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'''Testing the Fan Control''' I'd very much like to get rid of the silly otter switch arrangement found in Griffiths. There are 2 fans on the later Griffs. My current plan is to control them independantly from the fan and water pump controls from VEMS, with different on temperatures and different levels of hysteresis. There's no real reason for this, other than it's giving me options... Well, after an exhausting search for the coil wires on the fan relays (they went into the engine bay and came out again...) I plugged them in to VEMS, set the temperatures and they worked. First time too. It's a shame the temp sensor isn't configured right yet. Note that temperature calibration is now correct. * I noticed the relays have diodes built into them. Nice and easy! ** what type of relays ? Most relays don't have flyback diode inside *** They're a Lucas/Bosch 5 terminal relay used on the TVR and RangeRover. The diode is (obviously) across the coil terminals. The original ECU needed the diodes or it sulked in a fairly major way! Will look up the part number and post it here. '''Fuel pump''' Fuel pump relay has been connected. I'm using EC36 pin15 - P259 channel 5. I'm using 3.5 seconds for initial prime and it continues for a second after the engine stops. Both parameters unscientifically measured from the previous ECU. It's often a good idea to use free injector outputs (If you still have some free) first (more rigid) before using up p259 outputs. Measure resistance of relays (and inductivity too if your DVM supports L measurement). I have 8 injectors running sequentially so there's none spare. I've used the same relay as the fans have (ie those with added diode) so I have at least the illusion of protection for P259. Back to MembersPage/DavidBlades
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