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U0103-LOST COMMUNICATION WITH ELECTRIC GEAR SHIFT MODULE (CONTINUED) 2. CHECK IF THE DTC IS CURRENT NOTE: When the Transmission Control Module (TCM) detects and stores a DTC, the TCM also stores the With the scan tool, erase Transmission DTC’s. Using the Environmental Data recorded earlier, try to duplicate the conditions in which the DTC originally set. It may With the scan tool, read Transmission DTC’s. Did the DTC U0100-LOST COMMUNICATION WITH ECM/PCM reset? Yes >> Using the schematics as a guide, check the Transmission Control Module (TCM) pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1. No >> Go To 3 3. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wiring and connectors while checking for any possible open or shorted circuits. Check for any Service Information Tune-ups or Technical Service Bulletins that may apply. Were there any problems found? Yes >> Repair as necessary. Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1. No >> Test Complete. 21 - 614 AUTOMATIC TRANSMISSION NAG1 - ELECTRICAL DIAGNOSTICS WK |