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#3240 - 12/31/09 04:29 PM C6 drive cycle relearn procedure  
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COMPONENT MONITOR DRIVE CYCLE INSTRUCTIONS

* Do not turn off the ignition switch during the test procedure.
* All Readiness codes are cleared when the battery is disconnected or when the ECM/PCM is cleared with the Scan Tool.
* This drive cycle can be used to determine if the Readiness code for this Monitor will run and complete, and if the MIL will remain off after the vehicle is driven.
* Operating Range: Whenever a range of values is provided, try to operate the vehicle in the middle of the range. For example, if the vehicle speed range is from 45-65 mph, operate the vehicle at as close as possible to 55 mph. Or if range for Short Term fuel trim is -20 to +20%; try to operate the engine at 0%.
* Scan Tool Data: There are certain Parameter Identification (PID) values that must be within range before this Monitor will "run". It can be helpful to pull up those PID items on the Scan Tool so an assistant can view them during testing.
* The Readiness code for this Monitor defaults to "continuous" or "monitoring" because this Monitor runs continuously when the engine is cranking or running.

COMPONENT MONITOR PRETEST CONDITIONS

* MIL is off.
* No Emission related DTC's are present.
* Accessories turned off (A/C, fan motor, headlights and rear window defroster).
* Battery voltage from 10-18v.
* Engine running at Idle and/or Cruise speed.

TEST PROCEDURE

1. Connect the Scan Tool to the data link connector (DLC). Use the Scan Tool to clear any stored DTC's and to reset the Onboard Diagnostic Monitors.
2. Start the engine and allow it run for 5 minutes.
3. Accelerate at part-throttle to Cruise speed. Maintain that speed for 2-3 minutes. Decelerate to 0 mph and allow the engine to idle. Bring the vehicle to a stop in a safe place, but do not turn off the ignition key.
4. Check for any diagnostic trouble codes (DTC's) in memory. If any DTC's are set, refer to the appropriate trouble code chart to make the repair. If no DTC's are set, the test is done. Return to the service bay and turn off the ignition key.

Attached Files C6drivecycle.jpg

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#3242 - 01/04/10 04:36 PM Re: C6 drive cycle relearn procedure [Re: teamzr1]  
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teamzr1 Offline
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teamzr1  Offline
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Full drive cycle without using a scanner for C6s

General Motors Driving Cycle

A complete driving cycle should perform diagnostics on all systems. A complete driving cycle can be done in under fifteen minutes.

To perform an OBDII Driving cycle do the following:

1. Cold Start. In order to be classified as a cold start the engine coolant temperature must be below 50C (122F) and within 6C (11F) of the ambient air temperature at startup.
Do not leave the key on prior to the cold start or the heated oxygen sensor diagnostic may not run.

2. Idle. The engine must be run for two and a half minutes with the air conditioner on and rear defroster on. The more electrical load you can apply the better. This will test the O2 heater, Passive Air, Purge "No Flow", Misfire and if closed loop is achieved, Fuel Trim.

3. Accelerate. Turn off the air conditioner and all the other loads and apply half throttle until 88km/hr (55mph) is reached. During this time the Misfire, Fuel Trim, and Purge Flow diagnostics will be performed.

4. Hold Steady Speed. Hold a steady speed of 88km/hr (55mph) for 3 minutes. During this time the O2 response, air Intrusive, EGR, Purge, Misfire, and Fuel Trim diagnostics will be performed.

5. Decelerate. Let off the accelerator pedal. Do not shift, touch the brake or clutch. It is important to let the vehicle coast along gradually slowing down to 32km/hr (20 mph). During this time the EGR, Purge and Fuel Trim diagnostics will be performed.

6. Accelerate. Accelerate at 3/4 throttle until 88-96 km/hr (55-60mph). This will perform the same diagnostics as in step 3.

7. Hold Steady Speed. Hold a steady speed of 88km/hr (55mph) for five minutes. During this time, in addition to the diagnostics performed in step 4, the catalyst monitor diagnostics will be performed. If the catalyst is marginal or the battery has been disconnected, it may take 5 complete driving cycles to determine the state of the catalyst.

8. Decelerate. This will perform the same diagnostics as in step 5. Again, don't press the clutch or brakes or shift gears.


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