AEM 30-6053 Series 2 Plug & Play EMS - Manual (Page 10)

Page 10 of 21
h) NOTE: the throttle range on this vehicle is set differently from other EMS applications!
Disconnect the DBW connector on the throttle, then perform the procedure as follows
by holding the throttle open and closed manually at the throttle plate.
Set the throttle range: Select Wizards>>Set Throttle Range. When finished, check
that the ‘Throttle’ channel never indicates less than 3.2% or greater than 99.8% (must
be 2.2% or more since the DBW throttle will close slightly when the engine starts),
this is considered a sensor error and may cause some functions including idle
feedback and acceleration fuel to operate incorrectly. Since this application uses the
original drive-by-wire system, it is highly recommended that after calibration is
complete, the throttle is rechecked to ensure that the minimum throttle never causes
the Error Throttle channel to turn on. This would happen when the vehicle is off and
the key is turned on.
4) Ready to begin tuning the vehicle.
a) Before starting the engine, verify that the fuel pump runs for a couple of seconds
when the key is turned on and there is sufficient pressure at the fuel rail.
If a MAP sensor is installed, check that the Engine Load indicates something near
atmospheric pressure (approximately 101kPa or 0 PSI at sea level) with the key on
and engine off. Press the throttle and verify that the ‘Throttle’ channel responds but
the Engine Load channel continues to measure atmospheric pressure correctly.
b) Start the engine and make whatever adjustments may be needed to sustain a safe
and reasonably smooth idle. Verify the ignition timing: Select Wizards>>Ignition
Timing Sync
from the pull-down menu. Click the ‘Lock Ignition Timing’ checkbox
and set the timing to a safe and convenient value (10 degrees BTDC for instance).
Remove the cylinder 1 ignition coil (closest to front of engine), add a spark plug wire
between the ignition coil and the spark plug and place the timing light pickup on the
added spark plug wire. Use a timing light to compare the physical timing numbers to
the timing value you selected. Use the Sync Adjustment Increase/Decrease buttons
to make the physical reading match the timing number you selected.
Crankshaft timing marks are not labeled for some vehicles. Consult the factory
service manual for more information. The diagram below shows labels for the original
timing marks. “A” points to the timing indicator and “B” points to the red mark that is
located 5° before top dead center.