MIL ON at Any Speed or Load DTCs 1111 or 2312 Set

Group: D2

Number: 92-01

Date: 03/15/92


Subject:
Engine Warning Light Comes On, Flashes


Model(s):
80, 90 (quattro)
with engine code NG
M.Y. 1988-1992


THIS TECHNICAL BULLETIN SUPERSEDES PRODUCT CIRCULAR GROUP D2, NO. 90-01 (MARCH 16, 1990)


Condition

Engine warning light flashes or comes on brightly at any engine speed or load. Ignition and/or-fuel injection control modules may display DTC (Diagnostic Trouble code) 1111 or 2312.





Cause

^ Faulty ground connection at intake manifold stud (arrow).
^ Faulty ground connection at ignition control module mounting bracket


Service

Intake manifold ground:
- Remove ground connections from stud
- Remove CO tap tube bracket from stud
- Remove stud from intake manifold and carefully clean threads of all dirt and foreign material.
- Reinstall stud (clean and dry without sealant)
- Torque to 10 N-m (7 ft.lb.)
- Reinstall CO tap tube bracket
- Reinstall ground connections with a suitable shakeproof washer





Kick panel ground:
- Remove ground connection (No. 43) from ignition ECM mounting bracket at right kick panel
- Carefully clean threads of all dirt and foreign material
- Reinstall ground connection with a suitable shakeproof washer