- disconnect the harness HJ13 from the ECU (4000KS) and do a resistance check of the cable J13 between: . pins 11 and 23 (0.5 to 10 ohms) . pins 11 and 24 ( > to megohms) . pin 11 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) and (Ref. AMM TASK 73-21-60-400-001).

 (b) If the resistance values are out of the specified limits:

 - disconnect the connector CJ13 at the 6 o'clock junction box and do a resistance check of the cable CJ13 between: . pins 2 and 11 (0.5 to 10 ohms) . pins 2 and 12 ( > 10 megohms) . pin 2 and the ground ( > 10 megohms) (Ref. AWM 71-51-09).
 1 If the resistance values are in the specified limits:
_
 - replace the harness HJ13 (Ref. AMM TASK 73-21-50-000-046) and (Ref. AMM TASK 73-21-50-400-046).
 2 If the resistance values are out of the specified limits:
_
 - disconnect the harness CJ13 from the T5 sensor and do a resistance check of the T5 sensor between: . pins A and B (0.88 to 1.22 ohms) . pin A and the ground ( > 10 megohms).
 a If the resistance values are in the specified limits:
_
 - replace the harness CJ13 (Ref. AMM TASK 73-21-50-000-029) and (Ref. AMM TASK 73-21-50-400-029).
 b If the resistance values are out of the specified limits:
_
 - replace the T5 temperature sensor (Ref. AMM TASK 77-22-10-000-002) and (Ref. AMM TASK 77-22-10-400-002).
 B. Do the test given in Para. 3.A. R
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 Loss of the EGT Thermocouple Signal to the ECU on Engine 1
 1. Possible Causes
_______________
 - harness HJ13

 - 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 AMM AMM AMM AMM AMM  73-21-50-000-029 73-21-50-000-046 73-21-50-400-029 73-21-50-400-046 73-21-60-000-001 73-21-60-400-001 
AMM  73-29-00-710-040 
R  AMM AMM AMM AMM AMM AMM AMM AMM  77-21-10-000-008 77-21-10-000-009 77-21-10-000-025 77-21-10-000-026 77-21-10-000-027 77-21-10-000-028 77-21-10-000-029 77-21-10-200-002 
R  AMM AMM AMM AMM  77-21-10-400-008 77-21-10-400-009 77-21-10-400-025 77-21-10-400-026 
AMM  77-21-10-400-027 
AMM  77-21-10-400-028 

F EEFF : ALL E E ECES Removal 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 non Motoring)Removal of the Upper Extension LeadRemoval of the Lower Extension Lead Removal 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 Lead Installation of the Main Junction BoxInstallation of the Upper Right Thermocouple Lead AssemblyInstallation of the Lower Left Thermocouple Lead AssemblyInstallation of the Upper Left Thermocouple Lead Assembly
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R AMM 77-21-10-400-029 Installation of the Lower Right Thermocouple Lead
 Assembly
 ASM 73-25/15
 AWM 71-51-05
　
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