W DOC AIRBUS | TSM A320F

CIDS - Fault in CIDS TOP BUS 2 L

TASK 23-73-00-810-833-A
CIDS - Fault in CIDS TOP BUS 2 L

1. Possible Causes
  • DIR-CIDS, 1 [101RH]
  • DIR-CIDS, 2 [102RH]
  • DEU-A [200RH25]
  • DEU-A [200RH21]
  • DEU-A [200RH17]
  • DEU-A [200RH11]
  • DEU-A [200RH7]
  • DEU-A [200RH3]
  • DEU mount 2014VU3
  • DEU mount 2010VU21
  • wiring
  • DEU mount 2010VU17
  • DEU mount 2010VU11
  • DEU mount 2010VU7
  • DEU mount 2010VU3
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 23-73-00-740-005
BITE-Test of the Cabin Intercommunication Data System (CIDS) through the CFDS
ASM 237306
AMM 23-73-34-000-001
Removal of the CIDS Director
AMM 23-73-34-400-001
Installation of the CIDS Director
AMM 23-73-46-000-001
Removal of the Decoder/Encoder Unit A (200RH)
AMM 23-73-46-400-001
Installation of the Decoder/Encoder Unit A (200RH)
AMM 23-73-48-000-001
Removal of the DEU A/DEU B - Mount
AMM 23-73-48-400-001
Installation of the DEU A/DEU B - Mount
3. Fault Confirmation
Subtask 23-73-00-710-080-A ** ON A/C NOT FOR ALL
A. Test
   (1) Do the CIDS1/CIDS BUS test through the MCDU/CFDS.
   (2) Do the CIDS1/DEU-A test through the MCDU/CFDS.
4. Fault Isolation
Subtask 23-73-00-810-081-A ** ON A/C NOT FOR ALL
A. If the test gives a different maintenance message, do the trouble shooting procedure related to the maintenance message.
Subtask 23-73-00-810-134-F ** ON A/C NOT FOR ALL
B. If the CIDS1/CIDS BUS test gives the maintenance message TOP LINE 2L:
  • make sure that at least one cabin door is open,
  • On the overhead-panel 25VU:
    make sure that the EMER EXIT LT switch (4WL) is in the OFF position,
  • remove the DIR-CIDS (101RH) AMM 23-73-34-000-001,
  • close these CBs:
    49VU: 157RH (G02) CIDS/DIR 2/ESS,
    121VU:156RH (M07) CIDS/DIR 2/NORM,
  • wait for approx. 120 s,
  • do the CIDS2/CIDS BUS test through the MCDU/CFDS.
   (1) If the CIDS2/CIDS BUS test is OK:
   (2) If the fault continues:
  • remove the DIR-CIDS, 2 [102RH] AMM 23-73-34-000-001.
  • during the installation of the DIR-CIDS, 1 (101RH) do not close these CBs:
    49VU: 157RH (G02) CIDS/DIR 2/ESS,
    121VU:156RH (M07) CIDS/DIR 2/NORM,
  • install the DIR-CIDS, 1 [101RH] AMM 23-73-34-400-001.
  • do the CIDS1/CIDS BUS test through the MCDU/CFDS.
   (3) If the CIDS1/CIDS BUS test is OK:
   (4) If the fault continues:
  • remove the DIR-CIDS, 1 [101RH] AMM 23-73-34-000-001
  • open these CBs:
    49VU: 154RH COM/CIDS/DEU A ESS/LINE 1
    49VU: 155RH COM/CIDS/DEU A ESS/LINE 2
    121VU: 167RH COM NAV/CIDS/DEU A NORM/L AFT
    121VU: 165RH COM NAV/CIDS/DEU A NORM/L MID
    121VU: 163RH COM NAV/CIDS/DEU A NORM/L FWD
  • make sure that the resistance (line to line) at DIR-CIDS (101RH) and (102RH) connector AA/J15 and connector AA/K15 is between approx. 80 and 200 ohms ASM 237306.
   (5) If the resistance (line to line) is between approx. 80 and 200 ohms:
  • make sure that the resistance (line to GND) is not less than 50 ohms (short circuit) between:
    DIR-CIDS (101RH) and (102RH) connector AA/J15 and GND,
    DIR-CIDS (101RH) and (102RH) connector AA/K15 and GND. ASM 237306
     (a) If there is no short circuit:
  • remove the DEU-A [200RH25] AMM 23-73-46-000-001
  • install the DIR-CIDS (101RH) and DIR-CIDS (102RH) AMM 23-73-34-400-001.
  • close these CBs:
    49VU: 154RH COM/CIDS/DEU A ESS/LINE 1
    49VU: 155RH COM/CIDS/DEU A ESS/LINE 2
    121VU: 167RH COM NAV/CIDS/DEU A NORM/L AFT
    121VU: 165RH COM NAV/CIDS/DEU A NORM/L MID
    121VU: 163RH COM NAV/CIDS/DEU A NORM/L FWD
  • do the CIDS BITE test through the MCDU/CFDS AMM 23-73-00-740-005.
       1 If the CIDS BITE test gives the maintenance message DEU-A 200RH25:
       2 If the CIDS BITE test gives the maintenance message CIDS TOP LINE 2 L:
     (b) If there is a short circuit:
       1 If there is no short circuit:
       2 If the fault continues:
  • disconnect the electrical connector 7253VC3 from the DEU mount 2014VU3 AMM 23-73-48-000-001.
  • do a check for a short circuit again.
         a If there is no short circuit:
         b If the fault continues:
  • remove the DEU-A [200RH21] AMM 23-73-46-000-001
  • do a check for a short circuit again.

  • b.1. If there is no short circuit:
  • install a new DEU-A [200RH21] AMM 23-73-46-400-001.

  • b.2. If the fault continues:
  • install the removed DEU-A [200RH21] AMM 23-73-46-400-001,
  • reconnect the electrical connector to the DEU mount 2014VU3 AMM 23-73-48-400-001,
  • disconnect the electrical connector 7213VC21 from the DEU mount 2010VU21 AMM 23-73-48-000-001,
  • do a check for a short circuit again.

  • b.2.1. If there is no short circuit:
  • do a check for a short circuit at the connector 7213VC21 between pin 9 and GND (pin 11) and between pin 10 and GND (pin 11).

  • b.2.1.1. If there is a short circuit:
  • repair the wiring between the DEU mount 2010VU21 and the DEU mount 2014VU3 ASM 237306.

  • b.2.1.2. If there is no short circuit:
  • install a new DEU mount 2010VU21 AMM 23-73-48-400-001.

  • b.2.2. If there is a short circuit:
  • install the removed DEU-A [200RH21] AMM 23-73-46-400-001,
  • reconnect the electrical connector to the DEU mount 2010VU21 AMM 23-73-48-400-001,
  • do the steps (4. B. (5) (b) 2 b) again for the subsequent DEUs and DEU mounts until the maintenance message stops: ASM 237306
    DEU-A [200RH17] and DEU mount 2010VU17 ,
    DEU-A [200RH11] and DEU mount 2010VU11 ,
    DEU-A [200RH7] and DEU mount 2010VU7 ,
    DEU-A [200RH3] and DEU mount 2010VU3 .
   (6) If the resistance (line to line) is more than 200 ohms (open circuit):
  • disconnect the electrical connector 7253VC3 from the DEU mount 2014VU3 AMM 23-73-48-000-001,
  • make sure that the resistance (line to line) is not more than 200 ohms (open circuit) between:
    DEU mount 2014VU3 pin A/1 and pin A/2
     (a) If there is an open circuit:
     (b) If there is no open circuit:
  • reconnect the electrical connector to the DEU mount 2014VU3 AMM 23-73-48-400-001
  • disconnect the electrical connector 7213VC3 from the DEU mount 2010VU3 AMM 23-73-48-000-001,
  • do a check of the wiring (continuity-check) between:
    DIR-CIDS (101RH) connector AA/J15 and the connector 7213VC3 pin A/1,
    DIR-CIDS (101RH) connector AA/K15 and the connector 7213VC3 pin A/2.
       1 If there is no continuity:
  • repair the wiring between the DIR-CIDS (101RH) and the connector 7213VC3 ASM 237306.
       2 If there is continuity:
  • do a check of the wiring (continuity-check) between:
    DEU mount 2010VU3 pin A/1 and pin A/9 ,
    DEU mount 2010VU3 pin A/2 and pin A/10.
         a If there is no continuity:
         b If there is continuity:
  • reconnect the connector 7213VC3 to the DEU mount 2010VU3 AMM 23-73-48-400-001
  • do the steps 4. B. (6) again for the subsequent DEU mounts until the maintenance message stops:
    DIR-CIDS (101RH) and DEU mount 2010VU7 /connector 7213VC7,
    DIR-CIDS (101RH) and DEU mount 2010VU11 /connector 7213VC11,
    DIR-CIDS (101RH) and DEU mount 2010VU17 /connector 7213VC17,
    DIR-CIDS (101RH) and DEU mount 2010VU21 /connector 7213VC21,
    DIR-CIDS (101RH) and DEU mount 2014VU3 /connector 7253VC3.
   (7) If the resistance (line to line) is less than 80 ohms (short circuit):
     (a) If there is no short circuit:
     (b) If there is a short circuit:
       1 If there is a short circuit:
  • reconnect the electrical connector to the DEU mount 2014VU3 AMM 23-73-48-400-001,
  • do the steps 4. B. (7) again for the subsequent DEUs and DEU mounts until the maintenance message stops: ASM 237306
    DEU-A [200RH21] and DEU mount 2010VU21 ,
    DEU-A [200RH17] and DEU mount 2010VU17 ,
    DEU-A [200RH11] and DEU mount 2010VU11 ,
    DEU-A [200RH7] and DEU mount 2010VU7 ,
    DEU-A [200RH3] and DEU mount 2010VU3 .
       2 If there is no short circuit:
  • do a check for a short circuit at the disconnected connector between the pins A/9 and A/10 ASM 237306
         a If there is a short circuit:
  • repaire the wiring between the related DEU mount 2010VUxx and the DEU mount 2014VUxx/2010VUxx ASM 237306.
         b If there is no short circuit:
Subtask 23-73-00-810-455-A ** ON A/C NOT FOR ALL
C. Installation of removed components
Subtask 23-73-00-810-456-A ** ON A/C NOT FOR ALL
D. Do the test given in Para. 3.A.
[Rev.8 from Aug 2018] 2026.04.04 04:25:49 UTC
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