Loss of or Incorrect Brake Temperature Indication on Wheels 1, 2, 3 and 4

TASK 32-47-00-810-807-A
Loss of or Incorrect Brake Temperature Indication on Wheels 1, 2, 3 and 4

1. Possible Causes

wiring from the circuit breaker (1GW) to the first terminal block
C/B-HYDRAULIC/BRK/TEMP/DET/UNIT [1GW]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 32-46-00-740-001	BITE Test of the BSCU
ASM 324701

3. Fault Confirmation
Subtask 32-47-00-740-062-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 32-47-00-810-056-C

A. If the test gives the maintenance messages BRAKE TEMP SENSOR1(5GW)/BTMU(3GW) and BRAKE TEMP SENSOR2(7GW)/BTMU(3GW) and BRAKE TEMP SENSOR3(4GW)/BTMU(2GW) and BRAKE TEMP SENSOR4(6GW)/BTMU(2GW) or if all wheel brake temperatures are equal to zero degrees:

Do a check of the circuit breaker (1GW) status.

(1) If the circuit breaker is closed:

Do a check of the wiring from the circuit breaker (1GW) to the first terminal block ASM 324701.

(a) If there is no continuity:

Repair the related wiring.

(b) If there is continuity:

Replace the C/B-HYDRAULIC/BRK/TEMP/DET/UNIT [1GW] .

(2) If the circuit breaker is open:

Close it.

(a) If it trips:

Do a check of the wiring from the circuit breaker (1GW) to the first terminal block ASM 324701.

1 If there is a short to ground:

Repair the related wiring.

2 If there is no short to ground:

Replace the C/B-HYDRAULIC/BRK/TEMP/DET/UNIT [1GW] .

Subtask 32-47-00-740-063-A

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

[Rev.8 from Aug 2018] 2026.04.04 04:31:46 UTC