- install the DIR-CIDS, 1 (101RH) (Ref. AMM TASK 23-73-34-400-001).

 - do the CIDS1/CIDS BUS test through the MCDU/CFDS.

 (3) If the CIDS1/CIDS BUS test is OK:

 - install a new DIR-CIDS, 2 (102RH) (Ref. AMM TASK 23-73-34-400-001).

 (4) If the fault continues:

 - remove the DIR-CIDS, 1 (101RH) (Ref. AMM TASK 23-73-34-000-001)

 - open these CBs: 49VU: 158RH COM/CIDS/DEU A ESS/FWD R 49VU: 196RH COM/CIDS/DEU A ESS/MID R 49VU: 172RH COM/CIDS/DEU A ESS/AFT R 121VU: 164RH COM NAV/CIDS/DEU A NORM/R FWD 2001VU: 198RH COM NAV/CIDS/DEU A NORM/R MID 2001VU: 174RH COM NAV/CIDS/DEU A NORM/R AFT

 - make sure that the resistance (line to line) at DIR-CIDS (101RH) and (102RH) connector AA/A15 and connector AA/B15 is between approx. 80 and 120 ohms (Ref. ASM 23-73/06).

 (5) If the resistance (line to line) is between approx. 80 and 120 ohms:

 - make sure that the resistance (line to GND) is not less than 200 ohms (short circuit) between: DIR-CIDS (101RH) and (102RH) connector AA/A15 and GND, DIR-CIDS (101RH) and (102RH) connector AA/B15 and GND. (Ref. ASM 23-73/06)
 (a) If there is no short circuit:
 - remove the DEU-A (200RH16) (Ref. AMM TASK 23-73-46-000-001)

 - install the DIR-CIDS (101RH) and DIR-CIDS (102RH) (Ref. AMM TASK 23-73-34-400-001).

 - close these CBs: 49VU: 158RH COM/CIDS/DEU A ESS/FWD R 49VU: 196RH COM/CIDS/DEU A ESS/MID R 49VU: 172RH COM/CIDS/DEU A ESS/AFT R 121VU: 164RH COM NAV/CIDS/DEU A NORM/R FWD 2001VU: 198RH COM NAV/CIDS/DEU A NORM/R MID 2001VU: 174RH COM NAV/CIDS/DEU A NORM/R AFT

 - do the CIDS Interface and POWER-Up test through the MCDU/CFDS (Ref. AMM TASK 23-73-00-740-010).

 1 If the CIDS POWER-UP test gives the maintenance message DEU-A
_
 200RH16:

 - install a new DEU-A (200RH16) (Ref. AMM TASK 23-73-46-400-001).
 2 If the CIDS POWER-UP test gives the maintenance message CIDS
_
 TOP BUS 1R/ DIR1 (101RH):

 - install the removed DEU-A (200RH16) (Ref. AMM TASK 23-73-46-400-001).

 - do the steps 4. B. (5) (a) again for the subsequent DEUs until the maintenance message stops: (Ref. ASM 23-73/06) DEU-A (200RH14) DEU-A (200RH12) DEU-A (200RH10) DEU-A (200RH8) DEU-A (200RH6) DEU-A (200RH4) DEU-A (200RH2)

 (b) If there is a short circuit:
 - remove the DEU-A (200RH16) (Ref. AMM TASK 23-73-46-000-001)

 - do a check for a short circuit again.

 1 If there is no short circuit:
_
 - install a new DEU-A (200RH16) (Ref. AMM TASK 23-73-46-400-001).
 2 If the fault continues:
_
 - disconnect the electrical connector from the DEU TERMINATION BOX (209RH2) (Ref. ASM 23-73/06)

 - do a check for a short circuit again.

 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : 301-399, ∞∞23-73-00∞∞∞∞∞∞∞∞∞∞Page A237
 Aug 01/05R CES

 a If there is no short circuit:
_
 - install a new DEU TERMINATION BOX (209RH2) (Ref. AMM TASK 23-73-43-000-001) and (Ref. AMM TASK 23-73-43-400-001).
 b If the fault continues:
_
 - remove the DEU-A (200RH14) (Ref. AMM TASK 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 (200RH14) (Ref. AMM TASK 23-73-46-400-001).

 - b.2. If the fault continues:

 - install the removed DEU-A (200RH14) (Ref. AMM TASK 23-73-46-400-001),

 - reconnect the electrical connector to the DEU TERMINATION BOX (209RH2),

 - disconnect the electrical connector from the DEU CONNECTION BOX (208RH14) (Ref. ASM 23-73/06).

 - 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 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 CONNECTION BOX (208RH14) and the DEU TERMINATIONBOX (209RH2) (Ref. ASM 23-73/06).

 - b.2.1.2. If there is no short circuit:

 - install a new DEU CONNECTION BOX (208RH14) (Ref. AMM TASK 23-73-42-000-001) and (Ref. AMM TASK 23-73-42-400-001).

 - b.2.2. If there is a short circuit:

 - install the removed DEU-A (200RH14) (Ref. AMM TASK 23-73-46-400-001),

 - reconnect the electrical connector to the DEU CONNECTION BOX (208RH14)

 - do the steps (4. B. (5) (b) 2 b) again for the subsequent DEUs and DEU CONNECTION BOXES until the maintenance message stops: (Ref. ASM 23-73/06) DEU-A (200RH12) and DEU CONNECTION BOX (208RH12), DEU-A (200RH10) and DEU CONNECTION BOX (208RH10) DEU-A (200RH8) and DEU CONNECTION BOX (208RH8), DEU-A (200RH6) and DEU CONNECTION BOX (208RH6), DEU-A (200RH4) and DEU CONNECTION BOX (208RH4), DEU-A (200RH2) and DEU CONNECTION BOX (208RH2),
　
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