W DOC AIRBUS | TSM A320F

Loss of T12 Sensor Signal through the Channel A on Engine 2

TASK 73-20-00-810-862-A
Loss of T12 Sensor Signal through the Channel A on Engine 2

1. Possible Causes
  • T12 temperature sensor
  • harness J9
  • ECU [4000KS]
  • harness HJ9
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
BRUSH - BRISTLED
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.CP2011)
stoddard solvent
 C. Referenced Information
REFERENCE
DESIGNATION
AMM 73-21-40-000-001
Removal of the T12 Temperature Sensor
AMM 73-21-40-000-040
Removal of the T12 Temperature Sensor
AMM 73-21-40-400-001
Installation of the T12 Temperature Sensor
AMM 73-21-40-400-040
Installation of the T12 Temperature Sensor
AMM 73-21-50-000-008
Removal of the J9 Harness
AMM 73-21-50-000-042
Removal of the HJ9 Harness for SAC Engines
AMM 73-21-50-210-001
Visual Inspection of the Wiring Harness
AMM 73-21-50-210-002
Visual Inspection of the Wiring Harnesses
AMM 73-21-50-400-008
Installation of the J9 Harness
AMM 73-21-50-400-042
Installation of the HJ9 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 73-20-00-710-140-A ** ON A/C NOT FOR ALL
A. Do the operational test of the FADEC 2A on the ground (with engine non motoring) AMM 73-29-00-710-040.
4. Fault Isolation
Subtask 73-20-00-810-112-A ** ON A/C NOT FOR ALL
A. The failure message is generated if channel A input from the T12 temperature sensor is invalid or out of range.
   (1) If the failure message T12 SENS, J9, ECU is not confirmed:
NOTE: Such a failure can be intermittent and therefore requires the replacement of the T12 temperature sensor as a first maintenance action.
   (2) If the failure message T12 SENS, J9, ECU is not confirmed but is repetitive:
  • do the following procedure after the replacement of the T12 temperature sensor.
     (a) Disconnect the harness J9 from the T12 temperature sensor (C12 connector) ASM 732518:
  • visually examine the receptacle and the connector for damaged pins and contamination AMM 73-21-50-210-001.
       1 If damage is found:
  • repair or replace as required.
       2 If no damage is found:
       3 If the fault continues during the subsequent flights:
       4 If the fault continues during the subsequent flights:
   (3) If the failure message T12 SENS, J9, ECU is confirmed:
     (a) Disconnect the harness J9 from the T12 temperature sensor (C12 connector) ASM 732518:
  • visually examine the receptacle and the connector for damaged pins and contamination AMM 73-21-50-210-001.
       1 If damage is found:
  • repair or replace as required.
       2 If no damage is found:
  • clean the connector and receptacle with a BRUSH - BRISTLED and stoddard solvent (Material No.CP2011) AMM 73-21-50-210-001.
  • do the electrical resistance test through the T12 temperature sensor between:
    . pins 1 and 2 (160 to 250 ohms)
    . pin 1 and the ground (>10 megohms).
       3 If the resistance values are out of the specified limits:
       4 If the resistance values are in the specified limits:
  • connect the harness J9 to the T12 temperature sensor (C12 connector),
  • disconnect the harness J9 from the ECU (4000KS) ASM 732518,
  • visually examine the receptacle and the connector for damaged pins and contamination AMM 73-21-50-210-001.
         a If damage is found:
  • repair or replace as required.
         b If no damage is found:
  • clean the connector and receptacle with a BRUSH - BRISTLED and stoddard solvent (Material No.CP2011) AMM 73-21-50-210-001.
  • do the electrical resistance test through the harness J9 between:
    . pins 18 and 19 (160 to 250 ohms)
    . pins 18 and 7 (>10 megohms)
    . pin 18 and the ground (>10 megohms).
         c If the resistance values are in the specified limits:
         d If the resistance values are out of the specified limits:
Subtask 73-20-00-810-112-B ** ON A/C NOT FOR ALL
A. The failure message is generated if channel A input from the T12 temperature sensor is invalid or out of range.
   (1) If the failure message T12 SNSR, J9, ECU is not confirmed:
NOTE: Such a failure can be intermittent and therefore requires the replacement of the T12 temperature sensor as a first maintenance action.
   (2) If the failure message T12 SNSR, J9, ECU is not confirmed but is repetitive:
  • do the following procedure after the replacement of the T12 temperature sensor.
     (a) Disconnect the harness J9 from the T12 temperature sensor (C12 connector) ASM 732518:
  • visually examine the receptacle and the connector for damaged pins and contamination AMM 73-21-50-210-001.
       1 If damage is found:
  • repair or replace as required.
       2 If no damage is found:
       3 If the fault continues during the subsequent flights:
       4 If the fault continues during the subsequent flights:
   (3) If the failure message T12 SNSR, J9, ECU is confirmed:
     (a) Disconnect the harness J9 from the T12 temperature sensor (C12 connector) ASM 732518:
  • visually examine the receptacle and the connector for damaged pins and contamination AMM 73-21-50-210-001.
       1 If damage is found:
  • repair or replace as required.
       2 If no damage is found:
  • clean the connector and receptacle with a BRUSH - BRISTLED and stoddard solvent (Material No.CP2011) AMM 73-21-50-210-001.
  • do the electrical resistance test through the T12 temperature sensor between:
    . pins 1 and 2 (160 to 250 ohms)
    . pin 1 and the ground (>10 megohms).
       3 If the resistance values are out of the specified limits:
       4 If the resistance values are in the specified limits:
  • connect the harness J9 to the T12 temperature sensor (C12 connector),
  • disconnect the harness J9 from the ECU (4000KS) ASM 732518,
  • visually examine the receptacle and the connector for damaged pins and contamination AMM 73-21-50-210-001.
         a If damage is found:
  • repair or replace as required.
         b If no damage is found:
  • clean the connector and receptacle with a BRUSH - BRISTLED and stoddard solvent (Material No.CP2011) AMM 73-21-50-210-001.
  • do the electrical resistance test through the harness J9 between:
    . pins 18 and 19 (160 to 250 ohms)
    . pins 18 and 7 (>10 megohms)
    . pin 18 and the ground (>10 megohms).
         c If the resistance values are in the specified limits:
         d If the resistance values are out of the specified limits:
Subtask 73-20-00-810-112-C ** ON A/C NOT FOR ALL
A. The failure message is generated if channel A input from the T12 temperature sensor is invalid or out of range.
   (1) If the failure message T12 SNSR, J9, ECU is not confirmed:
NOTE: Such a failure can be intermittent and therefore requires the replacement of the T12 temperature sensor as a first maintenance action.
   (2) If the failure message T12 SNSR, J9, ECU is not confirmed but is repetitive:
  • do the following procedure after the replacement of the T12 temperature sensor.
     (a) Disconnect the harness HJ9 from the T12 temperature sensor (C92 connector) ASM 732518:
  • visually examine the receptacle and the connector for damaged pins and contamination AMM 73-21-50-210-002.
       1 If damage is found:
  • repair or replace as required.
       2 If no damage is found:
       3 If the fault continues during the subsequent flights:
       4 If the fault continues during the subsequent flights:
   (3) If the failure message T12 SNSR, J9, ECU is confirmed:
     (a) Disconnect the harness HJ9 from the T12 temperature sensor (C92 connector) ASM 732518:
  • visually examine the receptacle and the connector for damaged pins and contamination AMM 73-21-50-210-002.
       1 If damage is found:
  • repair or replace as required.
       2 If no damage is found:
  • clean the connector and receptacle with a BRUSH - BRISTLED and stoddard solvent (Material No.CP2011) AMM 73-21-50-210-002.
  • do the electrical resistance test through the T12 temperature sensor between:
    . pins 1 and 2 (160 to 250 ohms)
    . pin 1 and the ground (>10 megohms).
       3 If the resistance values are out of the specified limits:
       4 If the resistance values are in the specified limits:
  • connect the harness HJ9 to the T12 temperature sensor (C92 connector),
  • disconnect the harness HJ9 from the ECU (4000KS) ASM 732518,
  • visually examine the receptacle and the connector for damaged pins and contamination AMM 73-21-50-210-002.
         a If damage is found:
  • repair or replace as required.
         b If no damage is found:
  • clean the connector and receptacle with a BRUSH - BRISTLED and stoddard solvent (Material No.CP2011) AMM 73-21-50-210-002.
  • do the electrical resistance test through the harness HJ9 between:
    . pins 18 and 19 (160 to 250 ohms)
    . pins 18 and 7 (>10 megohms)
    . pin 18 and the ground (>10 megohms).
         c If the resistance values are in the specified limits:
         d If the resistance values are out of the specified limits:
Subtask 73-20-00-710-141-A ** ON A/C NOT FOR ALL
B. Do the test given in Para. 3.
   (1) No additional maintenance action is required if the fault is not confirmed.
   (2) Repeat the fault isolation procedure if the fault continues.
[Rev.8 from Aug 2018] 2026.04.04 04:41:02 UTC
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