EXPERTEC TSB (T84-41)

Publication date: 1984-01-02
Reference number: T84-41

EXPERTEC TSB

TECHNICAL SERVICE BULLETIN

Reference Number(s): T84-41, Date of Issue: 01/02/84

CALPAC INSTALLATION-ENGINE - START/NO RUN INFORMATION

Model(s): 1984 Cadillac Cimarrons

Bulletin No.: Cadillac T84-41

Date: 01/02/1984

MODELS AFFECTED

1984 CIMARRONS

SERVICE INFORMATION

After replacement of an ECM on any 1984 Cimarron, the technician may experience a condition where the engine will crank but will not run. This condition may result from the failure to transfer the Calpac from the original ECM to the replacement ECM.

The Calpac supplies valuable information to the ECM such as the number of cylinders in the engine, when to energize the injectors and, therefore, how to calculate the desired amount of fuel for the engine.

The Calpac is adjacent to the PROM and thus can be found by removing the PROM access cover. It is approximately half the size of a PROM and is installed within a socket in the same manner as a PROM (see Fig 1 ).

When diagnosis leads to replacing the ECM, the Calpac and PROM should both be transferred from the faulty ECM to the replacement ECM.

BULLETIN ILLUSTRATION LIST

Fig 1: Graphic