What is the Apex Multichecker?
The A'PEX-i Multi-Checker features:
Monitors all various aspects of NISSAN vehicles using the diagnostic signal.
The Multi-Checker is a valuable diagnostic tool designed for most NISSAN fuel injected automobiles. The unit monitors and displays a wealth of information and is unmatched by any other similar diagnostic meter on the market today.
The unit displays vehicle speed and engine RPM both in real-time and peak hold modes. Injector pulse duty is displayed in percentages with a peak hold mode. The airflow percentage, ignition timing, horsepower display, torque display, and air-fuel ratio display add to its impressive list of functions.
The unit can also alert the driver to recommended up-shifting points and will sound an alarm as the air flow meter or injectors reach maximum capacity. A large, easy-to-read display clearly shows all functions and is back-lit in orange for easy nighttime visibility. The display can also be set to a bar graph mode for quick and efficient monitoring.
Installation
The instruction manual has NO instruction for the 95+ 240sx ecu, so I went through lots and lots of trial and error to get this working. In the end I ended up calling Apex-I in California.
To start, here's a few tips:
Make sure you disconnect your battery 1st, to ensure safety of your car!
Once you get to your ecu (located behind the passenger kick plate), you will find a white cover over the wires, to get it off, one side of the cover has two clips that you can stick your flathead screwdriver in to pop it off.
Do that and pull a little.
You dont have to remove the ecu to do this, just the wire bracket off the ecu.
Follow the directions exactly, but use this diagram....settings are the same as the LARGO:
<to see larger image: right-click / view>
Pin numbers:
#102- Injector signal
#3- N0.1 Ignition Signal
#10- Ground
#26- Vehicle Speed Signal
#38- IG Power
#40- Crank 180 Degree Signal
#41- Crank 1 Degree Signal
#47- Air Flow Signal
#38- Ignition Power
For the dip switch settings:
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