Chevrolet Trax: DTC P0633: Immobilizer key not 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 P0633
Immobilizer Key Not Programmed
Circuit/System Description
When learning the immobilizer data, as well as the challenge and response
sequence, the engine control module
(ECM) is placed in learn mode. DTC P0633 will set automatically as an indicator
that the system is in learn
mode and not as a fault indicator. Once the immobilizer data and
challenge/response are learned, learn mode
will be exited when the engine is successfully started. If the ECM does not exit
learn mode, DTC P0633 will
remain current and indicate a fault.
Conditions for Running the DTC
The ECM is in learn mode.
Conditions for Setting the DTC
DTC P0633 will set any time the ECM enters learn mode.
Action Taken When the DTC Sets
The security indicator in the instrument cluster will illuminate.
Conditions for Clearing the DTC
- A current DTC will be cleared upon a successful engine start after exit
of learn mode.
- 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
NOTE:
DTC P0633 will clear upon a successful engine start. Any malfunction that
will
cause a no-start condition will prevent DTC P0633 from clearing. Prior to
diagnosing DTC P0633, ensure that all power moding and engine control
systems are operating properly and all conditions that may cause a no-start
have been corrected. Do not replace the K20 Engine Control Module. Replacing
the K20 Engine Control Module will not correct the no-start condition.
- Verify there are no immobilizer DTCs set in the K9 Body Control Module.
- If any immobilizer DTCs are set in the K9 Body Control Module
Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- If no immobilizer DTCs are set in the K9 Body Control Module
- Perform the K20 Engine Control Module immobilizer learn using the engine
control module IMMO
Learn in SPS. Refer to Immobilizer System Component Programming.
3. Verify the engine starts after the K20 Engine Control Module completes
the learn procedure.
- If the engine does not start
An undiagnosed no-start condition exists. Refer to the appropriate subsection
and diagnostic to
correct the no-start condition.
- 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:
Fig. 42: Backup Lamp Switch
Backup Lamp Switch Replacement
TRANSMISSION REAR MOUNT REPLACEMENT (AWD)
Removal Procedure
Remove the transfer case. Refer to Transfer Case Replacement .
Fig. 43: Transmission Bracket Bolts
Remove and DISCARD the five transmission bracket bolts (1).
Fig. 44:
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