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Cruise Control System - Troubleshooting

89porsche06

Technical Bulletin


Subject: Cruise Control Troubleshooting
Model Group

911 Carrera 2

Part Identifier Number

2778 8908
December 8, 1989



ATTENTION: Service Manager/Service Technician

911 Carrera from Model Year 1988

The pneumatic cruise control system was replaced with an electrically controlled version (Tempostat E) as of model year 1988. The cruise control unit of this version is identical with the control unit used in 928 S4 models.

When troubleshooting the cruise control system on 911 Carrera cars up to and including model year 1987 (pneumatic version), use troubleshooting guide from 911 Carrera Workshop Manual, Volume 1, Page 27-3.

For 911 Carreras as of model year 1988 (electrically controlled version), use troubleshooting guide from 928 Workshop Manual, Volume 1-A, Pages 27-21 through 27-23.
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