THEORY OF OPERATION
For the engine to start, the Sentry Key Immobilizer (SKIM) feature of the Radio Frequency Hub (RF Hub) and the Powertrain Control Module (PCM) must successfully communicate data over the data bus. Once the RF Hub sends the message that a valid Fob-Integrated-Key (FOBIK) is being used, the PCM and RF Hub perform a "handshake" routine, encrypted with the VIN, to validate this information, and a match allows the engine to run when the ignition state transitions to Start or a remote start occurrence. The repair of this fault is determined by the ability of the RF Hub and PCM to complete a successful handshake routine over the bus.
For the Theory of Operation. Refer to ANTENNA, PASSIVE ENTRY, OPERATION .
For the Theory of Operation. Refer to ANTENNA, PASSIVE ENTRY, OPERATION .
For the Theory of Operation. Refer to ANTENNA, PASSIVE ENTRY, OPERATION .
For the Theory of Operation. Refer to ANTENNA, PASSIVE ENTRY, OPERATION .
For the Theory of Operation. Refer to ANTENNA, PASSIVE ENTRY, OPERATION .
For the Theory of Operation. Refer to ANTENNA, PASSIVE ENTRY, OPERATION .
For the Theory of Operation. Refer to ANTENNA, PASSIVE ENTRY, OPERATION .
For the Theory of Operation. Refer to ANTENNA, PASSIVE ENTRY, OPERATION .
For the Theory of Operation. Refer to ANTENNA, PASSIVE ENTRY, OPERATION .
For the Theory of Operation. Refer to ANTENNA, PASSIVE ENTRY, OPERATION .
For the Theory of Operation. Refer to ANTENNA, PASSIVE ENTRY, OPERATION .
For the Theory of Operation. Refer to ANTENNA, PASSIVE ENTRY, OPERATION .
For the Theory of Operation. Refer to ANTENNA, PASSIVE ENTRY, OPERATION .
For the Theory of Operation. Refer to ANTENNA, PASSIVE ENTRY, OPERATION .
For the Theory of Operation. Refer to ANTENNA, PASSIVE ENTRY, OPERATION .
For the Theory of Operation. Refer to ANTENNA, PASSIVE ENTRY, OPERATION .
For the Theory of Operation. Refer to ANTENNA, PASSIVE ENTRY, OPERATION .
For the Theory of Operation. Refer to ANTENNA, PASSIVE ENTRY, OPERATION .
For the Theory of Operation. Refer to ANTENNA, PASSIVE ENTRY, OPERATION .
For the Theory of Operation. Refer to ANTENNA, PASSIVE ENTRY, OPERATION .
Whenever the ignition is turned on or there is a remote start active, the RF Hub performs a self test and resynchronization routine. During the routine, the RF Hub interrogates the FOBIK for the secret key information and performs a CAN Bus message handshake with the Powertrain Control Module (PCM) to start the vehicle. The PCM must reply to the RF Hub that the secret key information matches to initiate the start sequence or this code will set.
When the Radio Frequency Hub (RF Hub) is awake, it sends a 12-volt reference signal on the (T824) Transmission (TRS) Park Signal circuit. When that circuit is grounded by the transmission switch, the RF-Hub broadcasts that message, over the CAN network, that the vehicle is in the park position.