ISIS Wiring Diagram - First Draft - October 2011

I started working on the wiring diagrams for the GTM about 2 months ago. A little thing called work got in the way. Over the past couple days, I have had a chance to concentrate on this project. I am using ISIS Power for my wiring. ISIS is an intelligent multiplex system that does not rely on traditional relays, fuse boxes or fixed functionality. It is simple and flexible.

This is the best explanation video of the ISIS system that I have found.

The brains of the ISIS system is the Master Cell. All inputs to the electrical system go here and are distributed to the appropriate Power Cell. The Power Cell in turn directs current to connected peripherals. Instructions are passed between Master Cell and Power Cells via data bus (the data bus is represented by the heavy red line in the drawings). Power leads are run from the battery/fuses to each Power Cell. This eliminates the need to run high current through the inputs and switches. Signal input from switches to the Master Cell is measured in milliamps.

Major Wiring Diagram.

Based on all the peripherals I plan to incorporate and using the GTM standard worksheets as a starting point (these are the base set up sheets for a GTM available on the ISIS website), I mapped out the number of cells I need to run everything in the GTM. NOTE: This wiring is independent of the engine harness. These are the ISIS components:

1. Master Cell with InTouch Mobile interface card. Location: Forward firewall.
2. (3) Power Cells. Location: (2) forward firewall, (1) rear firewall
3. InMotion Cell, Location: Forward Firewall.
4. InTouch Console: Double Din center console.
5. InDash: Behind driver's dash board.
6. Mirror Controller: Forward firewall.

InMotion Cell handles bi-directional items like windows and telescoping steering column.
ISIS is coming out with a unit dedicated to controlling the side view mirrors. I presume it will be priced below an InMotion cell. 

Power Cell 1 reflects basic ISIS programming for the GTM. These peripherals are all located forward.

Power Cell 3 is an addition to the basic 3 cell starter kit. It manages most of the additional electronics I plan to add.

Power Cell 2 is located in the rear engine compartment. It reflects basic ISIS programming with the addition of the seat heaters.