Incorrect Pin Coding (131-9(A))

TASK 49-61-00-810-806-A
Incorrect Pin Coding (131-9(A))

1. Possible Causes

A/C PIN CODING DISAGREES
aircraft wiring
ELECTRONIC CONTROL BOX [59KD]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 49-00-00-710-009	Self-Test of the ECB
ASM 496101
AMM 49-61-34-000-003	Removal of the Electronic Control Box (ECB) (131-9(A))
AMM 49-61-34-400-003	Installation of the Electronic Control Box (ECB) (131-9(A))

3. Fault Confirmation
Subtask 49-61-00-710-060-A ** ON A/C NOT FOR ALL

A. Read-out of the ECB Trouble Shooting Data
(1) Put the APU MASTER SW to the ON position.
(2) Get access to the APU LAST LEG/PREVIOUS LEG report.
(3) Push the '>' adjacent to the related CFDS failure message:

the MCDU menu shows:
A/C PIN CODING DISAGREES

(4) Get access to the APU GND SCANNING menu.

4. Fault Isolation
Subtask 49-61-00-810-055-A ** ON A/C NOT FOR ALL

A. If the APU GND SCANNING menu gives the maintenance message:

WRG: ACFT TYPE PIN PROG / ECB 59KD

associated with Fault Code Number (FCN) 95

do a check and make sure that the two A321 IDENTIFICATION signals at the ECB (59KD) AB/A12,A13 ASM 496101 are the same.

(1) If the two A321 IDENTIFICATION signals are not the same:

do a check and repair of the aircraft wiring to the ECB (59KD) AB/A12,A13 to GND ASM 496101.

(a) If the fault continues after the first flight on the subsequent day:

replace the ELECTRONIC CONTROL BOX [59KD] AMM 49-61-34-000-003 and AMM 49-61-34-400-003.

(2) If the two A321 IDENTIFICATION are the same:

replace the ELECTRONIC CONTROL BOX [59KD] AMM 49-61-34-000-003 and AMM 49-61-34-400-003.

Subtask 49-61-00-710-061-A ** ON A/C NOT FOR ALL

B. Do the self test of the ECB AMM 49-00-00-710-009.

NOTE: After the subsequent filght, make sure that the fault does not continue.

[Rev.8 from Aug 2018] 2026.04.04 04:34:40 UTC