Installation manual

7-7
90-898305
Guardian System Activation
Condition Result
Engine Overheat Engine power level can be reduced to
any percentage down to an idle
speed, if overheat condi-tion persists.
Air Compressor Overheat 2000 Model – engine power level can
be reduced to any percentage down
to an idle speed, if over-heat
condition persists. 2001 Model – no
power reduced.
Block Water Pressure Low Engine power level can be reduced to
any percentage down to a fast idle, if
condition persists.
Throttle Position Sensor Failure If the throttle position sensor fails or
becomes disconnected, power will be
limited to a maximum of
approximately 4500 rpm. When the
TPS is in the fail mode, the ECM will
use the MAP sensor for a reference
to determine fuel calibration.
Temperature Sensor (cylinder head
and air compressor) Failure
If a temperature sensor should fail or
become disconnected, power will be
reduced by 25%.
Battery Voltage (too high or too low) Battery voltage greater than 16.5
volts or less than 10.5 volts will result
in engine output power being
reduced. The higher or lower the
voltage is outside of these
parameters, the greater the
percentage of power reduction. In an
extreme case, power could be
reduced to idle speed.
Oil Pump Failure If the oil pump fails or an open circuit
occurs between the pump and the
ECM, engine power will be reduced to
idle.