DOC AIRBUS | TSM A320FNo data from CFDIU - DIR 1
TASK 23-73-00-810-912-A
No data from CFDIU - DIR 1
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 23-73-00-710-310-A ** ON A/C NOT FOR ALL Subtask 23-73-00-710-310-B ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 23-73-00-810-638-A
Subtask 23-73-00-710-311-A
[Rev.8 from Aug 2018]
2026.04.04 04:25:56 UTC
No data from CFDIU - DIR 1
1. Possible Causes
- wiring
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| TSM TASK 31-32-00-810-880-A | Failure of the CFDIU |
| AMM 23-73-00-740-003 | BITE-Test of the Cabin Intercommunication Data System (CIDS) through the PTP |
| AMM 23-73-00-740-005 | BITE-Test of the Cabin Intercommunication Data System (CIDS) through the CFDS |
| ASM 237303 | |
| AMM 23-73-34-000-001 | Removal of the CIDS Director |
| AMM 23-73-34-400-001 | Installation of the CIDS Director |
| AMM 31-32-34-000-001 | Removal of the CFDIU |
| AMM 31-32-34-400-001 | Installation of the CFDIU |
Subtask 23-73-00-710-310-A ** ON A/C NOT FOR ALL Subtask 23-73-00-710-310-B ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 23-73-00-810-638-A
A. If the test gives a different maintenance message, do the trouble shooting procedure related to the maintenance message.
Subtask 23-73-00-810-639-A ** ON A/C NOT FOR ALL B. If the test gives the maintenance message NO CFDIU DATA
Subtask 23-73-00-810-639-B ** ON A/C NOT FOR ALL - on the ECAM control panel:
select the ECAM STATUS page on the lower ECAM display.
- do the related trouble shooting procedure (Ref. TSM TASK 31-32-00-810-880).
- remove the DIR-CIDS, 1 (101RH) AMM 23-73-34-000-001.
- remove the CFDIU 1TW AMM 31-32-34-000-001.
- do a check of the wiring between:
CFDIU 1TW connector AA pin 3F and DIR-CIDS, 1 (101RH) connector AA pin A11,
CFDIU 1TW connector AA pin 3G and DIR-CIDS, 1 (101RH) connector AA pin B11,
CFDIU 1TW connector AA pin 11F and DIR-CIDS, 1 (101RH) connector AA pin D11,
CFDIU 1TW connector AA pin 11G and DIR-CIDS, 1 (101RH) connector AA pin E11,
ASM 237303. - install the removed DIR-CIDS, 1 (101RH) AMM 23-73-34-400-001.
- install the removed CFDIU 1TW AMM 31-32-34-400-001.
B. If the test gives the maintenance message CFDIU (1TW)/ DIR1 (101RH)
5. Close-up- on the ECAM control panel:
select the ECAM STATUS page on the lower ECAM display.
- do the related trouble shooting procedure (Ref. TSM TASK 31-32-00-810-880).
- remove the DIR-CIDS, 1 (101RH) AMM 23-73-34-000-001.
- remove the CFDIU 1TW AMM 31-32-34-000-001.
- do a check of the wiring between:
CFDIU 1TW connector AA pin 3F and DIR-CIDS, 1 (101RH) connector AA pin A11,
CFDIU 1TW connector AA pin 3G and DIR-CIDS, 1 (101RH) connector AA pin B11,
CFDIU 1TW connector AA pin 11F and DIR-CIDS, 1 (101RH) connector AA pin D11,
CFDIU 1TW connector AA pin 11G and DIR-CIDS, 1 (101RH) connector AA pin E11,
ASM 237303. - install the removed DIR-CIDS, 1 (101RH) AMM 23-73-34-400-001.
- install the removed CFDIU 1TW AMM 31-32-34-400-001.
Subtask 23-73-00-710-311-A
A. Do the test as given in Para. 3.