Loss of the BSCU BUS 4 SYS2 Input

TASK 32-42-00-810-856-A
Loss of the BSCU BUS 4 SYS2 Input

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 32-42-34-000-001	Removal of the Braking/Steering Control Unit (BSCU)
AMM 32-42-34-400-001	Installation of the Braking/Steering Control Unit (BSCU)
AMM 32-46-00-740-001	BITE Test of the BSCU
ASM 324601

3. Fault Confirmation
Subtask 32-42-00-740-124-A

A. Test
(1) Do a reset of the BSCU with the A/SKID AND NOSE WHEEL switch (5GG).
(2) Do the BITE test of the BSCU AMM 32-46-00-740-001.

4. Fault Isolation
Subtask 32-42-00-810-127-B

A. If the test gives the maintenance message CFDIU(1TW)/BSCU(10GG):

(1) If the fault continues:

do a check and repair the wiring from the BSCU (10GG) pin AA/13B, 13C to the first terminal block ASM 324601.

Subtask 32-42-00-740-125-A

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

[Rev.8 from Aug 2018] 2026.04.04 04:31:34 UTC