- 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 CFDS/MCDU.

 (1) If the CIDS2/CIDS BUS test is OK:

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

 (2) If the fault continues:

 - remove the DIR-CIDS, 2 (102RH) (Ref. AMM TASK 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) (Ref. AMM TASK 23-73-34-400-001).

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

 (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: 153RH COM/CIDS/DEU B/ESS
 121VU: 162RH COM NAV/CIDS/DEU B/NORM

 - make sure that the resistance (line to line) at DIR-CIDS (101RH) and (102RH) connector AA/D14 and connector AA/E14 is between approx. 80 and 200 ohms (Ref. ASM 23-73/06).

 (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/D14 and GND, DIR-CIDS (101RH) and (102RH) connector AA/E14 and GND. (Ref. ASM 23-73/06)
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 106-149, 151-199, 401-499, ∞∞23-73-00∞∞∞∞∞∞∞∞∞∞Page A261
 Aug 01/05 CES (a) If there is no short circuit:

 - remove the DEU-B (300RH5) (Ref. AMM TASK 23-73-47-000-001)

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

 - close these CBs: 49VU: 153RH COM/CIDS/DEU B/ESS 121VU: 162RH COM NAV/CIDS/DEU B/NORM

 - do the CIDS BITE test through the CFDS/MCDU (Ref. AMM TASK 23-73-00-740-005).

 1_ If the CIDS BITE test gives the maintenance message DEU-B
 300RH5:
 - install a new DEU-B (300RH5) (Ref. AMM TASK 23-73-47-400-
001).

 2 If the CIDS BITE test gives the maintenance message CIDS MID
_ BUS L:
 - install the removed DEU-B (300RH5) (Ref. AMM TASK 23-73-47-400-001).

 - do the steps 4. B. (5) (a) again for the subsequent DEU(s) until the maintenance message stops: (Ref. ASM 23-73/06) DEU-B (300RH1)

 (b) If there is a short circuit:
 - remove the DEU-B (300RH5) (Ref. AMM TASK 23-73-47-000-001).

 - do a check for a short circuit again.

 1 If there is no short circuit:
_
 - install a new DEU-B (300RH5) (Ref. AMM TASK 23-73-47-400-001).
 2 If the fault continues:
_
 - disconnect the electrical connector 7247VC1 from the DEU mount 2015VU1 (Ref. AMM TASK 23-73-48-000-001).

 - do a check for a short circuit again.

 a If there is no short circuit:
_
 - install a new DEU mount 2015VU1 (Ref. AMM TASK 23-73-48-000-001) and (Ref. AMM TASK 23-73-48-400-001).
 b If the fault continues:
_
 - install the removed DEU-B (300RH5) (Ref. AMM TASK 23-73-47-400-001),

 - reconnect the electrical connector to the DEU mount 2015VU1 (Ref. AMM TASK 23-73-48-400-001),

 - disconnect the electrical connector 7201VC3 from the DEU mount 2011VU3 (Ref. AMM TASK 23-73-48-000-001),

 - do a check for a short circuit again.

 - b.1. If there is no short circuit:

 「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 : 151-199, ∞∞23-73-00∞∞∞∞∞∞∞∞∞∞Page A262
 Aug 01/05R
 CES

 - do a check for a short circuit at the disconnected connector 7201VC3 between pin 9 and GND (pin 11) and between pin 10 and GND (pin 11).

 - b.1.1. If there is a short circuit:

 - repair the wiring between the DEU mount 2011VU3 and the DEU mount 2015VU1 (Ref. ASM 23-73/06).

 - b.1.2. If there is no short circuit:

 - install a new DEU mount 2011VU3 (Ref. AMM TASK 23-73-48-400-001).

 - b.2. If there is a short circuit:

 - reconnect the electrical connector to the DEU mount 2011VU3 (Ref. AMM TASK 23-73-48-400-001),

 - do the steps (4. B. (5) (b) 2 b) again for the subsequent DEU(s) and DEU mount(s) until the maintenance message stops: (Ref. ASM 23-73/06) DEU-B (300RH1) and DEU mount 2011VU1.
　
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