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Home >> Fiat >> 2014 >> 500L Easy, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (DTCS P1CC0-00 To U1508-00 - C635 DDCT Automatic Transmission - 500L) >> Diagnosis And Testing >> P284D-00-Shift Fork 1 UNREQUESTED Movement >> Theory Of Operation

Theory Of Operation

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This diagnostic checks for the engagement of 1st or 3rd gears while the TCM is not commanding their engagement. The engagement is determined based upon the output value of the gear shift 1st-3rd position sensor.