Workshop Manuals Factory service & repair Vauxhall
Vauxhall Astra J15 · Safety and Security
15 · General

DTC B3055

Make
Vauxhall
Model
Astra J
Section
Immobilizer › Other Information › DTC B3055
Safety and SecurityDTC B3055

DTC B3055

Diagnostic Instructions

    •  Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    •  Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    •  Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC B3055 00:  No Transponder Modulation or No Transponder Malfunction

Circuit/System Description

When an ignition key is inserted into the ignition lock cylinder and the ignition is switched ON, the transponder embedded in the key is energised by the exciter coils surrounding the ignition lock cylinder. The transponder transmits a signal to the body control module (BCM). The BCM then compares this value to a value stored in memory. If the value is correct, the BCM will send the prerelease password via the serial data circuit to the engine control module (ECM). If the learned key code does not match or a transponder value is not received, the BCM will send the start disable password to the ECM.

Conditions for Running the DTC

Ignition is in the Accessory or Run position.

Conditions for Setting the DTC

The BCM is unable to measure the ignition key transponder value.

Action Taken When the DTC Sets

    •  Vehicle starting will be disabled.
    •  The security indicator in the instrument cluster will be illuminated. A service message will be displayed in the driver information centre.

Conditions for Clearing the DTC

    •  A current DTC will be cleared when the BCM detects a valid transponder value from the ignition key.
    •  A history DTC will be cleared after 100 malfunction-free ignition cycles or when a scan tool is used to clear DTCs.

Reference Information

Schematic Reference

Immobiliser Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Immobiliser Description and Operation

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Wiring Repairs


Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

  1. Verify DTC B2955 is not set.
    2. ⇒ If the DTC B2955 is set, refer to DTC B2955 .
  2. Inspect all available vehicle keys that they are correct vehicle keys.
    3. ⇒ If not a correct vehicle key, replace the key.
  3. While viewing the scan tool instrument panel Transponder Key Part Number, turn ON the ignition with each of the available vehicle keys. The parameter should read a Key Part Number with all available keys.
    4. ⇒ If only one key results in the parameter reading no Part Number, replace the appropriate key.
  4. If all test normal, replace the K9 Body Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Control Module References for BCM and remote function receiver module replacement, setup, and programming

Parts & tools for this job For Vauxhall Astra

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