The drive cycle that the dealer gave you is not exactly correct. Even if you drove the drive cycle and the ambient temperature and the engine coolant temperature are not sufficiently separated on a cold soak start or overnight start the system will run the test correctly. Listed below is some of setting criteria to get the monitor test to pass. Bot***** *****ne is you just need to drive the pattern correctly. If it still will not pass there is a remote chance that could be an issue in the engine control computer. I would do this without the device plugged into the connector for the direct link. Also I've attached a graph showing the actual pattern that the computer is looking for it doesn't even require driving it simply a matter of the ignition off idling 3000 RPM rise and the allowing the engine to continue to idle. For the monitor or even have ready test it doesn't require driving. The other monitor test if they're not passing do have their own specific drive pattern. Hopefully this makes sense. Let me know how goes.
3. EVAP MONITOR (VACUUM PRESSURE MONITOR)
A cold soak must be performed prior to conducting the drive pattern to complete the internal pressure
(a) Cold Soak Preconditions
The monitor will not run unless:
_ The MIL is OFF.
_ Fuel level is approximately 1/2 to 3/4 full.
_ Altitude is 7,800 feet (2,400 m) or less.
(b) Cold Soak Procedure
Let vehicle cold soak for 8 hours or until the difference between IAT and ECT is less than 7°C (13°F).
_ Scenario 1
ECT = 24°C (75°F)
IAT = 16°C (60°F)
Difference between ECT and IAT is 8°C (15°F).
→ The monitor will not run because difference between ECT and IAT is greater than 7°C (13°F).
_ Scenario 2
ECT = 21°C (70°F)
IAT = 20°C (68°F)
Difference between ECT and IAT is 1°C (2°F).
→ The monitor will run because difference between ECT and IAT is less than 7°C (13°F).
IG SW off
Soak 15 to 50 minutes
(When the readiness code or diagnostic code
is set, this test is completed.)
Warm up time