Test D: Invalid Key Code Format From Ignition Key Transponder (DTC B1602)

NOTE: Large metallic objects, a second PATS ignition key, or devices such as electronic credit cards on the same key ring may cause vehicle starting problem and possibly set this code. Ensure customers encoded ignition key is an approved Ford encoded ignition key. Encoded keys from Rotunda, Ilco, and Strattec are also approved keys.

Turn ignition switch to OFF position. Connect New Generation Star (NGS) tester. Turn ignition switch to RUN position. Perform PCM self-test. Retrieve and record continuous DTCs. Clear continuous DTCs. If DTC B1602 is retrieved, go to next step. If DTC B1602 is not retrieved, system is operating properly. Check all encoded ignition keys, by starting vehicle, to verify all encoded ignition keys are programmed.
Obtain NEW encoded ignition key. Program NEW encoded ignition key. See ERASE ALL KEYS & PROGRAM 2 KEYS under PROGRAMMING. Turn ignition switch to RUN position. Using NGS tester, perform PCM self-test. If DTC B1602 is retrieved, go to next step. If DTC B1602 is not retrieved, system is operating properly. If any other DTCs are retrieved, perform appropriate DTC test. See POWERTRAIN CONTROL MODULE (PCM) DTC INDEX table under SELF-DIAGNOSTIC SYSTEM.
Turn ignition switch to OFF position. Replace Passive Anti-Theft System (PATS) transceiver module. See PASSIVE ANTI-THEFT SYSTEM (PATS) TRANSCEIVER MODULE under REMOVAL & INSTALLATION. Turn ignition switch to RUN position. Using NGS tester, perform PCM self-test. If any DTCs are retrieved, perform appropriate DTC test. See POWERTRAIN CONTROL MODULE (PCM) DTC INDEX table under SELF-DIAGNOSTIC SYSTEM. If no DTCs are retrieved, system is properly at this time.