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4
Vehicle Diagnostics
2. Review Results.
3.Return to DIAGNOSTIC MENU.
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BACK
.
I/M Monitors (Emisson Systems)
The I/M Monitors (Inspection / Maintenance) function is used to view
a snapshot of the operations for the Emission System on OBD II
vehicles since the Diagnostic Trouble Codes were cleared.
I/M Monitors is a very useful function. To guarantee no faults make sure
all monitors are “ok” or “n/a” and no DTC’s exist.
During normal driving conditions, the vehicle’s computer scans the
emission system. After a specific amount of drive time (each monitor
has specific driving conditions and time required), the computer’s
"monitors" will decide if the vehicles emission system is working
correctly or not as well as detecting out of range values. When the
"monitor’s" status is:
"ok" - vehicle was driven enough to complete the monitor.
"inc" (Incomplete) - vehicle was not driven enough to complete the
monitor.
"n/a" (Not Applicable) - vehicle does not support that monitor.
Some states MAY NOT require all monitors listed to be ready to pass
the emissions test. Check with state testing site for exact requirements.
All states will fail a vehicle that has the MIL Light lit at time of test.
Refer to the vehicles service manual for the drive cycle operation.
Depending on vehicle, disconnecting or a discharged battery may
erase trouble codes and clear monitor status. Clear Monitors by:
Erasing Codes.
Vehicle Computer Module losing power (on some vehicles.)
!!!!MIL is ON
MIL Lamp Should
be ON if
Engine is Running
Press BACK
to Exit
!!!!MIL is OFF
MIL Lamp Should
be OFF if
Engine is Running
Press BACK
to Exit
OR
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