Service Information

Volt

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

When an ignition key is inserted into the transmitter slot and the ignition mode is changed, the transponder embedded in the head of the key is energised by the exciter coils. The energised transponder transmits a signal that contains its unique value, which is received by the body control module (BCM). The BCM then compares this value to a value stored in memory. If the value is not correct, the BCM disables engine start.

Conditions for Running the DTC

Vehicle is ON or in Service Mode.

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 will illuminate. 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.

Reference Information

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Vehicle in Service Mode.
Verify all available keys are correct for the vehicle.

⇒	*If a key is not correct*

Replace the key

⇓	*If all keys are correct*

Verify the scan tool BCM Key Part Number parameter reads a Key Part Number when turning the vehicle ON with each key.

⇒	*If a Key Part Number is not read*

Replace the appropriate key.

⇓	*If a Key Part Number is read for each key*

All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Key with Integrated Transmitter Programming