Circuit Description
This diagnostic test checks for the Enable Password Learning Flag indicating the PCM is in learn password mode. This mode allows the PCM to learn the password from the Passlock module at assembly or when being serviced. The password needs to be learned whenever the PCM or the Passlock module is replaced.
Conditions for Running the DTC
The ignition switch in the ON position.
Conditions for Setting the DTC
When the Enable Learning Flag is set.
Action Taken When the DTC Sets
The malfunction indicator lamp (MIL) will not illuminate.
Conditions for Clearing the DTC
| • | A History DTC clears after forty consecutive warm-up cycles, if this or any other emission related diagnostic does not report any failures |
| • | The use of a scan tool. |
Diagnostic Aids
The PCM in learn mode is a DTC for the vehicle at the assembly plant, dealership and outside garage personnel as an indication that the learn mode is enabled. This means the PCM is now ready to learn a new password. Refer to Vehicle Theft Deterrent system for further diagnosis.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 |
Important: Before clearing DTCs use the scan tool Capture Info to record freeze frame and failure records for reference, as data will be lost when clear Info function is used. Was the Powertrain On-Board Diagnostic (OBD) System Check performed? | -- | Go to Diagnostic System Check - Theft Deterrent in Theft Deterrent |
