Chevrolet Trax: DTC B305C: Immobilizer transponder of wrong type programmed
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 B305C
Immobilizer Transponder of Wrong Type Programmed
For symptom byte information, refer to Symptom Byte List .
Circuit/System Description
Without BTM and/or ATH/ATS
When an ignition key is inserted into the ignition lock cylinder and the
ignition is switched ON, the transponder
embedded in the key is energized by the exciter coil surrounding the ignition
lock cylinder. The transponder
transmits a signal to the immobilizer control module. The immobilizer control
module translates this signal to a
serial data message which is sent 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.
With BTM and/or ATH/ATS
When a ignition key is inserted into the key pocket/slot and the ignition
mode switch is pressed, the transponder
embedded in the key is energized by the immobilizer antenna exciter coil. The
transponder transmits a signal to
the immobilizer control module. The immobilizer control module translates this
signal to a serial data message
which is sent 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
- Battery voltage is greater than 9 volts
- Transponder authentication has occurred
Conditions for Setting the DTC
- The programed transponder type does not match the equipped system on the
vehicle.
- A transponder used for vehicles without BTM and/or ATH/ATS has been
programmed to a vehicle with
BTM and/or ATH/ATS.
- A transponder used for vehicles with BTM and/or ATH/ATS has been
programmed to a vehicle without
BTM and/or ATH/ATS.
Action Taken When the DTC Sets
No action is taken.
Conditions for Clearing the DTC
- A current DTC will be cleared when the BCM detects a programed
transponder type that matches the
equipped system on the vehicle.
- A history DTC will be cleared after 100 malfunction-free ignition
cycles.
Reference Information
Schematic Reference
Immobilizer Schematics (Encore), Immobilizer Schematics (Trax)
Connector End View Reference
WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS -
INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT
CONNECTOR END VIEWS - INDEX - TRAX
Description and Operation
Immobilizer Description and Operation
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
- Ignition ON.
- Verify all available keys/transmitters are correct for the vehicle. This
can be accomplished by comparing
the part number that is laser etched on the key to the part number listed in
the parts catalog.
Replace the appropriate key.
- Verify the scan tool Key Part Number parameter displays a Key Part
Number when turning the ignition
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.
READ NEXT:
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.
Diag
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.
Diag
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.
Diag
SEE MORE:
DISC BRAKE SYSTEM DESCRIPTION AND OPERATION
System Component Description
The disc brake system consists of the following components
Disc Brake Pads
Applies mechanical output force from the hydraulic brake calipers to friction
surfaces of brake rotors.
Disc Brake Rotors
Uses mechanical output force
CLUTCH PEDAL REPLACEMENT
NOTE: The clutch pedal is part of the brake, accelerator, and
clutch pedal assembly
and cannot be serviced separately.
To replace the brake, accelerator and clutch pedal assembly, refer to Brake,
Accelerator, and Clutch Pedal
Replacement .
CLUTCH MASTER CYLINDER RESERVOIR