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Home >> Audi >> 2016 >> S5 Prestige, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 737 (Handles, Locks, Latches And Entry Systems) >> Diagnosis And Testing >> Handles, Locks, Latches and Entry Systems - With Intelligent Access (IA) >> Pinpoint Tests >> Pinpoint Test AK : The Keyless Entry Keypad Illumination Is Always On >> Pinpoint Test AK : The Keyless Entry Keypad Illumination Is Always On

Pinpoint Test AK : The Keyless Entry Keypad Illumination Is Always On

WARNING: This page is about a different car, the 2016 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

  1. AK1 CHECK THE KEYLESS ENTRY KEYPAD ILLUMINATION

    NOTE: It is normal operation for the keypad to illuminate when the illuminated entry/exit feature is active. Make sure all the doors are closed and the feature times out.

    • Ignition ON.
    • Wait 45 seconds and observe the keyless entry keypad illumination.

    Does the keyless entry keypad continue to illuminate? 

    Yes  GO to  AK2.
    No  The system is operating correctly. INFORM the customer of the normal operation of the keypad illumination.

  2. AK2 ISOLATE THE RFA MODULE

    • Ignition OFF.
    • Disconnect: RFA Module C4392A .
    • Ignition ON.

    Does the keyless entry keypad continue to illuminate? 

    Yes  GO to  AK3.
    No  GO to  AK4.

  3. AK3 CHECK THE RFA MODULE KEYPAD ILLUMINATION OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE

    • Ignition OFF.
    • Disconnect: Keyless Entry Keypad C500 .
    • Ignition ON.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C500-2
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit.
    No  INSTALL a new keyless entry keypad. REFER to Keyless Entry Keypad .

  4. AK4 CHECK FOR CORRECT RFA MODULE OPERATION

    • Disconnect and inspect all the RFA module connectors.
    • Repair:
      • corrosion (install new connector or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary
    • Reconnect the RFA module connectors. Make sure they seat and latch correctly.
    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes  CHECK On-Line Automotive Service Information System(OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new RFA module. REFER to Multifunction Electronic Modules .
    No  The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
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