034 llC Indicator light for MAP SEL switch function?

Standard relay's don't toggle. Latching relays would "toggle" or be "maintained" until the coil/contacts are reset.

No wonder it is taking me 6 weeks to wire this car!

But I think you could use the instant spst switch/button to send ground to both the ecu (MAP SEL toggle a/b) and to the relay to toggle an indicator on/off with each cycle...???

Why use an SPST switch? Use a SPDT switch and just ground the lamps with it, too. Sort of like you've done it with the relay above, but with lights in place instead of the relay coil.

A single switch that would (press once) a/b toggle the ground to lights and just instantaneously send ground sig to ECU would be ideal

my head hurts I need to lie down...

WAUG0806 said:

I am re-installing my llc and want to hook up momentary ground MAP SEL map switch function...

Click to expand...

Wait, what? To switch maps do you put the map sel input to ground momentarily? i thought it would be on the second map only when the input was connected to ground.

If it is momentary, he CANNOT use a standard relay, as I said previously. The coil needs a power and ground source to be maintained on a standard relay in order to shift from the NC terminal to the NO terminal. If he wants to use the momentary map select switch to shift a relay it needs to be a latching type relay, and his switch should be a DPDT type switch in order to latch and un-latch the relay.

cuatrokoop said:

If it is momentary, ...

Click to expand...

That's what I'm asking. IS the map select a momentary trigger?

034 IIc tuning manual said:

Map# - This shows the status of the map select input, either map #1 or #2. To
change maps, ground the appropriate ECU pinout (see the wiring diagram
provided).

Click to expand...

then later in the manual

034 IIc tuning manual said:

MapSel - Shows the state of the Map Select pin LOW/HIGH

Click to expand...

this would make me believe it is not a momentary trigger but uses the second map whenever the input is grounded.

?? is it a momentary input?

It is not a momentary input.

This is how mine is setup:

Rocco16V said:

You could use a DPST (Double Pole Single Throw) switch and have a light lit when using map B and unlit when using map A

Click to expand...

Rocco16V said:

?? is it a momentary input?

Click to expand...

Absolutely not, it is a switched input and must be pulled to ground, or left open to select between the two maps.

Thats what i thought. but the OP said he wanted a momentary trigger for it. so i thought i would try and clarify what was needed.

Thanks Newt and mark!