Haltech E8 - Manual (Page 161)

Haltech E11/E8 Instruction Manual
Appendix C: Fault Finding
No communications .
Check communications cable. Check that it is plugged in firmly and does not have damage. Cables are
easily damaged when shut in car doors.
Check power to ECU. Check that the car’s ignition is turned on to supply power to the ECU.
Check software for correction ECU type. Make sure the software corresponds to the ECU type.
Check that no other software is using the COM port that the Haltech programming software intends to use.
Some software used for synchronising palmtop computers can often open the port and may block Halwin
from accessing that particular COM port.
Make sure you are using a supported operating system. Check the System requirements in Appendix D.
If using a USB/Serial Adaptor ensure that the driver has been correctly installed and the device is setup as
the same COM port as the Halwin software is trying to communicate on.
No RPM signal
Check power to the Hall effect or optical sensor if either of these types of sensors are used for crank
position/speed detection.
Check the power to the ECU when the car is cranking. Some vehicles disconnect power to accessory
devices when cranking to minimise power draw from these devices. If your ECU power relay is switch by
this source, then the ECU will lose power when cranking.
Check the trigger wiring. If you have access to an oscilloscope, then check the input to the ECU.
Check trigger configuration. Ensure that you have selected and configured the correct trigger for the
vehicles trigger type.
No Spark or No Injection Pulses
Check that you have a good RPM signal. You should see a cranking speed of between 100 – 250 RPM.
See trigger setup if you do not have a good RPM signal.
Check power to your ignition coils and injectors. Re-check them while cranking if there is any doubt.
Check all fuses.
Check power to the ECU.
If you have an oscilloscope, check the ignition and injection output from the ECU for a pulsing signal.
Check that the ignition mode or injection mode is correct for the type of trigger. For example, if you have a
trigger system that does not provide a Home signal, then only Multipoint or Batch Fire fuel modes will
work.
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