Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2002 Pontiac Aztek FWDFACTORY OEM SERVICE PROCEDURE
Section 652 (Cellular Communication System)
WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Schematic & Routing Diagrams
- Component Locator
- Diagnostic Information & Procedures
- Diagnostic Starting Point - Cellular Communication
- Diagnostic System Check - Cellular Communication
- Scan Tool Data List
- Scan Tool Data Definitions
- Diagnostic Trouble Code (DTC) List
- DTC B2462: VIU Does Not Detect A Navigation Signal
- DTC B2476: Keypad Signal Circuit Voltage To VIU Is Low
- DTC U1500: VIU To VCU Communication Error
- OnStar® Symptom Diagnosis
- Symptoms - Cellular Communication
- OnStar® Always On
- OnStar® One Or More Buttons Inoperative
- Unable To Contact OnStar® Call Center
- OnStar® Call Center Unable To Configure OnStar® System
- Microphone Inoperative - Caller Cannot Be Heard
- Voice Recognition Inoperative
- OnStar® Button LED Inoperative
- No (or Noisy) OnStar® Audio
- Global Positioning System (GPS) Data Not Current Or Inaccurate
- OnStar® Battery Consumption Test
- OnStar® Reprogramming
- Repair Instructions
- Coaxial Cable Replacement - Cellular Telephone
- Coaxial Cable Replacement - Global Positioning System (GPS)
- OnStar® Cellular Antenna Replacement
- Antenna Assembly Replacement - Cellular & Navigation
- Vehicle Locating Antenna Ground Plate Replacement
- Navigation Antenna Replacement
- OnStar® Button Assembly Replacement (Pickup)
- OnStar® Vehicle Communication Unit (VCU) Replacement
- OnStar® Vehicle Interface Unit (VIU) Replacement
- OnStar® Microphone Replacement
- Description & Operation
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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