Ignition Coil and ECCS Relay Problems

[Zushi]

Hey, I am currently working on putting a CA18DET engine into a KA24DE Silvia. I have encountered a big problem though. I have got everything done mechanically, but I am in a rut electrically. I think my problem is around the area of the battery, specifically the Ignition Coil Relay and ECCS Relay. My actual problem is in my air flow meter and it not getting enough power. I believe the power routing on my relays might be bad. As a test, I hooked up my air flow meter directly to the battery to see if it would run with the power it needed, and it did. When I hook the air flow meter directly up to the battery though, I hear a clicking noise from the Ignition Coil Relay and the ECCS Relay. Does that mean that my constant battery to the relays is bad or just that by hooking up the air flow meter to the battery I am in a sense bypassing the relays(and running a hard wire). Another situation I found, this one will be a little harder to understand(unless you have a schematics and know what I'm talking about, hopefully some of you will). Well, the Black/Red wire coming out of my Ignition Coil Relay, when tested for connectivity with a multimeter, connects to the Black/white wires coming out of both the Ignition Coil Relay and the ECCS Relay. I looked at the ECU wiring for this and they don't seem to touch anywhere. I don't see why there should be a problem though, it is the stock harness so the two wires shouldn't touch if they're not supposed to. So, are the black/red and black/wires supposed to touch? Let me know. Also, can someone test their car to see if they hear a clicking noise from their relays next to the battery? Well, if you guys got anything that might be able to help me, please please please let me know. Thanks.

[gts4]

2 words

Auto Electrician

[darkhalf]

sounds pretty complex. i can tell you with the ECCS relays from what i have seen....

ECU has constant voltage going in

ECU has ignition voltage going in

When ignition voltage turned on, there is a wire going to the ECCS relay which is pulled to 0v (active low) and the other end of the relay is connected to 12v

When the relay is switched on, this powers up the rest of the components on the ECU and also powers up other EFI bits like fuel regulator, AFM etc.

this is what i see on the R31/R32 diagrams and im guessing it probably would be similar for other nissans since they all have the same 'framework'

this is for when you turn off the ignition - it takes something like 10 seconds before the relay is switched off. program says if vehicle speed sender > 20kph then turn on AFM heat cleaning wire during this time