P1630

DTC P1630

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC P1630

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Theft Deterrent Learn Mode Active

Circuit/System Description

When replacing a remote control door lock receiver (RCDLR), the engine control module (ECM) must learn the new fuel enable password from the replacement RCDLR. If the ECM is replaced with a service replacement part, it is in a functional state to automatically learn the fuel enable password. If the RCDLR is replaced, the ECM must be placed in learn mode so it can learn the new RCDLR password. This DTC indicates the ECM is in a functional state to learn the RCDLR fuel enable password.

Conditions for Running the DTC

The ECM is in learn mode.

Conditions for Setting the DTC

DTC P1630 will set any time the ECM enters learn mode.

Action Taken When the DTC Sets

The security indicator will illuminate.

Conditions for Clearing the DTC

* A current DTC will be cleared upon a successful engine start after exit of learn mode.

* A history DTC will be cleared after 100 malfunction-free ignition cycles.

Reference Information

Schematic Reference

Immobilizer Schematics Immobilizer Schematics

Connector End View Reference

Component Connector End Views 5 Bow Lowered Switch (CM7)

Description and Operation

Immobilizer Description and Operation Immobilizer

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

Perform the 10-Minute Immobilizer Relearn procedure. Refer to Immobilizer System Component Programming Programming and Relearning. The ECM should successfully complete the password learn and the vehicle should start.

If the ECM does not complete the learn or vehicle starting remains disabled, replace the ECM.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

Control Module References Control Module References for ECM replacement, setup, and programming