MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-25
22
83
Catalyst Monitor Bank 2
Frequency ratio between
Front- and Rear-Oxygen
Sensors
ECM monitors the
deterioration of catalyst at
left bank side by the output
frequency ratio between left
bank heated oxygen sensor
(front) and left bank heated
oxygen sensor (rear).
× 0.0039
31
84
EGR Monitor
Difference of manifold
pressure before and after
EGR activation
ECM monitors the
operation of EGR system
by the pressure difference
of intake manifold between
before and after
introduction of EGR using
the manifold absolute
pressure sensor.
× 0.0117 kPa
39
85
EVAP Monitor (Cap off)
Pressure drop during
de-pressurizing
ECM monitors the leak of
fuel evaporation gas by
checking whether the
pressure can be reduced
(the amount of pressure
reduction) using the fuel
tank differential pressure
sensor after sealing the fuel
tank and the fuel line.
× 0.0117 kPa
3B
85
EVAP Monitor (0.040")
Pressure rise during airtight
condition
After ECM vacuumizes the
fuel tank and the fuel line
and then the specified time
is passed, ECM monitors
the leak of fuel evaporation
gas through the fuel tank
differential pressure sensor
to check the reduction of
vacuum in the fuel tank.
× 0.0117 kPa
3C
85
EVAP Monitor (0.020")
Pressure rise during airtight
condition
After ECM vacuumizes the
fuel tank and the fuel line
and then the specified time
is passed, ECM monitors
the leak of fuel evaporation
gas through the fuel tank
differential pressure sensor
to check the reduction of
vacuum in the fuel tank.
× 0.0117 kPa
41
86
Oxygen Sensor Heater
Monitor Bank 1
− Sensor 1
Heater Monitoring Current
ECM checks the amperage
of the right bank heated
oxygen sensor (front)
heater.
× 0.001 A
ON-BOARD
DIAGNOSTIC
MONITOR ID
STANDARDIZED /
MANUFACTURER
DEFIND TEST ID
MONITORING ITEM
SIMPLE TECHNICAL DESCRIPTION CONVERSION
COEFFICIENT IN USING
GENERAL SCAN TOOL