MMR1 Test cannot be started

TASK 34-36-00-810-852-A
MMR1 Test cannot be started

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 22-83-34-000-001	Removal of the FMGC
AMM 22-83-34-400-001	Installation of the FMGC
AMM 32-31-71-000-001	Removal of the LGCIU
AMM 32-31-71-400-001	Installation of the LGCIU
AMM 34-36-00-740-003	BITE Test of the MMR
ASM 343601
AMM 34-36-31-000-001	Removal of the ILS Receiver
AMM 34-36-31-400-001	Installation of the ILS Receiver

3. Fault Confirmation
Subtask 34-36-00-740-120-A

A. Test
Do the BITE test of the MMR1 AMM 34-36-00-740-003.

4. Fault Isolation
Subtask 34-36-00-810-116-A

A. If the test gives the maintenance message
LGCIU1(5GA1)/FMGC1(1CA1)/ MMR1(40RT1):

(1) If there is no short to ground:

(2) If there is a short to ground at pin AB/4A:

(a) If there is a short to ground at pin AB/4A:

do a check and repair the wiring between the MMR1(40RT1) and the LGCIU1(5GA1) for pin AB/4A and pin AB/6D ASM 343601.

(3) If there is a short to ground at pin AB/15F:

(a) If there is a short to ground at pin AB/15F:

do a check and repair the wiring between the MMR1(40RT1) and the FMGC1(1CA1) for pin AB/15F and pin AB/9A ASM 343601.

Subtask 34-36-00-740-121-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:33:01 UTC