DTC P1630 Export
Circuit Description
The theft deterrent control module produces the theft deterrent fuel enable signal when ignition is ON and the proper transponder key value is detected. The powertrain control module (PCM) monitors the fuel enable signal during crank. If the proper signal is present on the serial data circuit, the PCM enables the fuel delivery in order to allow the engine to start. If the PCM is replaced, the replacement PCM should learn the password within a few seconds after the ignition is turned ON. DTC P1630 is an information code indicating that the PCM is ready to learn the theft deterrent password. The engine starts and continues to run with DTC P1630 set.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC 1630 Theft Deterrent Learn Mode Active
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
The PCM remains in theft deterrent password learn mode for more than 2 seconds.
Actions Taken When the DTC Sets
| • | The PCM sends a serial data message to the instrument panel cluster (IPC) to illuminate the SECURITY indicator. |
| • | The PCM will not illuminate the malfunction indicator lamp (MIL). |
| • | The PCM will store conditions which were present when the DTC set as failure records data only. This information will not be stored as freeze frame data. |
Conditions for Clearing the MIL/DTC
| • | A history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction. |
| • | The DTC can be cleared by using a scan tool. |
Diagnostic Aids
A replacement PCM is in a functional state to learn the password from the theft deterrent control module. If the theft deterrent control module is replaced, the PCM must be placed in password learning mode to relearn the new password. Once learned, the password becomes permanent information that remains with the vehicle. The loss of PCM battery or ignition voltage does not affect the programmed password information. Refer to Theft Deterrent Control Module Programming and Setup .
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Immobilizer Schematics Connector End View Reference: Immobilizer Connector End Views | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | ||
DTC P1630 Domestic
Circuit Description
This diagnostic test checks for the enable password learning flag indicating the powertrain control module (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.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC P1630 Theft Deterrent Learn Mode Active
Conditions for Running the DTC
The ignition is 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 MIL/DTC
| • | A history DTC clears after 40 consecutive warm-up cycles, if this or any other emission related diagnostic does not report any failures. |
| • | The scan tool Clear Info function was used. |
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.
Test Description
The number below refers to the step number on the diagnostic table.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Immobilizer Schematics | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |
2 |
Does the scan tool display DTC P1630 as a current DTC? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections |
Does the scan tool display DTC B2945, B2955, P1626, or P1631? | Go to Step 5 | ||
4 | Replace the PCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 5 | -- |
5 |
Does DTC P1630 reset? | Go to Step 3 | System OK |
