Haltech IG5 User Manual

Page 28

Trigger Degrees

This field tells the ECU where to expect the Main Trigger to occur. This field is very
important for the correct operation of the ignition. If it is incorrect, the spark advance
will also be incorrect, which could lead to engine damage. The ECU needs to receive
an input trigger at a fixed engine angle Before Top Dead Center (BTDC) for each
spark. This trigger may be set between 60° and 100° BTDC. See Chapter 5 for
details.

Lock Timing at 10 Degrees

This field is used for testing the trigger input. It allows the timing to be locked at ten
degrees regardless of the engine speed and ignores the ignition map settings. This
feature is further discussed in Appendix C

Trigger Edge

This field determines whether the IG5 is to trigger on a rising or a falling edge. Refer
to Appendix C - Trigger Interface for details on how to determine this setting. If a
Reluctor Adaptor is being used, this field should be set to Falling.

Output Type

This field is used to determine how the ignition output signal is to be defined.
Constant Duty should only be used with the Bosch type Haltech Ignition Module or
other “intelligent” igniters and special after market systems that perform dwell control.
Constant Charge may be selected if the igniter operates simply as a switch (ie a
“dumb” igniter) and requires a dwell signal.

WARNING:

INCORRECTLY SETTING THIS FIELD WILL CAUSE FAULTY

OPERATION AND MAY BURN OUT THE IGNITER(S). DAMAGE

CAUSED BY INCORRECT SETTING WILL NOT BE REGARDED AS

WARRANTY.

Coil Charge Time

Only required if Constant Charge selected as Output Type. This is the time require to
charge the coil fully, or until the igniter’s current limit is reached, typically 4-5 ms.
Refer to Appendix B for additional information.

Output Edge

The Output Edge should be falling with a 30% switch when using a Bosch igniter (the
EB023 supplied by Haltech). This is the default setting. If you are using any other
igniter, refer to Appendix B for details on how to set this field for the igniter used.

Trigger Type

This field defines the trigger pattern the ECU will see coming from the crank or cam
angle sensors. The IG5 currently supports the following trigger types:
Standard This trigger pattern sends one trigger for each spark event. For example a
V8 has 4 firing strokes for each crank revolution, for this engine the ECU would
expect to see 4 trigger events for each crank revolution or 8 events for each cam
revolution.