Cold Start Valve Power (CSV)

[fishlaw]

My CSV isn't operating. The thermo time switch (TTS) is closed to ground, but I am not see positive voltage at either the CSV or the TTS. According to the EFI manual, both pin 86 and 86A at the fuel injection relay are connected together and should get powered when the ignition key is in the start position. One goes to the ECU and one goes to the TTS/CSV. Are these only electronically connected by the operation of the relays?

[spider2081]

I believe power from the ignition switch should enter the dual relay on pin 86a. Looking at the fuel injection diagram in the Fiat publication "Spider 2000 Electrical diagnostic Manual" (in the library at Mirafiori.com) Pin 86a of the dual relay is hard wired to pin 86 inside the dual relay so the relay has to be plugged into the cars harness for pin 86 to have power. Neither of the relays inside the dual relay need to be energized for pin 86 to be powered but the connector with the colored wires needs to be installed to bring "Start" power to the dual relay.
I would think if neither the CSV or the thermal time switch have power then the ECU pin 4 probably is not powered either.
The pin identified as pin "G" on the thermal time switch should get power when the ignition switch is in the start position, the thermal time switch provides a ground out of its pin "W" for around 6-10 seconds. I believe as the TTS ages the length of time pin "W" is grounded lessens until there is a total failure of the switch and it does not provide the ground. The TTS needs to be powered to turn the ground off.
The TTS pins are labeled on the sides of the TTS's connector not on the cars wire harness connector. I also think the TTS connector is the only FI system 2 pin connector whose wires must be in their proper positions.
This site has been down so it took a couple days before I could post.
Hope this is some help