Buick Regal: OnStar Call Center Remote Function Requests Malfunction
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.
- Refer to Diagnostic Procedure Instructions for an overview of each
diagnostic category.
Circuit/System Description
The telematics communication interface control module has the capability of
commanding the horn,
initiating door lock/unlock, or operating the exterior lamps using the serial
data circuits. These functions
are commanded by the OnStar Call Center per a customer request.
Diagnostic Aids
The customer concern may have been due to a lack of cellular service in a
given area, or a failure in the
National Cellular Network infrastructure that has since been corrected.
Reference Information
Schematic Reference
OnStar/Telematics Wiring Schematics
Connector End View Reference
Component Connector End View Index
Description and Operation
OnStar Description and Operation (UE1 with IOB/IO6) , OnStar Description
and Operation (UI3)
, or OnStar Description and Operation (UE1 without IOB/IO6).
Electrical Information Reference
- Refer to Circuit Testing
- Refer to Connector Repairs
- Refer to Testing for Intermittent Conditions and Poor Connections
- Refer to Wiring Repairs
Scan Tool Reference
Control Module References for scan tool information.
Circuit/System Verification
NOTE:
- It is necessary to inform the OnStar Call Center advisor that
this
call is for vehicle diagnostic purposes.
- It is necessary to have the vehicle in an open outside area where
a
cellular call can be successfully placed and GPS data can be
received from satellites.
1. Ignition ON/vehicle in Service Mode.
2. Verify that the horn, lights, and the door locks on the vehicle operate
properly.
- If an applicable vehicle system does not operate properly
Refer to Diagnostic System Check - Vehicle.
- Go to next step: If all applicable vehicle systems operate properly
3. Verify that a call can be successfully placed to the OnStar Call Center by
pressing the blue OnStar
button.
- If unable to contact the OnStar call center
Refer to Unable to Contact OnStar Call Center
- Go to next step: If able to contact the OnStar Call Center
4. Verify with the OnStar advisor that all remote functions (door locks,
lights, and horn) work.
- If the remote functions do not operate when requested
Replace the K73 Telematics Communication Interface Control Module
- Go to next step: If the remote functions operate when requested
5. All OK.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
Control Module References for telematics communication interface 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.
Refe
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.
Refe
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.
Refe
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 Descriptor
DT
Preliminary Procedure
Electronic Brake and Traction Control Module with Brake Pressure Modulator
Valve
Replacement (2.0L LTG) or Electronic Brake and Traction Control Module with
Brake
Pressure Modulator Valve Replacement (3.6L LGX)
Electronic Brake Control Module Bolt[4x]
CAUTION: Fastener Ca