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GPS RECEPTION COMPLAINTS: TROUBLESHOOTING CONNECTOR ISSUES
TECHNICAL SERVICE BULLETIN
Reference Number(s): GROUP 91, NO. 14-52 (2037756/1), Date of Issue: July 22, 2014
91 14 52 2037756/1 July 22, 2014.
APPLICABLE MODELS AND YEARS
CONDITION
l The customer complains about GPS navigation issues that may be antenna-related.
l No DTC entry is logged.
TECHNICAL BACKGROUND
If the GPS antenna cable became partially connected during assembly or during a repair,
it may still function. But, the partially-connected cable can cause an intermittent
issue that does not cause a DTC to be logged.
PRODUCTION SOLUTION
Improved wiring assembly production process implemented.
SERVICE
This bulletin is for information only and will help aid in the troubleshooting of
potential GPS performance issues related to the coax cable connection that runs from
the GPS antenna to the MMI main unit.
1. Park the vehicle outside to ensure sufficient satellite reception.
2. Connect an ODIS diagnostic tester and start the self-diagnosis:
Start Diagnosis >> Uncheck "Use Guided Fault Finding" >> Control Modules >> 5FInformation
electronics 1 >> Right Click or Long Press to Identify Control Module
>> Control module OBD >> Read Measured Value Block
3. For MMI 3G+:
AUDI: A4, A5, A6, A7, A8, Q7 2013-2014; A3 2015
GROUP: 91 - Radio, Telephone, Board Computer, Multi-Function Indicator (MFI)
Model(s) Year VIN Range Vehicle-Specific Equipment
A4, A5, A6, A7, A8, Q7 2013-2014 All MMI Navigation
A3 2015 All MMI Navigation
NOTE: This bulletin should be performed before any other bulletins that cover
specific customer complaints.
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GPS RECEPTION COMPLAINTS: TROUBLESHOOTING CONNECTOR ISSUES
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Select the measured value blocks 97.1 and 97.2. The display shows the current
value of the received or used satellites:
l MVB 97.2 indicates the satellites that are currently being used by the main
unit for tracking the vehicle's current position.
l MVB 97.1 indicates the number of recognized satellites, but the
identification of these satellites is not confirmed, therefore they are not
used in determining the vehicle's current position.
For MMI MIB:
Search for the keyword "GPS" and select "Status GPS reception". Within this MVB,
the sub-values of "Number of visible satellites" and "Number of tracked
satellites" will be viewable (Figure 1):
l "Number of visible satellites" is the number of unconfirmed satellites that
are not used for positioning the vehicle.
l "Number of tracked satellites" is the number of satellites currently being
used for positioning the vehicle.
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4. Move the connector on the back of the MMI main unit (Figure 2) and observe whether
the value of the two MVBs change on the display:
l If the value of 97.2/"Number of tracked satellites" drops below 3, proceed to
step 5.
l If there is no change in the number of satellites, proceed to step 7.
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5. Inspect the blue connector for damage at the coax terminal (Figure 3). If damage
is found, replace the coax cable from the antenna to the MMI main unit.
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6. Inspect the connector locking tab for damage (Figure 4). If damage is found,
replace only the connector housing for the damaged end of the coax cable.
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7. Access the GPS antenna connectors (Figure 5). Move the connector on the GPS aerial
and observe the MVBs for the GPS antenna (97.1/97.2).
If the value of 97.2/"Number of tracked satellites" drops under 3, check that the
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connector on the GPS aerial is correctly plugged-in and that there is no damage on
the connector housing.
8. If no damage is found to any of the connectors and the results of the wiggle test
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with MVBs is inconclusive, continue with other applicable GPS-related bulletins or
contact TAC for further assistance.
WARRANTY
This TSB is informational only and not applicable to any Audi warranty.
ADDITIONAL INFORMATION
All parts and service references provided in this TSB (2037756) are subject to change
and/or removal. Always check with your Parts Department and service manuals for the
latest information.
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