 only displayed on
REASON FOR QUESTION
DDR.
Are any codes besides code
A short in wire 916 (+5 volt line)
POSSIBLE PROBLEMS
12 displayed on DDR with
may cause other faults to
vernier control connector
appear.
Wire 952 faulty.
MC38 disconnected?
Vernier control connector faulty.
Vernier control faulty.
Wires 1525 and/or 510 shorted.
Wire 952 shorted.
DDL connector and/or vehicle
harness connector MC18
faulty.
Go to Step 5 of this
NO
DDEC ECM faulty.
Fault.
YES
3.
TEST OPTIONS
KNOWN INFO
WARNING
READ WARNING
Resistance test.
CHECK ENGINE light (CEL)
on Page 2-195
STE/ICE-R #91.
comes ON and stays ON.
Are 5
Code 12 only displayed on
ohms or
DDR.
REASON FOR QUESTION
less measured on the return
line wire 952 between vehicle
Resistance greater than 5 ohms
POSSIBLE PROBLEMS
harness connector MC18,
at vehicle harness connector
terminals C3 and D1?
indicates open in return line wire
Wire 952 faulty.
952.
Vernier control connector faulty.
Vernier control faulty.
Wires 1525 and/or 510 shorted.
Wire 952 shorted.
DDL connector and/or vehicle
Repair wire 952 (see
harness connector MC18
schematic Fig 2-1)
faulty.
or notify DS
NO
DDEC ECM faulty.
Maintenance.
Verify repair, go to
Step 8.
YES
2-194
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