[vigsom]

Originally Posted by HondaSport

1. linking the 2 fans together; I can now see the larger fan also kicking in.
2. Is this solution acceptable given I do not want to incur the cost of an ECU replacement?
3. Also, is there a temperature gauge that I can install since the City does not have one, only a warning light.

A No to points 2 and 3 above. The system works like this.

a. The fan to the left of the radiator is the radiator fan and the one on the right is the AC condenser fan
b. Radiator fan turns on and off based on engine coolant temperature. Condenser fan motor and radiator fan motor turn on when the AC compressor kicks in and go off when the compressor clutch disengages.

There is nothing wrong with your ECU. The issue might be that the fan motor relay is not working or a connected fuse is blown and hence the radiator fan motor isn't turning on. Please get that checked.

Related post here

[HondaSport]

Originally Posted by sandeepmohan

No.

Are you sure the second fan is there to aid cooling of the radiator? Or is it active only when the aircon is running?

Yes, one fan for the radiator and another 1 for the AC condenser.

Originally Posted by vigsom

A No to points 2 and 3 above. The system works like this.

a. The fan to the left of the radiator is the radiator fan and the one on the right is the AC condenser fan
b. Radiator fan turns on and off based on engine coolant temperature. Condenser fan motor and radiator fan motor turn on when the AC compressor kicks in and go off when the compressor clutch disengages.

Related post here

Thank you for the detailed input

Originally Posted by vigsom

There is nothing wrong with your ECU. The issue might be that the fan motor relay is not working or a connected fuse is blown and hence the radiator fan motor isn't turning on. Please get that checked.
Related post here

Will do, this was very helpful.