Additional Tests
SYSTEM/ACTUATOR TESTS
57
1.
Select
Throttle Sweep
in the ECM Special Functions menu, then
press
ENTER
.
An “instructional” screen displays. Prepare the vehicle for test as
directed:
- Turn the ignition on. DO NOT start the engine.
2.
Choose
Next
to continue.
The Throttle Sweep test screen
displays.
The screen shows the throttle
Commanded State
and current
values for the
TAC Motor
Command
,
TP Sensor 1
,
TP
Sensor 2
,
TAC Motor
and
TP
Sensors 1 and 2
.
3.
Choose
Start
to begin the test and observe results on the display.
4.
Choose
Stop
to end the test before wide open throttle is reached
and return the throttle to the null (idle) state.
5.
Choose
Exit
to return to the ECM Special Functions menu.
Reset Idle Learn
The Reset Idle Learn function resets the idle learn values for TP
sensors 1 and 2.
1.
Select
Reset Idle Learn
in the ECM Special Functions menu, then
press
ENTER
.
A “status” message shows while the
tool links with the control unit. When
data is returned from the control unit,
the Reset Idle Learn screen
displays.
The screen shows the
TP Sensor 1
Learned Minimum
and
TP Sensor
2 Learned Minimum
values.
2.
Choose
Reset
to reset the idle learn
values for TP sensors 1 and 2.
A status screen displays while the procedure is in progress.
When the procedure is completed, the message “Reset Idle
Learn Complete” displays.
3.
Choose
Exit
to return to the ECM Special Functions menu.
EGR Solenoid
The EGR Solenoid function lets you increase or decrease solenoid
position.