V3.2.x / 2.8.x New Feature: Dual on-the-fly switchable Ignition Configuration

The new firmware offers the ability to switch between two ignition configurations on the fly, via a driver-operated switch.

Enabling this feature is accomplished in two parts.

Wiring option switch

For 3.1.0 controllers, the option input on the Molex connector is used to switch the ignition configuration. The active configuration is selected as follows:

Configuration 1: 0 volts present on Option Port Configuration 2: 5 volts present on Option Port

Note: there are multiple ways to enable the option port; presented are the approaches which require zero to minimal modification to the MJLJ PC board.

3.x MJLJ controller with TPS

Switch between ground and the 5v Vref used to drive TPS

Insert schematic here*

3.x MJLJ controller with MAP sensor

switch between ground and +12v into option port via 1K Resistor (to limit current on 5v zener)

insert schematic here*

2.x MJLJ controller

Add pull up resistor between +5v side of 2n3905 to unused pin on molex connector (Option port on V3.x board) and add jumper to processor pin

Switch between ground and open circuit

add schematic here*

Enabling switchable ignition configuration

...To do...