Additional Tests
SYSTEM/ACTUATOR TESTS
39
An “instructional” screen displays. Prepare the vehicle for test as
directed:
- Start and idle the engine.
- Place the transmission in PARK.
2.
Choose
Yes
to continue.
A “status” screen displays while a vehicle status check is
performed.
The Select Test screen displays.
3.
Select
Normal
or
On
, as desired, then
press
ENTER
.
The Test Results screen displays.
The screen shows the values for
Cylinder 1 Contribution
through
Cylinder 6 Contribution
,
Cylinder
1 – 3 Contribution
,
Cylinder 4 – 6
Contribution
and
ECM Engine RPM
.
4.
If desired, choose
Reselect
to return to the Select Test screen, and
repeat step 3 to select a test mode.
5.
Choose
Finish
to return to the Special Functions menu.
EGR System Test
The EGR System Test function lets you perform an Exhaust Gas
Recirculation (EGR) system test.
1.
Select
EGR System Test
in the Special Functions menu, then press
ENTER
.
An “instructional” screen displays. Prepare the vehicle for test as
directed:
- Start and idle the engine.
2.
Choose
Yes
to continue.
A “status” screen displays while a
vehicle status check is performed.
The Select Flow Rate screen
displays.
3.
Select
Normal
,
Closed
,
Open
or the
desired flow rate (
100 g/s
,
200 g/s
,
300
g/s
), then press
ENTER
.
The Test Results screen displays.
The screen shows the current values for
MAP Vacuum
,
Engine
Speed
and
EGR Duty Cycle
.
4.
If desired, choose
Reselect
to return to the Select Flow Rate screen,
and repeat step 3 to select a new flow rate.