Honda Conversion - Coolant Sensor

[Gourlay83]

I recieved my exhaust from Jim today (Real Nice), this allowed me to get the car up to running temperature. This revealed couple of problems.

Coolant Temperature Sensor is reading 50-55 degrees but it is really 100 degrees. My car is an S1 and as far as I believe you do not need the original ECU. I have wired up the sensor- EHC 1-9 to sensor then sensor to earth.

The Fan Switch doesn't seem to be working. All it does is earth the Fan Circuit which i have checked all works fine. What i am asking is can someone confirm that C101 terminal 7 is the fan switch and that it is just a swtiched earth.

Been through all the diagrams i have and im stumped. Any assistance would be great.

Alan

[Jacobite]

Hi Alan
sorry can't help on the wiring but do know that the HondaElise S/C (K-pro) was set to switch on the fan at 86'C which gave a running temperature of 91-93'C
Setting a lower temperature than lotus/rover did means the fan kicks in more often than it would in a K engined car when its kick in at 104'C I think
the N/A car (Omex) I guess kicks in at a lower temperature as it normally sits about 86-89'C and I've only seen 91'C once in 9 month

Many honda cars run the origional Honda ECU which incidentally Tdi rate better than the Omex as its less succeptable to voltage drop ~ the Omex throws the towel in @ or around 10.5 volts

Hopefully Robin of one of our other Electrical wizards will be able to help you more fully
cheers Hamish

[Gourlay83]

Hi Alan
sorry can't help on the wiring but do know that the HondaElise S/C (K-pro) was set to switch on the fan at 86'C which gave a running temperature of 91-93'C
Setting a lower temperature than lotus/rover did means the fan kicks in more often than it would in a K engined car when its kick in at 104'C I think
the N/A car (Omex) I guess kicks in at a lower temperature as it normally sits about 86-89'C and I've only seen 91'C once in 9 month

Many honda cars run the origional Honda ECU which incidentally Tdi rate better than the Omex as its less succeptable to voltage drop ~ the Omex throws the towel in @ or around 10.5 volts

Hopefully Robin of one of our other Electrical wizards will be able to help you more fully
cheers Hamish

Thanks for the Post Hamish.

I intend on Kpro my ecu in the future.

Good news is I fixed the Coolant Temperature Sender.
It should be EHC1-9 to the Coolant Temp Sender Plug and the actual sender is earthed through the Engine. I added an earth to the 2nd terminal which was throwing the system.

Will have a better look at fan tommorow at least i know the rough temperature of the engine.

Alan

[Jacobite]

Np Alan
Guessing you know that the Honda engine needs more earthing than the K with additonal earths at the gearbox engine block and ECU which had been done on the S/C car and I added to the N/A (Pheonix) which gave a big improvment in the operation of the reverse gear solinoid which now engages more often than not ~well over 85% of the time, still not as slick as the K~pro which switches from the ECU and never missed a beat

[tut]

Alan

Afraid the electrics are not my forte, but Craig can answer any questions that you have.

He is not away at the moment so will probably read this.

tut

[Gourlay83]

Np Alan
Guessing you know that the Honda engine needs more earthing than the K with additonal earths at the gearbox engine block and ECU which had been done on the S/C car and I added to the N/A (Pheonix) which gave a big improvment in the operation of the reverse gear solinoid which now engages more often than not ~well over 85% of the time, still not as slick as the K~pro which switches from the ECU and never missed a beat

Yes, Got that covered. Good thick earths on engine and gearbox.

Whenever there is a problem i always attatch a jump lead from Chassis to Engine just incase anyway.

Just got the fan to get working and thats it done, im away out just now so hopefully get it fixed.

Alan