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Home >> Jeep >> 2017 >> Wrangler Sahara, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 57 (Emissions Control) >> On-Board Diagnostics >> Operation >> Monitor Preliminary Checks:

Monitor Preliminary Checks:

WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
  1. Plug a scan tool into the vehicle's Data Link Connector (DLC).
  2. Turn the ignition, KEY ON - ENGINE OFF. Watch for the MIL lamp illumination during the bulb check. MIL lamp must illuminate, if not, repair MIL lamp.
  3. Using a scan tool check for Powertrain related DTCs.

Using the scan tool check the CARB Readiness Status.

Do all the CARB Readiness Status Locations read YES?

NOTE:

Only the monitors, which are not YES in the CARB Readiness Status, need to be completed. Specific criteria need to be met for each monitor. The most efficient order to run the monitors has been outlined below, including suggestions to aid the process.