DTC B1601: Incorrect Key Code From Ignition Key

TRANSPONDER

1. Retrieve DTCs  Ensure ignition is off. Using NGS tester, retrieve and document continuous DTCs. Clear continuous DTCs and perform PATS On-Demand Self-Test. If DTC B1601 is retrieved, go to next step. If DTC B1601 is not retrieved, system is operating properly. Check all other customer encoded ignition keys to ensure they are programmed.
2. Check PATS PID #OFKEYS  Using NGS tester, monitor PATS PID #OFKEYS. If PATS PID #OFKEYS does not indicate 8 encoded ignition keys programmed, go to next step. If PATS PID #OFKEYS indicates 8 encoded ignition keys programmed, erase and reprogram key codes. See KEY PROGRAMMING - WITHOUT PROGRAMMED KEYS  under SERVICE PROCEDURES. Clear DTCs and retest system operation.
3. Check Number Of Programmed Encoded Ignition Keys Available  Verify that 2 programmed encoded ignition keys are available with vehicle. If 2 programmed encoded ignition keys are available with vehicle, go to next step. If 2 programmed encoded ignition keys are not available with vehicle, obtain 2 NEW encoded ignition keys. Program NEW encoded ignition keys and go to step 5). See KEY PROGRAMMING - WITHOUT PROGRAMMED KEY  under SERVICE PROCEDURES.
4. Check PATS PID SPARE_KY  Using NGS tester, monitor PATS PID SPARE_KY. If PATS PID SPARE_KY indicates YES, perform KEY PROGRAMMING - WITH PROGRAMMED KEY  under SERVICE PROCEDURES. Retest system operation. If PATS PID SPARE_KY does not indicate YES, perform KEY PROGRAMMING - SPARE KEY PROGRAMMING SWITCH  under SERVICE PROCEDURES to enable PATS PID SPARE_KY to YES. Retest system operation.
5. Check Encoded Ignition Keys For Proper Operation  Turn ignition off. Turn ignition to RUN position for 3 seconds using first encoded ignition key. Turn ignition off and remove first encoded ignition key. Turn ignition to RUN position for 3 seconds using second encoded ignition key. Start vehicle using both encoded ignition key. If vehicle does not start using both encoded ignition keys, go to next step. If vehicle starts using both encoded ignition keys, system is operating properly. If additional spare encoded ignition keys need to be programmed, perform KEY PROGRAMMING - SPARE KEY PROGRAMMING SWITCH  under SERVICE PROCEDURES.
6. Check For DTC B1601  Using NGS tester, retrieve and document continuous DTCs. Clear continuous DTCs and perform PATS On-Demand Self-Test. If DTC B1601 is retrieved, replace PATS module. Clear DTCs and retest system operation. If no DTCs are retrieved, system is operating properly. If other DTCs are retrieved, perform appropriate DTC test for trouble code received.