DTC B1601: Unprogrammed Encoded Ignition Key (Key Code Format Okay)
- Retrieve DTCs - Ensure ignition is off. Using NGS tester, retrieve and record continuous DTCs. Clear continuous DTCs and perform PATS module 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 encoded ignition keys with PATS module On-Demand Self-Test to verify all other encoded ignition keys are programmed.
- Check PATS PID #OFKEYS - Using NGS tester, monitor PATS PID #OFKEYS. If PATS PID #OFKEYS does not indicate 8 keys, go to next step. If PATS PID #OFKEYS indicates 8 keys, erase and reprogram key codes. See KEY PROGRAMMING - WITHOUT PROGRAMMED KEYS under SERVICE PROCEDURES. Clear DTCs and retest system operation.
- Check Number Of Encoded Ignition Keys Available - Verify there are at least 2 programmed encoded ignition keys available with vehicle. If at least 2 programmed encoded ignition keys are available with vehicle, go to next step. If at least 2 programmed encoded ignition keys are not available with vehicle, obtain a NEW encoded ignition key so at least 2 keys are available. Program encoded ignition keys. See KEY PROGRAMMING - WITHOUT PROGRAMMED KEYS under SERVICE PROCEDURES and go to step 5).
- Check PATS PID SPARE_KY - Using NGS tester, monitor PATS PID SPARE_KY. If PATS PID SPARE_KY indicates yes, see KEY PROGRAMMING - WITH PROGRAMMED KEYS under SERVICE PROCEDURES. Retest system operation. If PATS PID SPARE_KY does not indicate yes, see KEY PROGRAMMING - SPARE KEY PROGRAMMING SWITCH under SERVICE PROCEDURES to enable SPAREKY PID to YES. Retest system operation.
- Check Encoded Ignition Keys For Proper Operation - Using first encoded ignition key, turn ignition switch to RUN position. Turn ignition off and remove first encoded ignition key. Using second encoded ignition key, turn ignition switch to RUN position. Using both encoded ignition keys, attempt to start vehicle. 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 encoded ignition keys are needed, see KEY PROGRAMMING - SPARE KEY PROGRAMMING SWITCH under SERVICE PROCEDURES.
- Retrieve DTCs - Using NGS tester, retrieve and record continuous DTCs. Clear continuous DTCs and perform PATS module On-Demand Self-Test. If DTC B1601 is retrieved, replace PATS module. Clear DTCs and retest system operation. If DTC B1601 is not retrieved, system is operating properly. If any other DTCs are retrieved, go to appropriate DTC test.