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Home >> Jeep >> 2013 >> Wrangler Sport, Automatic Trans >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> (Transmission Control Module (TCM) - Electrical Diagnostics) >> DTC Troubleshooting >> P1639-TCM Internal-Can 2 Ram Performance >> Diagnostic Test

Diagnostic Test

  1. TRANSMISSION CONTROL MODULE (TCM) 

    Repair 

    • Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM in accordance with the Service Information.
    • Perform the NAG1 TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .
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