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No Messages From EATX

NOTE: After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST  under VERIFICATION TESTS.
  1. Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, attempt to communicate with Transmission Control Module (TCM). If scan tool communicates with TCM, go to next step. If scan tool does not communicate with TCM, perform NO RESPONSE FROM TRANSMISSION CONTROL MODULE OR BUS +/- SIGNALS OPEN  test under COMMUNICATIONS SYSTEM.
  2. Using scan tool, clear DTCs. Turn ignition off. Turn ignition on for approximately one minute. Using scan tool, retrieve DTCs. If NO MESSAGES FROM EATX DTC resets, replace instrument cluster. If NO MESSAGES FROM EATX DTC does not reset, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See WIRING DIAGRAMS  . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.