Battery Voltage Correction Mode
The ECM can compensate in order to maintain
acceptable vehicle driveability when the ECM sees a low
battery voltage condition. The ECM compensates by
performing the following functions:
• Increasing the injector pulse width in order to maintain
the proper amount of fuel being delivered
• Increasing the idle speed to increase the generator
output
Fuel Shut-Off Mode
The ECM has the ability to completely turn OFF all of the
injectors or selectively turn OFF some of the injectors
when certain conditions are met. These fuel shut-off
modes allow the ECM to protect the engine from
damage and also to improve the vehicles driveability.
The ECM will disable all of the six injectors under the
following conditions:
• Ignition OFF—Prevents engine run-on
• Ignition ON but no CKP signal—Prevents flooding or
backfiring
• A high engine speed—Above the red line
• A high vehicle speed—Above the rated tire speed
• Closed throttle coast down—Reduces the emissions
and increases engine braking.
The ECM will selectively disable the injectors under the
following conditions:
• The torque management enabled—Transmission
shifts or abusive maneuvers.
• The traction control enabled—In conjunction with the
front brakes applying
Fuel System:
1G-7