Sorry, I meant the ECU relay diode shown in the 88/89 Bentley diagram is
not being used as for suppression. The most common FP and ECU relays are
the Type 53 relays and these have a suppression resistor across the coil
pins. Perhaps that is what you saw on the diagram on the relay itself?

Mark

mark drillock wrote:
> First of all, there are serious errors in that ECU/FP relay part of the
> 88/89 Bentley Digifant diagrams, with connections shown wrong. Second,
> the change to the more complex ECU relay with diode did not occur
> exactly on the 88 model year break so your 88 may have come with the 87
> type FI harness.
>
> That diode is NOT being used as a suppressing diode.
>
> Mark
>
> neil n wrote:
>> Hi all.
>>
>> Am finding a bit of poor work and mysterious things in my 1988 Westy
>> engine bay.
>>
>> Situation: engine bay wiring harness likely replaced. ECU and fuel
>> pump relays are both 4 pin Hella 53. Relay diagram shows what may be a
>> suppressing diode in parallel at relay coil.
>>