MAC TOOLS MDT 10 Operator's Manual page 87

Drive Cycle
The OBDII system has a series of systems that run self-tests. These systems or components have to be made
ready either by simply turning on the ignition or by manipulating the system in some manner. This is called
Drive Cycle. Drive cycle information is listed for continuous and non-continuous monitors.
1. Select Drvice Cycle from the Diagnostic Information screen.
2. Scroll through the list until the desired monitor or drive cycle is found.
3. Select the desired drive cycle and follow the instructions.
Oil Light Reset
On newer vehicles, the oil light reset procedure will indicate how the oil life information can be reset after an
oil change.
1. Select Oil Light Reset from the Diagnostic Information screen.
2. Select Oil Light Reset from the Diagnostic Information menu screen.
800.MACTOOLS
ss02511
Current
Drive Cycle
1 3 5
2 4 R
2003
A/C SYSTEM REFRIGERANT
GMC
MONITOR
CATALYST MONITOR
COMPREHENSIVE COMPONENT
MONITOR
EGR SYSTEM MONITOR
EVAP SYSTEM MONITOR
FUEL SYSTEM MONITOR
FULL DRIVE CYCLE
MISFIRE MONITOR
O2 SENSOR HEATER MONITOR
O2 SENSOR MONITOR
ss02512
Current
Oil Light Reset
2003
Oil Light Reset Procedures
GMC
1) Turn the ignition key to the RUN position.
2) Fully push and release the accelerator pedal 3 times within 5 seconds.
3) If the CHANGE OIL SOON light flashes, the system is resetting.
4) Turn the key to OFF.
5) Start the vehicle.
6) The oil life will change to 100%
7) If the Change Oil Soon light comes back on, the system has not reset. Repeat the procedure.
1) Cold start engine coolant temperature < 50 degrees Celsius, with air conditioning &
rear defrost on, idle 2.5 minutes in drive. Before procedding turn accessories off.
2) Acceleration to 55 miles per hour, 1/2 throttle, air conditioning off.
3) 3 minutes steady state cruise 55 & 60 miles per hour.
4) Deceleration to 20 miles per hour (clutch out) no brake.
5) Acceleration at 3/4 throttle to 55-60 miles per hour, then steady state cruise for 5
minutes.
6) Deceleration no brake, end of cycle.
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