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Correcting No Response Condition

NOTE: For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.5L article in ENGINE PERFORMANCE. After each repair, perform TEST VER-1  .
  1. If ignition is not on when NO RESPONSE message is displayed, turn ignition on to get a response. If ignition is on when NO RESPONSE message is displayed, turn ignition off. Go to next step.
  2. Disconnect scan tool from Data Link Connector (DLC). Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Using an external ohmmeter, check resistance between DLC terminal No. 5 (Pink wire) and chassis ground. If resistance is less than 5 ohms, repair short to ground in Pink wire. If resistance is more than 5 ohms, go to next step.
  3. Check resistance between DLC terminal No. 1 (Light Green wire) and chassis ground. If resistance is less than 5 ohms, repair short to ground in Light Green wire. If resistance is more than 5 ohms, go to next step.
  4. Connect a jumper wire between DLC terminal No. 5 (Pink wire) and chassis ground. Using scan tool in ohmmeter mode, check resistance of PCM connector terminal No. 25 (Pink wire). If resistance is more than 5 ohms, repair open Pink wire. If resistance is less than 5 ohms, go to next step.
  5. Disconnect jumper wire. Connect jumper wire between DLC connector terminal No. 1 (Light Green wire) and ground. Using scan tool, check resistance of PCM connector terminal No. 45 (Light Green wire). If resistance is more than 5 ohms, repair open Light Green wire. If resistance is less than 5 ohms, go to next step.
  6. Connect scan tool to a functional DLC on another vehicle. Turn ignition on. Using scan tool, attempt to read trouble codes. If scan tool does not display NO RESPONSE, replace initial vehicle's PCM. If scan tool displays NO RESPONSE, substitute another scan tool cartridge. Go to next step.
  7. Using scan tool, attempt to read trouble codes. If scan tool does not display NO RESPONSE, replace scan tool cartridge. If scan tool displays NO RESPONSE, substitute another scan tool adapter cable. Using scan tool, attempt to read trouble codes. If scan tool does not display NO RESPONSE, replace scan tool adapter cable. If scan tool displays NO RESPONSE, repair or replace scan tool.
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