DTC 63, Pass-Key(R) Key No. 2 Programming Resistance Low: Notes

To allow PASS-Key(R) operation when CCM is replaced, new CCM must be programmed to accept resistance value of existing keys. CCM prompts technician to insert keys in succession during programming process. CCM compares resistance of each key inserted and if both are within same resistance, programming sequence will end and PASS-Key(R) system will operate.

PASS-Key(R) detection circuit is completed when ignition key with embedded resistor pellet is inserted into ignition lock cylinder. When contacts in ignition lock cylinder mate with contact on pellet, CCM compares resistance value of key pellet to valid resistance programmed into CCM.

DTC 63 will set when key No. 2 is inserted and CCM senses a voltage at 5-volt PASS-Key(R) input that is lower than lower limit set by the programming of key No. 1, indicating key No. 2 resistance is less than key No. 1 resistance. Ensure key resistor contacts are clean and free from grease, oil, etc. Any contamination on contacts could cause code to set. Before replacing CCM due to PASS-Key(R) code, ensure key resistor is clean. Clear CCM DTCs and attempt reprogramming sequence. If code resets and fault is not identified during testing procedures, replace CCM.

DTC 63 will clear when CCM senses a voltage level at 5-volt PASS-Key(R) input that is within allowed range.