Service manual

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8/14/02
35
The throttle position sensor minimum and
maximum values must be set using the CDMT
anytime the throttle body is serviced (removed,
replaced, installed). It also must be set if the ECU
operating code is updated. Set the throttle position
with the engine off. When the values are set using
the tool, the minimum and maximum value actually
read into the software by the technician are checked
against a range. If any read value is out of range, the
software will report it.
N
OTE :
The “TPS Sensor Closed (volts)” and the “TPS
Sensor open (volts)” are displayed in the CDMT
main screen anytime a engine calibration file is
open or received from the ECU.
1. To set the throttle position, start by making sure
that the idle adjustment screw is backed off
completely. The throttle plate should be
completely shut before you continue.
Double check the throttle bellcrank after backing
the idle adjustment screw off; any slight tension in
the throttle cable can hold the plate open. Confirm
that it is closed all the way by rotating the throttle
bellcrank with your hand - closing it firmly.
N
OTE :
When shutting the throttle body plate to set the
minimum value, avoid backing the adjustment
screw out too far that it falls out of the stop plate.
2. Make sure the interface cable is connected to
the computer and vehicle securely.
3. Open the Cannondale Diagnostic and
Maintenance Tool software on your PC.
4. Power-up the vehicle engine management
system.
5. An engine calibration file must be open in the
CDMT main window to continue. Use the OPEN
Calibration File (saved) or use the RECEIVE
Calibration File (from ECU) button to receive the
calibration file that is currently stored in the vehi-
cle ECU.
6. Click the SET Throttle Position button. The Cali-
brate Throttle window will display. When the win-
dow displays the closed voltage (minimum) and
open voltage (maximum) numeric values shown
are the values of the current engine calibration
file.
Again, make sure the throttle plate is completely
closed and click the Read Closed Voltage button.
You should see a change in the numeric value to
the right of the button. The change is the mini-
mum voltage value read from the vehicle TPS
sensor when completely closed. The value can
approach zero, but should be within the typical
range indicated in the window.
Next, have an assistant hold the throttle lever fully
open. While the lever is held in the “wide open
throttle” position, click the Read WOT Voltage
button. You should see a change in the numeric
value to the right of the button. Tell your assistant
to release the throttle lever.
Now, both values have been read from the vehicle
TPS sensor. You have two options to consider; go