Wiring up to switch between Map A and Map B.

Wiring diagrams and questions
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Holden202T
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Re: Wiring up to switch between Map A and Map B.

Post by Holden202T »

yeah it will change depending on the ecm used .....

according to a wiring diagram I have F12 is the pin for VS V6 Auto, that's for power/economy switching, the A9 is something different though for LPG.

MAP switching or power/economy switching is normally grounding the pin, that A9 for LPG is getting +12v applied to it .....
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MAGP
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cars: VC V8 sedan, VS V6 wagon, VT V8 Landcruiser.

Re: Wiring up to switch between Map A and Map B.

Post by MAGP »

The 12 volts is so the engine runs on petrol, disconnecting the 12 volts from the PCM makes it run on LPG.
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Holden202T
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Re: Wiring up to switch between Map A and Map B.

Post by Holden202T »

yeah I understand that, I'm just trying to point out its not the map switch we refer to in earlier ecms, its doing something different.
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