B
98
Repair and Service Manual
FUEL SYSTEM
Read all of SAFETY and this section before attempting any procedure. Pay particular attention to Notices, Cautions, Warnings and Dangers.
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time. However, if the throttle-body/ECM assembly is
replaced, the hour count will be restarted from zero.
Fig. 23 Engine Hours Display
Active Faults may be cleared to determine when/if the
fault recurs under observation. Stored Faults cannot be
cleared.
Active Faults do not become Stored Faults until after a
key cycle or 60-minute inactivity timeout. For instance, if
during a run, Engine Running Lean and Limp Home Mode
faults are thrown, regardless of the number of instances
seen in the log, their occurrence will only increment the
Stored Fault counter once when the key is cycled.
Pedal Kill Check
The accelerator-pedal system contains a kill switch that
sends a signal to the ECM to shut off fuel when the pedal
is released. This provides better stop/start performance
and prevents accidental running when the pedal is up. If
the throttle hangs open for any reason, the engine will still
shut down when the pedal is released.
To test this system, follow this procedure:
1.
Ensure the neutral lockout is engaged, the key is in
the “ON” position, the software is connected, and
streaming is active.
2.
Navigate to the Diagnostics-> Trouble Codes sec-
tion, as shown.
Fig. 24 Trouble Codes Tab
3.
Note the condition of the “Kill Active” light, shown
directly under the Trouble Codes tab.
4.
With the pedal in the resting (“up”) position, the kill
indicator should display “Active”.
5.
When pedal moved away from the resting position,
the kill indicator should show “Not Active”. Warning: if
the key is on, the engine will start during this step!
Ensure the FNR selector is locked in Neutral and
area is safe.
Tests
Diagnostic Tests are available for troubleshooting the EFI
system. These can be accessed by navigating to Diag-
nostics->Tests
These are the three tests available:
•
Test Injector – Injector is pulsed 10 times over 11
seconds, unless manually turned off.
•
Test Ignition – Ignition is pulsed 10 times over 11 sec-
onds, unless manually turned off.
•
Test Fuel Pump Relay – This test runs for 20 sec-
onds, unless manually turned off.
RECOMMENDED FAULT TESTS
Ignition System
1.
Disconnect the two pin connection from the ignition
Coil. Turn the key to the ON position. Within 10 sec-
onds, measure the voltage between the terminal #2
and the battery ground. Voltage should measure the
same as the battery voltage.
2.
Disconnect the two pin connection from the ignition
coil. Measure for continuity between the terminal #2
at the ignition coil and the terminal #8 at the ECM.
