3. Fault Confirmation
__________________
 A. Test
Procedure for Class 3 Faults Reading
Removal of the Braking/Steering Control Unit (BSCU)
 (10GG)
Installation of the Braking/Steering Control Unit
 (BSCU) (10GG)

 (1) On the CFDS MENU page, get access to the AVIONICS STATUS page (Ref. AMM TASK 31-32-00-869-002)
R NOTE : If the fault message "NO BSCU 1 DATA" is shown on the Current
____ R Flight Report or on the Post Flight Report after reset of the R anti skid and nose wheel steering system with the A/SKID & R NOSE WHEEL control switch (5GG):
 - no action is necessary
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message NO BSCU 1 DATA:
 - replace the BSCU (10GG) (Ref. AMM TASK 32-42-34-000-001) and (Ref. AMM TASK 32-42-34-400-001).
 (1) If the fault continues:
 - do a check and repair the wiring from the BSCU pins AA/6E, 6F to the first terminal block (Ref. ASM 32-46/01).
 B. Test
 (1) Do the test given in Para.3.
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞32-42-00∞∞∞∞∞∞∞∞∞∞Page A201
 May 01/05 CES

 TASK 32-42-00-810-889

 One Autobrake Mode Pushbutton Switch Inoperative
 1. Possible Causes
_______________
 - BSCU (10GG)

 - P/BSW - AUTO BRK/LO (8GG)

 - wiring from the AUTO BRK/LO pushbutton switch (8GG) pin A/A3 to the ground terminal

 - wiring from the AUTO BRK/LO pushbutton switch (8GG) to the BSCU (10GG)

 - P/BSW - AUTO BRK/MED (7GG)

 - wiring from the AUTO BRK/MED pushbutton switch (7GG) pin A/A3 to the ground terminal

 - wiring from the AUTO BRK/MED pushbutton switch (7GG) to the BSCU (10GG)

 - P/BSW - AUTO BRK/MAX (6GG)

 - wiring from the AUTO BRK/MAX pushbutton switch (6GG) pin A/A3 to the ground terminal

 - wiring from the AUTO BRK/MAX pushbutton switch (6GG) to the BSCU (10GG)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 32-42-34-000-001 Removal of the Braking/Steering Control Unit (BSCU) (10GG) AMM 32-42-34-400-001 Installation of the Braking/Steering Control Unit (BSCU) (10GG) ASM 32-42/03
 3. Fault Confirmation
__________________
 A. Test
 (1) Not applicable.
 4. Fault Isolation
_______________
 A. If you cannot engage the AUTO BRAKE mode
 (1) With the AUTO BRK/LO pushbutton switch (8GG)
 - replace the P/BSW - AUTO BRK/LO (8GG) (Ref . AWM 20-45-11)
 (a) If the fault continues:
 - replace the BSCU (10GG) (Ref. AMM TASK 32-42-34-000-001) and (Ref. AMM TASK 32-42-34-400-001).
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞32-42-00∞∞∞∞∞∞∞∞∞∞Page A202
 Feb 01/04R CES

 (b) If the fault continues:
 - do a check for a ground signal at pin A/A3 of the AUTO BRK/LO pushbutton switch (8GG) (Ref. ASM 32-42/03).
 1 If there is no ground signal:
_
 - repair the wiring from the AUTO BRK/LO pushbutton switch (8GG) pin A/A3 to the ground terminal (Ref. ASM 32-42/03).
 2 If there is a ground signal:
_
 - do a check and repair the wiring from the AUTO BRK/LO pushbutton switch (8GG) to the BSCU (10GG) pin A/A1 to pin AA/15E (Ref. ASM 32-42/03).
 (2) With the AUTO BRK/MED pushbutton switch (7GG):
 - replace the P/BSW - AUTO BRK/MED (7GG) (Ref.AWM 20-45-11)
 (a) If the fault continues:

 - replace the BSCU (10GG) (Ref. AMM TASK 32-42-34-000-001) (Ref. AMM TASK 32-42-34-400-001).

 (b) If the fault continues:

 - do a check for a ground signal at pin A/A3 of the AUTO BRK/MED pushbutton switch (7GG) (Ref. ASM 32-42/03).
 1 If there is no ground signal:
_
 - repair the wiring from the AUTO BRK/MED pushbutton switch (7GG) pin A/A3 to the ground terminal (Ref. ASM 32-42/03).
 2 If there is a ground signal:
_
 - do a check and repair the wiring from the AUTO BRK/MED pushbutton switch (7GG) to the BSCU (10GG) pin A/A1 to pin AA/14E (Ref. ASM 32-42/03).
　
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