ignition 2 function

can anybody tell me what's the function of ignition 2? some auto-start system mentioned the cable connection to ignition 2 but the other didn't.

Accessory equipment that draws a lot of juice such as heated rear window (rear defog), blower motors, windows, AC, powered only when the engine is running but not powered up during the crank (starting) cycle to save the battery. Connecting ignition 2 is only necessary on MOST vehicles (GM, BMW and Peugeots are exceptions) if you want to run the above items during remote start.

There are some Chryler trucks that actually have 3 ignition wires on top of 3 accessories...Mike M2

Tech Manager

CS Dealer Services

But i'm afraid. When the coil of Ignition 2 Relay energized, the Starter Cut Relay will trigger. Thus make the starter motor to stop. Am I right? See this wiring diagram

You've made the basic amateur mistake of over analysing/over complicating. With a remote start these leads are picked up at the ignition switch well before the relays shown in this frankly unreadable diagramme. Keep it simple, obey the post rules and tell us make, model and exactly what your query is.

"unreadable diagramme" maybe, but I like that it shows the centre-tapped starter solenoid (hence why the take say 20A with the heavy battery terminal (C, to the battery) connected, but double that (40A) when not. That can cause problems for those that only have starter switches or relays that don't handle the higher current (40 Amps through a key switch - not good!). And it shows relays the way I like to see them - ie, functional, not physical. Of course I've taken the liberty of interpreting unreadable diagramme as being its style - not its dithered text. Otherwise I'd have nothing to write other than "x2" (ie - what howiell wrote. (I miss my old 1-page vehicle electrics!)

this diagram described electrical wiring diagram on ignition system for Toyota Camry 2009 . sorry becoz this diagram quite blurred. ok. my question, during remote start for Camry 2009 (auto): a) do I need to connect ignition 2 wires ..and the reason? b) which relay will work to stop the starter motor (centre-tapped starter)? during ignition, max. current can increase up to 30A

First, I've already answered your question about multiple ignitions, second, most decent remote starts allow for starter cut with built in relays, the start circuit at the ignition switch is drawing juice for about 1/2 second, 30amps is more than adequate. In other words, startewr lead is open circuited at the ignition lead. How about stop leading us off on completely irrelevant topics and tell us what make of r/start.

i don't know how remote start work. please help me. why the remote start module have two wires for input 12.0V power supply? why need to have 2 wires?

You need separate wires and fuses to protect the internals of the remote start. Frankly with questions like these DON'T ATTEMPT THIS JOB.