DirectScan still requires native DOS to perform realtime data
However, you can run DirectScan under Windows in order to review
previously saved buffers (log files)... with a little help.
Try a program called "DOSBox". It's purpose is to emulate
DOS under many different OS's - including Windows Vista and even Mac OS
X. With it, you should be able to run DirectScan and perform
all of the normal functions available under native DOS - with the exception
of realtime data viewing and capture. This is useful if you would like
to review the recorded buffers at some later time on your desktop PC (or
Usual disclaimer: Chu Engineering is in no way
affiliated with the makers of DOSBox. Use DOSBox at your own
risk. No support from Chu Engineering for DOSBox is given or otherwise
DirectScan EMI Shield
Some vehicles by nature produce more EMI noise than other vehicles.
This "noise" emminates primarily from the ignition system - i.e.:
spark plug wires, ignition coils, etc. This noise has been known to transfer
onto the DirectScan ECM ribbon cable and cause erratic behavior.
Known behavior / symptoms include:
Normal operation while cruising but suttering at WOT.
Strange, intermittent "hickups" or stuttering during vehicle
operation (idle, cruise, and / or WOT).
Only occurs when DirectScan is attached to the ECM. The laptop
can either be connected or not to show these symptoms. The symptoms have
also been known to occur with just the ribbon cable attached.
To remedy the issue, an EMI shield can be placed over the ribbon cable
to prevent this noise from coupling to the ECM. If you believe that you
need the shield, please contact Conley's
Performance Plus at (281) 540-FAST to request it. As with
any service call, please have your unit serial number ready.
Some laptops have been encountered which do not fully adhere to the
original IBM parallel port standard, and thus do not correctly function
with DirectScan version 1.0. The laptops seen (so far) to exhibit
this behavior include:
Compaq LTE Elite
Toshiba Satellite 105CS
Toshiba Satellite 410 CDT
Some Zenith Laptops
To correct this, a new DirectScan adaptor has been developed.
This adaptor requires Software Version 1.1.
If you see the following on your laptop, then you may have a
similar laptop and require the adaptor for correct DirectScan functionality.
All measurements are taken with the key on, engine off, and after power
to the ECM has been disconnected for a few seconds, then reconnected. These
are only some of the readings you may encounter.
Note: Version 1.5 of the Hardware Interface Module has the adaptor
"built-in". Thus, if you have one of the above mentioned laptops,
using Hardware version 1.5 should prevent the above issues from occuring.
"Thrasher" brand chips
On some vehicles, there appears to be an incompatability between the
"Thrasher" brand ECM chips and DirectScan. Some vehicles
exhibit strange behaviors ranging from switching to "limp home"
mode after running for 10+ minutes to causing the car to stutter to simply
displaying erratic data on DirectScan during DFCO mode.
Unfortunately, the company which developed the "Thrasher"
brand ECM chips is no longer doing development on this chip.
Remedies to avoid this problem have ranged from switching to other
brand ECM chips to finding a version of the "Thrasher" brand
ECM chips which do not exhibit these problems.