PATS Parameter Identifications (PIDs)
In conjunction with Diagnostic Trouble Codes (DTCs), the PATS Parameter Identifications (PIDs) are a useful tool when diagnosing PATS concerns.
BCM Parameter Identification (PID) Chart
| Acronym | Name | Description |
|---|---|---|
| KEYS_PROGMD | PATS number of ignition key codes supported | Number of keys currently programmed into the BCM. |
| MIN_KEYS_RQD | Minimum number of keys required | Minimum number of programmed keys required. This Parameter Identification (PID) always reads 2. |
| PCM_ID | PCM ID status stored | Indicates if there is a PCM identification currently stored in the BCM. Must read stored for the engine to start. |
| PCM_VERIFY | PCM verify OK | Indicates if the PCM identification received by the BCM matches the PCM identification stored in the BCM memory. Must read yes for the engine to start. |
| START_ENABLD | Vehicle enable status | Indicates if the PATS allows the engine to start. Must read enabled for the engine to start. |
PCM Parameter Identification (PID) Chart
| Acronym | Name | Description |
|---|---|---|
| PCMID | PCM ID Status Stored | Indicates if there is a BCM identification currently stored in the PCM. Must read stored for the vehicle to be driven. |
| PATSENABL | Vehicle Enable Status | Indicates if PATS allows the vehicle to be driven. Must read enabled for the engine to start. |
Component Description
Integrated Keyhead Transmitter (IKT)
The Integrated Keyhead Transmitter (IKT) incorporates both the PATS functions and the RKE transmitter functions in a single device.
During key programming procedures, the PATS and the RKE transmitter of an Integrated Keyhead Transmitter (IKT) are programmed into the BCM. Conventional PATS keys can also be programmed to the vehicle, if requested by the customer.
A minimum of 2 and a maximum of 8 keys can be programmed.
PATS Transceiver
The PATS transceiver reads any key placed in the ignition lock cylinder. When the ignition changes to RUN or START, the BCM activates the PATS transceiver. Once the transceiver activates, it activates the key transponder in the ignition and receives the key data. Once the transceiver receives the key data, it sends the data to the BCM.
BCM
When the BCM is replaced, program at least 2 keys and perform the parameter reset procedure.
PCM
When the PCM is replaced, perform the parameter reset procedure.