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P0602-CONTROL MODULE PROGRAMMING ERROR/NOT PROGRAMMED (CONTINUED) For the Transmission circuit diagram (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - NAG1 - SCHE- For a complete wiring diagram Refer to Section 8W Theory of Operation The Transmission Control Module (TCM) performs various internal tests to verify proper controller operation. If the • When Monitored: • Set Condition: Possible Causes CONTROLLER NOT CODED TRANSMISSION CONTROL MODULE Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMIS- Diagnostic Test 1. CHECK IF TCM IS FLASHABLE NOTE: Controller is programmed with generic software and will not allow the correct vehicle Powertrain Select Use Controller Part Number under the Flash Tab. Flash the controller with the correct software. Were you able to update (flash) the controller successfully? Yes >> Test Complete. Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1. No >> Replace the TCM per the Service Information. Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/TRANSMISSION CONTROL MODULE for the appropriate service procedures. Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1. 21 - 470 AUTOMATIC TRANSMISSION NAG1 - ELECTRICAL DIAGNOSTICS WK |