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TASK 73-20-00-810-859
Loss of T12 Sensor Signal through the Two Channels on Engine 1
1. Possible Causes
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- ECU (4000KS)
- harness J9
- harness J10
- engine 1 T12 temperature sensor
2. Job Set-up Information
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R A. Fixtures, Tools, Test and Support Equipment
R -------------------------------------------------------------------------------R REFERENCE QTY DESIGNATION
R -------------------------------------------------------------------------------
R No specific bristle brush
R B. Consumable Materials
R -------------------------------------------------------------------------------R REFERENCE DESIGNATION
R -------------------------------------------------------------------------------
R Material No. CP2011 *
R stoddard solvent (Ref. 70-30-00)
R C. Referenced Information
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REFERENCE DESIGNATION
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R AMM AMM AMM AMM AMM AMM AMM AMM AMM 73-21-40-000-001 73-21-40-400-001 73-21-50-000-042 73-21-50-000-043 73-21-50-210-002 73-21-50-400-042 73-21-50-400-043 73-21-60-000-001 73-21-60-400-001
AMM 73-29-00-710-040
ASM 73-25/18
F EEFF : ALL E E ECES Removal of the T12 Temperature SensorInstallation of the T12 Temperature SensorRemoval of the HJ9 HarnessRemoval of the HJ10 Harness Visual Inspection of the Wiring HarnessesInstallation of the HJ9 HarnessInstallation of the HJ10 HarnessRemoval of the Electronic Control Unit (ECU)(4000KS)Installation of the Electronic Control Unit (ECU)(4000KS)Operational Test of the FADEC on the Ground (with Engine non Motoring)
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3. Fault Confirmation
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A. Do the operational test of the FADEC 1A and 1B on the ground (with engine non motoring) (Ref. AMM TASK 73-29-00-710-040).
4. Fault Isolation
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A. If the test gives the maintenance messages T12 SNSR, J9, ECU + T12 SNSR, J10, ECU:
- do a check for open or short to ground at pins J9 and J10/7, 18, 19 to pins J9 and J10/1, 2, 3 of the harnesses J9 and J10 between the ECU (4000KS) and the T12 sensor, (Ref. ASM 73-25/18).
(1) If one of these wirings is not correct:
- repair the defective harness J9 or J10.
(2) If these wirings are correct: R - disconnect the harnesses J9 and J10 from the ECU (4000KS). R - do a visual inspection of the harness connector and receptacle. R Look for contamination or oxidation or pins that have damage. R - if you find damage, repair or replace as required. R - clean the connector and receptacle with a bristle brush and R stoddard solvent (Material No. CP2011) (Ref. AMM TASK 73-21-50-210-R 002). R - do a check of the ECU cables resistance between: R
. pins 18 and 19 (160 to 250 Ohms) . pins 18 and 7 (> 10 Megohms) . pin 18 and the ground (> 10 Megohms).
(a) If the resistance values are in the specified limits:
- replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) (Ref. AMM TASK 73-21-60-400-001).
(b) If the resistance values are out of the specified limits: R - disconnect the harnesses J9 and J10 from the T12 sensor. R - do a visual inspection of the harness connector and receptacle. R Look for contamination or oxidation or pins that have damage. R - if you find damage, repair or replace as required. R - clean the connector and receptacle with a bristle brush and R stoddard solvent (Material No. CP2011) (Ref. AMM TASK 73-21-50-R 210-002). R - do a check of the T12 sensor resistance between: R
. pins 1 and 2 (160 to 250 Ohms) . pin 1 and the ground (> 10 Megohms).
1 If the resistance values are in the specified limits:
_ R - replace the defective harness J9 (Ref. AMM TASK 73-21-50-R 000-042) (Ref. AMM TASK 73-21-50-400-042) or replace the R defective harness J10 (Ref. AMM TASK 73-21-50-000-043) (Ref.
AMM TASK 73-21-50-400-043).
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F 『 E C F M E E E E 56 E E E 2 If the resistance values are out of the specified limits:
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- replace the engine 1 T12 temperature sensor (Ref. AMM TASK 73-21-40-000-001) (Ref. AMM TASK 73-21-40-400-001). 中國航空網 www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：A320 Trouble Shooting Manual 排故手冊 發動機燃油和控制 1(90)
