(a) If the fault continues during the subsequent flights, continue the troubleshooting as follows.
 (10) Replace the J10 Harness (Ref. AMM TASK 73-21-50-000-043) and (Ref. AMM TASK 73-21-50-400-043).
 B. Do the test given in Para. 3.A.
 (1) No additional maintenance action is required if the fault is not confirmed.

 (2) Repeat the fault isolation procedure if the fault continues.

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ECES  TASK 77-00-00-810-853

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 EGT Indication Permanently Equal to 15.C on Engine 1 or 2
 1. Possible Causes
_______________
 - harness J13

 - ECU (4000KS)

 - harness CJ13

 - lower left-hand thermocouple lead assembly

 - lower right-hand thermocouple lead assembly

 - upper left-hand thermocouple lead assembly

 - three-probe thermocouple lead assembly

 - upper extension lead

 - lower extension lead

 - main junction box assembly

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM  71-00-00-710-006 
AMM  73-21-50-000-029 
AMM  73-21-50-000-046 
AMM  73-21-50-400-029 
AMM  73-21-50-400-046 
AMM  73-21-60-000-001 
AMM  73-21-60-400-001 
AMM  73-29-00-710-040 
AMM  77-21-10-000-008 
AMM  77-21-10-000-009 
AMM  77-21-10-000-025 
AMM  77-21-10-000-026 
AMM  77-21-10-000-027 
AMM  77-21-10-000-028 
AMM  77-21-10-000-029 
AMM  77-21-10-200-002 
AMM  77-21-10-400-008 
AMM  77-21-10-400-009 
AMM  77-21-10-400-025 
AMM  77-21-10-400-026 
AMM  77-21-10-400-027 

F EEFF : ALL E
R E ECES Minimum Idle CheckRemoval of the CJ13 HarnessRemoval of the HJ13 HarnessInstallation of the CJ13 HarnessInstallation of the HJ13 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 Motoring)Removal of the Upper Extension LeadRemoval of the Lower Extension LeadRemoval of the Main Junction BoxRemoval of the Upper Right Thermocouple Lead AssemblyRemoval of the Lower Left Thermocouple Lead AssemblyRemoval of the Upper Left Thermocouple Lead AssemblyRemoval of the Lower Right Thermocouple Lead AssemblyInspection/Check of the T495 Thermocouple Wiring HarnessInstallation of the Upper Extension LeadInstallation of the Lower Extension LeadInstallation of the Main Junction BoxInstallation of the Upper Right Thermocouple Lead AssemblyInstallation of the Lower Left Thermocouple Lead Assembly
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AMM 77-21-10-400-028 Installation of the Upper Left Thermocouple Lead Assembly AMM 77-21-10-400-029 Installation of the Lower Right Thermocouple Lead
 Assembly ASM 73-25/15 AWM 71-51-05
 3. Fault Confirmation
__________________
 A. Test
 Do the operational test of the FADEC on the ground (with engine mon
 motoring) (Ref. AMM TASK 73-29-00-710-040).

 4. Fault Isolation
_______________
 A. If the fault symptom is identified by the crew observation: ENG1/2 - EGT indication permanently equal to 15.C (default value), and no message is present in the CFDS:
 - do a check for open or short to ground of the T495 thermocouple and of the harness J13 between the ECU (4000KS), the 6 o'clock junction box and the T495 thermocouple (Ref. AWM 71-51-05) and (Ref. ASM 73-25/15).
 (1) If the wiring is not correct:

 - repair the above wiring.

 (2) If the wiring is correct:

 - disconnect the harness J13 from the ECU (4000KS) and do a resistance check of the cable between: . pins 12 and 13 (1 to 10 ohms) . pins 12 and 24 (> 10 megohms) . pin 12 and the ground (> 10 megohms).
　
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