2008 Volvo XC70FACTORY OEM SERVICE PROCEDURE

Radar Module (RDAR) DTCS

RADAR MODULE (RDAR) - DIAGNOSTIC TROUBLE CODE (DTC) INDEX

DTC Volvo Code Description
B1A89 RDAR-B1A8911 Satellite Antenna. General Electrical Failures. Circuit Short To Ground
B1A89 RDAR-B1A8912 Satellite Antenna. General Electrical Failures. Circuit Short To Battery
B1A89 RDAR-B1A8913 Satellite Antenna. General Electrical Failures. Circuit Open
U3000 RDAR-U300004 Control Module. General Signal Failures. System Internal Failures
U3000 RDAR-U30004A Control Module. Component Failures. Incorrect Component Installed
U3000 RDAR-U300055 Control Module. System Internal Failures. Not Configured
U3000 RDAR-U300087 Control Module. General Signal Failures. Missing Message
U3000 RDAR-U300098 Control Module. System Internal Failures. Component Or System Over Temperature
U3003 RDAR-U300362 Battery Voltage. Algorithm Based Failures. Signal Compare Failure
Factory Service Tools

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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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