W DOC AIRBUS | TSM A320F

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

TASK 73-10-00-810-807-A
Feedback Disagree between the Signals of the Two Channels of the BSV on Engine 1

1. Possible Causes
  • burner staging valve (BSV)
  • harness J11
  • harness J12
  • harness CJ11L
  • harness CJ12L
  • ECU [4000KS]
  • burner staging valve
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 73-21-50-000-025
Removal of the CJ11L Harness
AMM 73-21-50-000-027
Removal of the CJ12L Harness
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 73-21-50-400-025
Installation of the CJ11L Harness
AMM 73-21-50-400-027
Installation of the CJ12L Harness
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 73-10-00-710-058-A ** ON A/C NOT FOR ALL
A. Do the operational test of the FADEC 1A on the ground (with engine motoring) AMM 73-29-00-710-040.
4. Fault Isolation
Subtask 73-10-00-810-055-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 harness 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 CL11L and CL12L/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 harness CJ11L and CJ12L from the BSV.
    Install a jumper wire between the pins 1 and 2 on the harness CJ11L and CJ12L.
  • disconnect the connector J11 and J12 from the ECU (4000KS) and do a check of the resistance of the harness 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 harness J11 and J12 from the junction box at the 6 o'clock strut and do a check of the resistance of the harness 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 73-10-00-810-055-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 harness 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 CL11L and CL12L/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 harness CJ11L and CJ12L from the BSV.
    Install a jumper wire between the pins 1 and 2 on the harness CJ11L and CJ12L.
  • disconnect the connector J11 and J12 from the ECU (4000KS) and do a check of theresistance of the harness 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 harness J11 and J12 from the junction box at the 6 o'clock strut and do a check of the resistance of the harness 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 73-10-00-710-059-A ** ON A/C NOT FOR ALL
B. Do the test given in Para. 3.A.
[Rev.8 from Aug 2018] 2026.04.04 04:35:14 UTC
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