FDIMU Receives No Data from the ECB

TASK 31-36-00-810-904-A
FDIMU Receives No Data from the ECB

1. Possible Causes

wiring
ELECTRONIC CONTROL BOX [59KD]
DMU/FDIU (FDIMU) [10TV]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 31-36-00-740-012	Test of the Flight Data Interface and Management Unit (FDIMU)
AMM 31-36-34-000-002	Removal of the FDIU/DMU (FDIMU)
AMM 31-36-34-400-002	Installation of the FDIU/DMU (FDIMU)
ASM 313701
AMM 49-00-00-710-001	Self-Test of the ECB

3. Fault Confirmation
Subtask 31-36-00-740-180-A ** ON A/C NOT FOR ALL

A. Do the FDIMU (10TV) fault monitoring test (AIDS-part) AMM 31-36-00-740-012.

NOTE: Make sure that the circuit breakers 5TV, 1KD, 2KD on the panel 121VU are closed during the test.

4. Fault Isolation
Subtask 31-36-00-810-118-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message:

ECB (59KD) / FDIMU (10TV)

(1) Do the self test of the ECB AMM 49-00-00-710-001.

(a) If the test gives a different maintenance message, you can find the related trouble shooting procedure in the applicable Page Block 201.

(2) If the fault continues:

do a check and if necessary repair the wiring between the ELECTRONIC CONTROL BOX [59KD] and the DMU/FDIU (FDIMU) [10TV] ASM 313701:

ECB Connector AB/K8 to FDIMU Connector AB/2G
ECB Connector AB/K9 to FDIMU Connector AB/2H
ECB Connector AB/E10 to Ground

(3) If the fault continues:

replace the FDIMU (10TV) AMM 31-36-34-000-002 and AMM 31-36-34-400-002.

Subtask 31-36-00-740-181-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:30:05 UTC