W DOC AIRBUS | TSM A320F

APU Inlet-Temperature (T2) Sensor Fault (131-9(A))

TASK 49-20-00-810-803-A
APU Inlet-Temperature (T2) Sensor Fault (131-9(A))

1. Possible Causes
  • INLET TEMP SENSOR SHOWS OUT OF RANGE HIGH
  • INLET TEMP SENSOR SHOWS OUT OF RANGE LOW
  • damage/contamination of electrical connector P6
  • INLET TEMPERATURE SENSOR (P6)
  • aircraft wiring
  • ELECTRONIC CONTROL BOX [59KD]
  • INLET TEMPERATURE SENSOR (8010KM)
  • INLET TEMPERATURE SENSOR (P6)
  • INLET TEMPERATURE SENSOR (8010KM)
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
MULTIMETER - STANDARD
 B. Referenced Information
REFERENCE
DESIGNATION
AMM 49-23-14-000-001
Removal of the Sensor-APU Inlet Temperature (131-9(A))
AMM 49-23-14-400-001
Installation of the Sensor-APU Inlet Temperature (131-9(A))
ASM 496102
AMM 49-61-34-000-003
Removal of the Electronic Control Box (ECB) (131-9(A))
AMM 49-61-34-400-003
Installation of the Electronic Control Box (ECB) (131-9(A))
3. Fault Confirmation
Subtask 49-20-00-710-054-A ** ON A/C NOT FOR ALL
A. Read-out of ECB Trouble Shooting Data
   (1) Put the APU MASTER SW to the ON position.
   (2) Get access to the APU LAST LEG/PREVIOUS LEG report.
   (3) Push the '>' adjacent to the related CFDS failure message:
  • the MCDU menu shows
    INLET TEMP SENSOR SHOWS OUT OF RANGE HIGH
    or
    INLET TEMP SENSOR SHOWS OUT OF RANGE LOW
   (4) Get access to the APU GND SCANNING menu.
4. Fault Isolation
Subtask 49-20-00-810-052-A ** ON A/C NOT FOR ALL
A. If the APU GND SCANNING menu gives the maintenance message:

INLET TEMP SENSOR P6

associated with Fault Code Number (FCN) 57

  • do a check for damage/contamination of electrical connector P6 of the INLET TEMPERATURE SENSOR (P6).
   (1) If the electrical connector P6 is damaged/contaminated:
  • do a repair/cleaning.
   (2) If the electrical connector is OK:
  • use a MULTIMETER - STANDARD to do a resistance check across pin A and pin B of the INLET TEMPERATURE SENSOR (P6).
     (a) If the resistance is < 72 Ohms:
     (b) If the resistance is between 72 Ohms and 200 Ohms:
  • do a check and repair of the aircraft wiring from the ECB (59KD) AB/H4,H2 to the INLET TEMPERATURE SENSOR (P6) P6/A,B ASM 496102.
       1 If the fault continues:
Subtask 49-20-00-810-053-A ** ON A/C NOT FOR ALL
B. If the APU GND SCANNING menu gives the maintenance message:

INLET TEMP SENSOR P6

associated with Fault Code Number (FCN) 58

  • do a check for damage/contamination of electrical connector P6 of the INLET TEMPERATURE SENSOR (P6).
   (1) If the electrical connector P6 is damaged/contaminated:
  • do a repair/cleaning.
   (2) If the electrical connector is OK:
  • use a MULTIMETER - STANDARD to do a resistance check across pin A and pin B of the INLET TEMPERATURE SENSOR (P6).
     (a) If the resistance is > 200 Ohms:
     (b) If the resistance is between 72 Ohms and 200 Ohms:
  • do a check and repair of the aircraft wiring from the ECB (59KD) AB/H4,H3 to the INLET TEMPERATURE SENSOR (P6) P6/A,B ASM 496102.
       1 If the fault continues:
Subtask 49-20-00-810-052-B ** ON A/C NOT FOR ALL
C. If the APU GND SCANNING menu gives the maintenance message:

INLET TEMP SENSOR (8010KM)

associated with Fault Code Number (FCN) 57

  • do a check for damage/contamination of electrical connector P6 of the INLET TEMPERATURE SENSOR (8010KM)
   (1) If the electrical connector P6 is damaged/contaminated:
  • do a repair/cleaning.
   (2) If the electrical connector is OK:
  • use a MULTIMETER - STANDARD to do a resistance check across pin A and pin B of the INLET TEMPERATURE SENSOR (P6).
     (a) If the resistance is < 72 Ohms:
     (b) If the resistance is between 72 Ohms and 200 Ohms:
  • do a check and repair of the aircraft wiring from the ECB (59KD) AB/H4,H2 to the INLET TEMPERATURE SENSOR (8010KM) P6/A,B ASM 496102.
       1 If the fault continues:
Subtask 49-20-00-810-053-B ** ON A/C NOT FOR ALL
D. If the APU GND SCANNING menu gives the maintenance message:

INLET TEMP SENSOR (8010KM)

associated with Fault Code Number (FCN) 58

  • do a check for damage/contamination of electrical connector P6 of the INLET TEMPERATURE SENSOR (8010KM)
   (1) If the electrical connector P6 is damaged/contaminated:
  • do a repair/cleaning.
   (2) If the electrical connector is OK:
  • use a MULTIMETER - STANDARD to do a resistance check across pin A and pin B of the INLET TEMPERATURE SENSOR (P6).
     (a) If the resistance is > 200 Ohms:
     (b) If the resistance is between 72 Ohms and 200 Ohms:
  • do a check and repair of the aircraft wiring from the ECB (59KD) AB/H4,H3 to the INLET TEMPERATURE SENSOR (8010KM) P6/A,B ASM 496102.
       1 If the fault continues:
Subtask 49-20-00-710-055-A ** ON A/C NOT FOR ALL
E. Do a check of the APU GND SCANNING menu.
[Rev.8 from Aug 2018] 2026.04.04 04:40:39 UTC
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