[Diy_efi] Jetronic - RFI

Don Sauman donsauman
Thu Mar 2 00:58:41 UTC 2006

Hi Torbj?rn

On this same topic, I have 1987 Volvo 760 GLE that has a related 
problem. While waiting at a railway crossing, an electric train passes, 
and the brake pedal will vibrate and then relax with ABS warning light 
coming on. The immediate fix is to, at an appropriate place, switch off 
the ignition and restart.

I think you have given me a clue as to a solution. Put the ABS 
controller in a grounded box, and use some ferrite beads on the leads.



Torbj?rn Forsman wrote:

> LE2 and LU2 ECUs are notorious for bad RF immunity. In cars where the 
> ECU is located in the passenger compartment, it is common that the 
> engine dies when someone is using a cell phone or portable radio 
> transmitter in the car. This is not surprising, due to the design of 
> the ECU. A 2-side PCB with no ground plane and very little decoupling 
> of incoming signals, and additionally a case with a plastic bottom.
> On the other hand, due to the analog design, those ECUs do not create 
> any nasty RF emissions.
> Best regards
> Torbj?rn Forsman

Don Sauman
35 Asteroid Way
Carlisle 6101
Western Australia

P: 08 9361 0337
F: 08 9361 0581
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