Engine - No Start, Hard Start

91audi01

Group: 28

Number: 91-02

Date: March 31, 1991


Subject: Engine - Vehicle No Start/Hard Start, Below 45~F (7~C) Ambient Temperatures

Model(s): 200/200 Quattro MY 1989-1990 (With MC Engines)


Condition:

No signal from engine management ECU, to the cold start valve.


Production:

Production processes improved, to help assure that ECU is not damaged during production.


Service:

a) Check function of signal to cold start valve

b) If no signal, replace ECU


Caution:

When working on ECU do not disconnect ECU from vehicle wiring harness within 30 seconds of turning the ignition switch off, this may damage the ECU.