W DOC AIRBUS | TSM A320F

Feedback Disagree between the Signals of the Two Channels of the BSV on Engine 1

TASK 73-10-00-810-831-A
Feedback Disagree between the Signals of the Two Channels of the BSV on Engine 1

1. Possible Causes
  • burner staging valve
  • harness J11
  • harness J12
  • harness CJ11R
  • harness CJ12R
  • ECU [4000KS]
  • burner staging valve (BSV)
  • harness CJ11L
  • harness CJ12L
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AWM 715108
AMM 73-11-70-000-001
Removal of the Burner Selection Valve (BSV)
AMM 73-11-70-000-002
Removal of the Burner Selection Valve (BSV) for SAC Engines
AMM 73-11-70-400-001
Installation of the Burner Selection Valve (BSV)
AMM 73-11-70-400-002
Installation of the Burner Selection Valve (BSV) for SAC Engines
AMM 73-21-50-000-001
Removal of the CJ11L Harness
AMM 73-21-50-000-003
Removal of the CJ12L Harness
AMM 73-21-50-000-010
Removal of the J11 Harness
AMM 73-21-50-000-011
Removal of the J12 Harness
AMM 73-21-50-000-026
Removal of the CJ11R Harness for SAC Engines
AMM 73-21-50-000-028
Removal of the CJ12R Harness for SAC Engines
AMM 73-21-50-000-044
Removal of the HJ11 Harness for SAC Engines
AMM 73-21-50-000-045
Removal of the HJ12 Harness for SAC Engines
AMM 73-21-50-400-001
Installation of the CJ11L Harness
AMM 73-21-50-400-003
Installation of the CJ12L Harness
AMM 73-21-50-400-010
Installation of the J11 Harness
AMM 73-21-50-400-011
Installation of the J12 Harness
AMM 73-21-50-400-026
Installation of the CJ11R Harness for SAC Engines
AMM 73-21-50-400-028
Installation of the CJ12R Harness for SAC Engines
AMM 73-21-50-400-044
Installation of the HJ11 Harness for SAC Engines
AMM 73-21-50-400-045
Installation of the HJ12 Harness for SAC Engines
AMM 73-21-60-000-001
Removal of the Electronic Control Unit (ECU)
AMM 73-21-60-400-001
Installation of the Electronic Control Unit (ECU)
ASM 732518
AMM 73-29-00-710-040
Operational Test of the FADEC on the ground (with Engine Motoring)
3. Fault Confirmation
Subtask 73-10-00-710-108-A ** ON A/C NOT FOR ALL
A. Do the operational test of the FADEC 1B on the ground (with engine motoring) AMM 73-29-00-710-040.
4. Fault Isolation
Subtask 73-10-00-810-088-B ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message BSV, J11/J12, ECU:
  • Do a check for open or short to ground of the harnesses J11 and J12 between the ECU (4000KS) and the 6 o'clock junction box, between the 6 o'clock junction box and the BSV pins J11 and J12 (9, 23, 24) and pins CJ11R and CJ12R (1, 2) ASM 732518 AWM 715108.
   (1) If the wiring is not correct:
  • Repair the above defective wiring.
   (2) If the wiring is correct:
  • Disconnect the harnesses CJ11R and CJ12R from the BSV.
    Install a jumper wire between the pins 1 and 2 on the harnesses CJ11R and CJ12R.
  • Disconnect the connectors J11 and J12 from the ECU (4000KS) and do a check of the resistance of the harnesses J11 and J12 between:
    . Pins 9 and 23 (< 5 Ohms)
    . Pins 9 and 24 (> 10 Megohms)
    . Pin 9 and the ground (> 10 Megohms).
     (a) If the resistance values are in the specified limits:
       1 If the burner staging valve has been deleted:
  • No more action is necessary.
       2 If the burner staging valve is installed:
     (b) If the resistance values are out of the specified limits:
  • Disconnect the harnesses J11 and J12 from the junction box at the 6 o'clock strut and do a check of the resistance of the harnesses CJ11R and CJ12R between:
    for the harness CJ11R
    . Pins 11 and 10 (< 5 Ohms)
    . Pins 11 and 12 (> 10 Megohms)
    . Pin 11 and the ground (> 10 Megohms)
    for the harness CJ12R
    . Pins 11 and 10 (< 5 Ohms)
    . Pins 11 and 9 (> 10 Megohms)
    . Pin 11 and the ground (> 10 Megohms).
       1 If the resistance values are in the specified limits:
       2 If the resistance values are out of the specified limits:
   (3) If the fault continues:
Subtask 73-10-00-810-088-C ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message BSV, J11/J12, ECU:
  • Do a check for open or short to ground of the harnesses J11 and J12 between the ECU (4000KS) and the 6 o'clock junction box, between the 6 o'clock junction box and the BSV pins J11 and J12 (9, 23, 24) and pins CJ11L and CJ12L (1, 2) ASM 732518 AWM 715108.
   (1) If the wiring is not correct:
  • Repair the above defective wiring.
   (2) If the wiring is correct:
  • Disconnect the harnesses CJ11L and CJ12L from the BSV.
    Install a jumper wire between the pins 1 and 2 on the harnesses CJ11L and CJ12L.
  • Disconnect the connectors J11 and J12 from the ECU (4000KS) and do a check of the resistance of the harnesses J11 and J12 between:
    . Pins 9 and 23 (< 5 Ohms)
    . Pins 9 and 24 (> 10 Megohms)
    . Pin 9 and the ground (> 10 Megohms).
     (a) If the resistance values are in the specified limits:
     (b) If the resistance values are out of the specified limits:
  • Disconnect the harnesses J11 and J12 from the junction box at the 6 o'clock strut and do a check of the resistance of the harnesses CJ11L and CJ12L between:
    for the harness CJ11L
    . Pins 8 and 10 (< 5 Ohms)
    . Pins 8 and 9 (> 10 Megohms)
    . Pin 8 and the ground (> 10 Megohms)
    for the harness CJ12L
    . Pins 16 and 15 (< 5 Ohms)
    . Pins 16 and 5 (> 10 Megohms)
    . Pin 16 and the ground (> 10 Megohms).
       1 If the resistance values are in the specified limits:
       2 If the resistance values are out of the specified limits:
   (3) If the fault continues:
Subtask 73-10-00-710-109-A ** ON A/C NOT FOR ALL
B. Do the test given in Para. 3.A.
[Rev.8 from Aug 2018] 2026.04.04 04:35:15 UTC
"WTRUIB" 2025