Haltech IG5 - Manual (Page 37)

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CHAPTER 5 STARTING THE ENGINE
There are a few things that need to be done before starting the engine. Make sure that the
ECU is powered (ignition on) and the Haltech Software is Online. Go to the Engine Data
Page to check that the ECU is communicating properly, and that all sensors are reading
correctly. Check again that the Identification and the Ignition Set-up are correct.
5.1 Calibrate the Throttle Position Sensor
The throttle sensor must be calibrated so that the ECU knows the start and stop positions of
the sensor. Choose the "calibrate throttle" option from the options menu and follow the
instructions on the screen. Set the idle throttle opening using the idle adjust screw. If the
required opening for idle is not known, make an estimate but keep in mind that this may be
the reason for poor idle later on, and further adjustment may be needed.
5.2 Check the trigger signal
It is a good idea to check that the IG5 is receiving a reliable trigger signal by cranking the
engine over on the starter. The rpm displayed on the engine data page should read about 100
to 300 rpm. If the engine speed is zero or is erratic then refer to the section in Chapter 1
[1.3.11] regarding trigger setup. If the trigger is operating correctly then continue.
5.3 Check the Base Timing
The IG5 uses the trigger input signal taken from either the cam angle sensor or flywheel
sensor for its base timing. To ensure that this base timing is set correctly the IG5 has a
TIMING CHECK FLAG which, when set to “on” will cause the IG5 to fire the ignition at
10° before TDC regardless of engine speed or load, if the trigger angle setting is correct.
To enable this flag, press
ƒσ ƒσ ƒσ ƒσ
from the Sub-Menu select the Ignition Setup. Using the arrow
keys move to the Timing Lock option. If it reads Timing Check On, the flag is enabled. If it
reads Timing Check Off, then the flag is disabled. The flag is toggled by pressing
♥ ♥ ♥ ♥
. If the
Timing Check is on, the ECU will lock the timing to where it believes 10° advance to be.
Check the base timing by cranking the engine with the Timing Check on. Use an ignition
timing light to check that the ignition timing is set to 10° BTDC. See the workshop manual
for your engine for details on checking ignition timing and the use of a timing light. It is
suggested that you remove the fuse for the fuel pump and do the timing check while cranking.
This will require two people - one to crank the engine and one to operate the timing light. It
can be difficult to check the timing accurately at cranking speeds. Removing the spark plugs
will help the engine to rotate at an even speed. Once you have checked the timing at crank,
leave the Timing Check on.
If the timing light does not show 10° BTDC the ECU is not being triggered at the same angle
as that specified in the Trigger Degrees field in the Ignition Setup. If the timing is out go