(c)
 GPS/FMS position disagreement When GPS Primary is active and either FMGC 1 or FMGC 2 latitude (longitude) deviates from either MMR 1 or MMR 2 latitude (longitude) by more than 0.5 Nm, the NAV FMS/GPS POS DISAGREE and A/C POS...........CHECK messages are displayed in amber and cyan respectively on the ECAM DU. These messages are accompanied by:

 -activation of the MASTER CAUT lights on the glareshield
 -aural warning: Single Chime (SC).
 1EFF : ALL 1 34-36-00Page 42 1 1 Config-2 May 01/05R 1 1 1CES 1

 8. BITE Function_____________ 
R  **ON A/C 051-099, 
R  A. CFDIU Interface 
R  (1) BITE description 
R  The BITE facilitates maintenance on in-service aircraft. It detects 
R  and identifies a failure related to the MMR. The BITE of the MMR is 
R  connected to the CFDIU. 
R  The BITE: 
R  - transmits permanently MMR status and its identification message to 
R  the CFDIU, 
R  - memorizes the failures which occurred during the last 63 flight 
R  legs, 
R  - monitors data inputs from the various peripherals, 
R  - transmits to the CFDIU the result of the tests performed and 
R  self-tests, 
R  - can communicate with the CFDIU through the menus. 
R  The BITE can operate in two modes: 
R  - the normal mode, 
R  - the menu mode. 
R  (a) Normal mode 
R  During the normal mode, the BITE cyclically monitors the status 
R  of the MMR. It transmits its information to the CFDIU during the 
R  concerned flight. 
R  In case of fault detection, the BITE stores the information in 
R  the fault memories. 
R  These items of information are transmitted to the CFDIU by an 
R  ARINC 429 message with label 356. 
R  (b) Menu mode 
R  The menu mode can only be activated on ground. 
R  This mode enables communication between the CFDIU and the MMR 
R  BITE by means of the MCDU. 
R  (Ref. Fig. 016) 
R  When you get access to the SYSTEM REPORT/TEST/NAV page, the ILS1 
R  and ILS2 indications can be shown instead of the MMR1 and MMR2 
R  indications. In this case, you must do the following steps: 
R  - make sure that the the engines are shut down 
R  - open CFDIU SUPPLY circuit breaker 2TW 
R  - open CFDIU BACK UP circuit breaker 8TW 
R  - make sure that MMR1 and MMR2 circuit breakers, 42RT1 and 42RT2, 
R  are closed

 1EFF : ALL 1 34-36-00Page 43 1 1 Config-2 May 01/05 1 1 1CES 1

 MMR - Maintenance Test Procedure
 Figure 016

 1EFF : ALL 1 34-36-00Page 44 1 1 Config-2 May 01/05R 1 1 1CES 1

R  - wait for 30 seconds then close the CFDIU circuit breakers 2TW 
R  and 8TW 
R  - wait for 180 seconds then get access to the SYSTEM 
R  REPORT/TEST/NAV page. 
R  All the information displayed on the MCDU during the BITE Test 
R  configuration can be printed by the printer (Ref. 31-35-00). 
R  The MMR menu mode is composed of: 
R  - LAST LEG REPORT 
R  (Ref. Fig. 017) 
R  This menu contains the fault messages (class 1 internal and 
R  external) detected during the last flight. 
R  - PREVIOUS LEGS REPORT 
R  (Ref. Fig. 018) 
R  This report contains the fault messages related to the external 
R  or internal failures (class 1) recorded during the previous 63 
R  flight legs. 
R  - LRU IDENTIFICATION 
R  (Ref. Fig. 019) 
R  Allows to display the P/N, the serial number and the software 
R  number of the equipment. 
R  - GND SCANNING 
R  (Ref. Fig. 020) 
R  Based on the monitoring and fault analysis during flight, 
R  provides information of the failures detected while using this 
R  function. 
R  - TROUBLE SHOOTING DATA 
R  (Ref. Fig. 021) 
R  Provides correlation parameters and snapshot data concerning 
R  the failure displayed in the LAST LEG REPORT and PREVIOUS LEGS 
R  REPORT. 
R  - CLASS 3 FAULTS 
R  (Ref. Fig. 022) 
R  Allows to display the class 3 faults recorded during the last 
　
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