Chevrolet Trax: DTC B3055: Security controller in learn mode
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
No Transponder Modulation or No Transponder
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.
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
center.
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.
Diagnostic Aids
- Because DTC B3055 may be caused by a malfunctioning vehicle key, it is
necessary to have all available
vehicle keys at the time of diagnosis. A possible scenario would be a
customer leaving the vehicle with a
spare key during the service visit, but the key which they use everyday, not
the spare key, is the cause of
the DTC. Not having all available keys in this instance would result in the
customer concern not being
duplicate or a misdiagnosis.
- Ensure that the immobilizer control module is properly installed and
fully seated. An audible and/or
tactile click will indicate that the immobilizer control module is fully
seated. To ensure proper
transponder communication, the key must be in a specific location in
relation to the immobilizer control
module. If the immobilizer control module is not fully seated, transponder
communication may not occur
and DTC B3055 will set.
- For vehicle without BTM and/or ATH/ATS, verify the customer is not
attempting to turn the ignition
with the vehicle key partially folded. To ensure proper transponder
communication, the key must be in a
specific location in relation to the immobilizer control module. Attempting
to start the vehicle with the
key in the ignition and partially folded will result in no transponder
communication and DTC B3055 will
set.
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
Without BTM and/or ATH/ATS
- Ignition ON.
- Verify that DTC B1370, B1380, or B1441 is not set.
- If any of the DTCs are set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- If none of the DTCs are set
- Verify the scan tool body control module Accessory parameter changes
between Active and Inactive
when turning the ignition ON and OFF
- If the parameter does not change
Refer to Vehicle Will Not Change Power Mode .
- Verify all available keys 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 that DTC B3055 does not set while attempting to start the vehicle
which each available key.
- If DTC B3055 sets when attempting to start the vehicle with only one
of the available keys
Replace the appropriate key.
- If DTC B3055 sets when attempting to start the vehicle with all of
the available keys
Replace the K89 Immobilizer Control Module.
- If DTC B3055 does not set
- All OK.
With BTM and/or ATH/ATS
- Ignition ON.
- Verify that DTC B1370, B1380, or B1441 is not set.
- If any of the DTCs are set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- If none of the DTCs are set
- Verify the scan tool body control module Accessory parameter changes
between Active and Inactive
when turning the ignition ON and OFF.
- If the parameter does not change
Refer to Power Mode Mismatch .
- Verify all available keys 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.
- Remove the battery from each of the available vehicle keys.
- Verify that DTC B3055 does not set while attempting to start the vehicle
which each available key. To
start the vehicle with the key battery removed, the key must be placed in
the key pocket/slot.
- If DTC B3055 sets when attempting to start the vehicle with only one
of the available keys
Replace the appropriate key.
- If DTC B3055 sets when attempting to start the vehicle with all of
the available keys
Replace the K89 Immobilizer Control Module.
- If DTC B3055 does not set
- All OK.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
Control Module References for immobilizer control module replacement,
programming, and setup.
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:
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 Descriptors
D
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
DT