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Test F: Incorrect Key Code From Ignition Key Transponder

WARNING: This page is about a different car, the 2002 Lincoln Navigator, 2002 Ford Expedition, 2001 Lincoln Navigator, and 2001 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Large metallic objects on the same key ring with Passive Anti-Theft System (PATS) ignition key may cause vehicle starting problems and record DTCs under certain conditions. If a fault cannot be identified, examine key ring for such objects. If objects are found that could interfere with PATS operation, turn ignition switch to LOCK position and restart engine with all metallic objects held away from ignition key. Encoded key must be an approved key by Ford, Rotunda, Ilco, Curtis or Strattec are approved by Ford for use with PATS.
  1. Connect New Generation Star (NGS) tester to data link connector. Retrieve instrument cluster DTCs. If DTC B1601 is retrieved, go to next step. If DTC B1601 is not retrieved, system is okay. Check all encoded keys to ensure that they are programmed and perform self-test. See SELF-DIAGNOSTIC SYSTEM .
  2. Using NGS tester, monitor PID NUMKEYS. If PID NUMKEYS display any number other than "8", go to next step. If PID NUMKEYS display is "8", erase and reprogram all keys. See ERASE ALL KEYS & PROGRAM 2 KEYS  under PROGRAMMING. Perform self-test. See SELF-DIAGNOSTIC SYSTEM .
  3. Verify that there are at least 2 programmed encoded keys available. If there are at least 2 programmed encoded keys available, go to next step. If there are not at least 2 programmed encoded keys available, cut and program NEW key(s). See ERASE ALL KEYS & PROGRAM 2 KEYS  under PROGRAMMING, then proceed to next step.
  4. Turn ignition switch to LOCK position. Start vehicle with first encoded key. Turn ignition switch to LOCK position. Start vehicle with second encoded key. If vehicle starts with both keys, system is okay. If vehicle does not start with both keys, go to next step.
  5. Turn ignition switch to RUN position. Using NGS tester, retrieve and record instrument cluster DTCs. Clear DTCs. Perform instrument cluster self-test using both keys used in step 4)  . If DTC B1601 is not retrieved, system is okay. If other DTCs are retrieved, diagnose and repair those DTCs before proceeding. See HYBRID ELECTRONIC CLUSTER DIAGNOSTIC TROUBLE CODE INDEX  table under SYSTEM TESTS. If DTC B1601 is retrieved, replace instrument cluster. See INSTRUMENT CLUSTER  under REMOVAL & INSTALLATION.
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