Failure of the CFDIU Detected by the ATC 2

TASK 31-32-00-810-875-A
Failure of the CFDIU Detected by the ATC 2

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

3. Fault Confirmation
Subtask 31-32-00-865-123-A

A. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
121VU	COM NAV/ATC/2	5SH2	K07

Subtask 31-32-00-740-194-A

B. Test
Do the BITE test of the ATC (system 2) AMM 34-52-00-740-004.

4. Fault Isolation
Subtask 31-32-00-810-124-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message ATC2 : NO DATA FROM CFDIU:

(1) If the fault continues:

do a check and repair the wiring from the CFDIU (1TW) pins AB/2H, 2J to the first terminal block , ASM 313203.

Subtask 31-32-00-810-124-B ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message CFDIU (1TW) / ATC2 (1SH2):

(1) If the fault continues:

do a check and repair the wiring from the CFDIU (1TW) pins AB/2H, 2J to the first terminal block , ASM 313203.

Subtask 31-32-00-740-195-A

B. Do the test given in Para. 3.B.

[Rev.8 from Aug 2018] 2026.04.04 04:29:53 UTC