With ATH

DTC B1016 (with ATH)

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 B1016 00
- Vehicle Identification Number (VIN) Information Not Programmed

Circuit/System Description

After a loss of battery power has been restored, the remote control door lock receiver (RCDLR) will perform a check on the stored vehicle identification number (VIN). If the VIN is CORRECT, the RCDLR will run the VIN Timer for a programmable length of time, typically 10 minutes. The RCDLR will send a message via the serial data circuit to the instrument panel cluster (IPC) to illuminate the SECURITY indicator. After the VIN Timer has timed out, the security indicator will turn OFF. If the VIN is INCORRECT, the RCDLR will send the fuel disable password to the engine control module (ECM), via the serial data circuit. The immobilizer system considers this to be a tamper and will not allow the vehicle to start. The RCDLR will send a message via the serial data circuit to the IPC to flash the SECURITY indicator.

Conditions for Running the DTC

Ignition ON

Conditions for Setting the DTC

* The VIN check flag of the RCDLR is true.
* The RCDLR has determined that the battery has been reconnected after a battery disconnect.

Action Taken When the DTC Sets

* The vehicle will not start.
* The RCDLR sends the fuel disable message via the serial data circuit to the ECM.
* The RCDLR sends a message to the IPC to illuminate the SECURITY indicator.

Conditions for Clearing the DTC

The RCDLR clears the current DTC when the correct VIN information is present.

Reference Information
Schematic Reference

Immobilizer Schematics Immobilizer Schematics
Connector End View Reference

Component Connector End Views Connector Views
Description and Operation

Immobilizer Description and Operation (with ATH) Immobilizer Description and Operation (with ATH)Immobilizer Description and Operation (without ATH) Immobilizer Description and Operation (without ATH)
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

With a scan tool, verify DTC B1016 is not set.

If DTC is set, program the RCDLR. If DTC resets, replace the RCDLR.

Repair Instructions

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

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