Starting Question

[tvrjohn]

Noticed today that when engine is turning over on the starter motor, both the radiator fans come on ?
But if the ignition is on only, the fans are off ?

Can anyone diagnose the solution ?

Thanks

[satman]

A wild guess cos i dont really know.......I think..the fans are controlled by the ECU...I also believe that there are some sensors that pick up when the engine is be turned over/running..(timing??)..so when the ECU detects engine revolutions, it sends also a signal to the fan switch??...this is completely a wild guess and could be utter bull$**t...in which case you have an electrical fault!!

[kojak]

satman said:

in which case you have an electrical fault!!

Good diagnosis Paddy.

[kevin63]

Check that the battery is fully charged as if not can cause all sorts of problems when starting as bat power is drained away.

[Julian64]

satman said:

A wild guess cos i dont really know.......I think..the fans are controlled by the ECU...I also believe that there are some sensors that pick up when the engine is be turned over/running..(timing??)..so when the ECU detects engine revolutions, it sends also a signal to the fan switch??...this is completely a wild guess and could be utter bull$**t...in which case you have an electrical fault!!

P.S. How you getting on wit hthe emerald satman.

[satman]

Julian64 said:

P.S. How you getting on with the emerald satman.

Not got to that bit yet...had the nitrons done...handbrake mod...'big' service...decatted...just waiting for 'God' to arrange a booking for me...would be nice to be the first 'standard' 4.5 to break the 400bhp barrier!

[tvrjohn]

kevin63, thanks regarding possibly caused by low battery power.
Hopefully that was it, as was struggling to start it
will keep an eye on it, cheers