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Engine Control Module: Customer Interest
Engine - No Start, Hard Start

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.

Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules - Computers and Control Systems > Engine Control Module > Component Information > Technical Service Bulletins > Customer Interest: > 289102

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