Navigation system control unit
NOTE: If a unit or component is likely to fail and the vehicle is still under manufacturer's warranty, refer to the warranty manual before replacing the component (section B1.2) or determine if there is any previously approved special program in operation.
NOTE: Universal Scan Tools may not read the listed codes or may only read 5-digit codes. Match the 5 digits from the scan tool with the first 5 digits of the 7-digit code listed to identify the problem (the last 2 digits give additional information read by the diagnostic system approved by the manufacturer).
NOTE: Always use a digital multimeter when performing voltage or resistance tests (DMM) accurate to three decimal places and with a valid calibration certificate. When testing resistance, be sure to consider the resistance of the DMM leads.
NOTE: Before starting diagnostic programs using troubleshooting tests, check and correct major problems.
NOTE: Inspect the connectors for signs of water intrusion and their pins for damage and (or) traces of corrosion.
NOTE: If DTCs are logged and there is no problem after performing troubleshooting tests, an intermittent problem may be the cause. Be sure to check for loose connections and corroded contacts.
Description and operation
For a detailed description of the navigation system, see the relevant section «Description and operation» repair manuals. For more information, see the chapter: Navigation system (415-01 Infotainment system, Description and operation).
DTC | Description | Possible reason | Action |
B1A89-11 | Satellite antenna | GPS Antenna Circuit Short to Ground | Refer to electrical circuit diagrams and check GPS antenna circuit for short to ground |
B1A89-13 | Satellite antenna | GPS Antenna Circuit Open | Refer to electrical circuit diagrams and check GPS antenna circuit for open circuit |
B1A89-1B | GPS module | Failure in the GPS receiver | Install a new multimedia block. For more information, see the chapter: Navigation system that works with DVD discs (415-01 Infotainment system, Removal and installation). |
B1D55-14 | Antenna Circuit #2 | Traffic announcement antenna circuit (TMC) /Communication and vehicle information systems (VICS): chain break | NOTE: Ignore this DTC on vehicles with unit part number suffixes E*, D*, or C* If a traffic message channel system failure is detected, refer to the circuit diagrams and check the traffic message channel/communication system antenna circuit and vehicle information at break |
B1D56-14 | Antenna Circuit #3 | VICS Beacon Antenna Circuit Open | Refer to electrical circuit diagrams and check VICS beacon antenna circuit for open circuit |
U2005-31 | Control block | No vehicle speed message | Check the infotainment module for MOST network DTCs and refer to the appropriate DTC index. Perform MOST Network Tests Using Manufacturer Approved Diagnostic System |
U3000-49 | Control block | Internal fault | Install a new multimedia block. For more information, see the chapter: Navigation system that works with DVD discs (415-01 Infotainment system, Removal and installation). |
U3000-55 | Control block | Incorrect vehicle configuration file data received | Check/update vehicle configuration file using manufacturer approved diagnostic system |
U3000-87 | Control block | Missing message | Check the central junction box for DTCs and refer to the DTC index. For more information, please refer to the chapter: Communication Network (418-00 Module communication network, Diagnostics and checks). Check the infotainment system module for DTCs for the vehicle and MOST network configuration file and refer to the appropriate DTC index. Perform MOST/CAN network tests using the manufacturer approved diagnostic system |
U3000-98 | Control block | Elevated element or system temperature | Check for additional DTCs and refer to the appropriate DTC index. Check/monitor system for reoccurrence of codes |
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