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Home >> Mercury >> 2009 >> Mariner Base, 2.5 7, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 128 (Automatic Transmission) >> Diagnostic Tests >> Transmission Drive Cycle Test >> After On-Board Diagnostic (OBD)

After On-Board Diagnostic (OBD)

WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: The vehicle wiring harness, PCM and non-transmission sensors may affect transmission operations. Repair these concerns first.

After the On-Board Diagnostic (OBD) tests are completed, repair all DTCs.

Begin with non-transmission related DTCs, then repair any transmission related DTCs. Use the DTC Chart for information on condition and symptoms. This chart will be helpful in referring to the correct article(s) and aids in diagnosing internal transmission concerns and external non-transmission inputs. The pinpoint tests are used in diagnosing transmission electrical concerns. Make sure that the vehicle wiring harness and the PCM are diagnosed as well. The INTRODUCTION - GASOLINE ENGINES article will aid in diagnosing non-transmission electronic components.

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