check in particular the wires coming from the ECU into the TCU - the main TRANS PROG error seems to be a failure of the TCU to receive an engine RPM signal.

Check in your e-box behind the strut tower (different location on 750) and make sure pin 1 has continuity to pin 24 on the TCU connector - you will need to remove the tcu to do this.

Make sure you have continuity between the two - this was what was causing the error on mine - the wire had been stretched in the ebox to the point where it had come loose from the inline fuse holder - NB this inline fuse holder is not on any of the wiring diagrams

i can email you a TCU pinout which also includes test values for all of the pins on the TCU - I suspect however you will find that it is the same error I had

HTH

750iLinOz
1989 750iL
143k, lachsilber, 17" Alpina alloys

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  • Re: Still having 'TRANS PROGRAM' Problems - maun 2008-11-27 23:35:08 (44 views)
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      • Re: Still having 'TRANS PROGRAM' Problems (pic) - bmwbmwfan 2008-11-28 05:31:48 (75 views)
        • Update: Speed Sensor Faulty?? (pic) - bmwbmwfan 2008-12-22 12:17:53 (14 views)