CODE 12 VERNIER CONTROL SIGNAL VOLTAGE HIGH (CONT). -726280270

TM 9-2320-364-20-1

A4 CODE 12 VERNIER CONTROL SIGNAL VOLTAGE HIGH (CONT).

KNOWN INFO

TEST OPTIONS

CHECK ENGINE light (CEL)

Verify repair.

comes ON and stays ON.

Does CEL stay ON longer

Code 12 only displayed on

than five seconds?

REASON FOR QUESTION

DDR.

Wire 952 OK.

If CEL lights for approximately

Vernier control connector OK.

five seconds and then goes

Vernier control OK.

OUT after ENGINE switch is

Wires 1525 and/or 510 not

turned to ON, Fault has been

shorted.

corrected.

Wire 952 not shorted.

DDL connector and/or vehicle

harness connector MC18 OK.

DDEC ECM OK.

POSSIBLE PROBLEMS

Fault corrected.

YES

Go to Fault Index

2-200