Additional Tests
SYSTEM/ACTUATOR TESTS
For technical questions, please call 1-888-866-5797.
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A fuel pressure gauge (purchased separately) is required to
perform this function.
1.
Select
Fuel Injector Balance
in the ECM Special Functions menu,
then press
ENTER
.
n
An “instructional” screen displays. Prepare the vehicle for test as
directed:
Choose
Next
as necessary to scroll the “instructional”
screen.
- Ensure all fuel lines are connected.
- Connect the fuel pressure gauge to the fuel line.
n
The Select Injector screen displays.
2.
Select the injector you wish to test, then press
ENTER
.
n
The Injector Pressure screen
displays.
3.
Note and record the fuel pressure
reading for the selected injector, then
choose
Pulse Injector
to pulse the
injector.
n
The Injector Pressure Drop screen
displays.
4.
Note and record the fuel pressure drop
for the selected injector, then choose
Continue
to return to the Select Injector
screen.
n
Repeat steps 2 through 4 for
additional injectors, as desired.
5.
Choose
Exit
to return to the ECM
Special Functions menu.
Cylinder Power Balance
The Cylinder Power Balance function lets you disable a selected fuel
injector to note the resulting power drop.
1.
Select
Cylinder Power Balance
in the ECM Special Functions menu,
then press
ENTER
.
n
An “instructional” screen displays. Prepare the vehicle for test as
directed:
- Set the parking brake.
- Block all drive wheels.
- Start and idle the engine.
- Make sure the A/C system is off.
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