Electrical Failure of the Selector Valve

TASK 32-42-00-810-813-A
Electrical Failure of the Selector Valve

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 324201
AMM 32-42-11-000-001	Removal of the Brake Selector Valve
AMM 32-42-11-400-001	Installation of the Brake Selector Valve
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 32-46-00-740-005	BITE Test of BSCU - Normal Braking TEST

3. Fault Confirmation
Subtask 32-42-00-740-066-B

A. Test
(1) Do the BITE test of the Normal Braking System. AMM 32-46-00-740-005

4. Fault Isolation
Subtask 32-42-00-810-062-B

A. If the test gives the maintenance message:
BRK SELECTOR VALVE (23GG) / BSCU (10GG)

(1) If the fault continues:

(2) If the fault continues:

Do a check for a ground signal at pin A/B of the selector valve (23GG) ASM 324201

(a) If there is a ground signal:

Do a check and repair the wiring from the selector valve (23GG) to the BSCU (10GG) pin A/A to pin AB/4C, ASM 324201.

(b) If there is no ground signal:

Repair the wiring from the selector valve (23GG) pin A/B to the ground ASM 324201.

Subtask 32-42-00-740-067-A

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

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