Fuel - Pump Check Connector, Manual Update

91mitsubishi07

NO. TSB-91-13-012

DATE August, 1991

MODEL 1991 Eclipse


SUBJECT: FUEL PUMP CHECK CONNECTOR


TSB Revision TSB-91-13-012

PURPOSE

This bulletin revises the fuel pump check connector circuit schematics and provides diagnostic procedures for some early 1991 production Eclipse vehicles which were manufactured without a fuel pump check connector.

Please make the indicated service manual updates as shown on page 2 and as reference to this TSB, please write this TSB number in the TSB revision box on the affected service manual pages.

Fig. 3:

DETAILS

1. The 1991 Eclipse Service Manual shows the fuel pump check connector being connected to the fuel pump power wire after the MPI Control Relay. This is incorrect. The check connector is actually connected between the MPI control relay and the MPI control unit. Not shown in the Service Manual is terminal 13 (Connector C-66), which is connected to the MPI control unit. Shown in Fig. 3 is the corrected schematic diagram.

2. Some early 1991 production Eclipse vehicles were manufactured without a fuel pump check connector. To check the fuel pump on these vehicles it is necessary to introduce 12 volts to the proper terminal of the MPI control relay. Refer to Fuel Pump Activating Procedure.


SERVICE MANUALS AFFECTED

1991 Eclipse Volume 1, pages 13-98, 13-103, 13-108, 13-114. 1991 Eclipse Volume 2, pages 62, 67, 73, 79.





TYPICAL SERVICE MANUAL UPDATE

As shown below cross "X" out the fuel pump check connector information and write in "REFER TO TSB-91-13-012 FOR FUEL PUMP CHECK CONNECTOR DIAGRAM"





FUEL PUMP ACTIVATING PROCEDURE

(some early 1991 Eclipse vehicles without a fuel pump check connector)

1. Remove the right side console cover.

2. Disconnect the MPI control relay.





3. Connect a 12 volt power source to the harness side connector of the MPI control relay to activate the fuel pump.