- repair or replace as required.
 (b) If no damage is found:
 - do a resistance check of the two T3 thermocouple connectors between: . pins A and B (0.5 to 10 ohms) . pin A and the ground (> 10 megohms).
 1 If the resistance values of one of the two T3 thermocouple
_ connectors are out of specified limits:
 - replace the T3 thermocouple (Ref. AMM TASK 77-23-10-000-002) and (Ref. AMM TASK 77-23-10-400-002).
 2 If the resistance values are in the specified limits:
_

 - reconnect the CJ13 harness to the T3 thermocouple

 - disconnect the HJ13 harness from the ECU

 - visually examine the ECU (4000KS) receptacle and the HJ13 harness connector for damaged pins and contamination (Ref. AMM TASK 73-21-50-210-001).

 a If harness connector or ECU receptacle is damaged:
_
 - repair or replace as required.

 b If no damage is found:
_
 - do an electrical resistance test through the HJ13 harness between: . pins 4 and 5 (0.5 to 10 ohms) . pins 14 and 15 (0.5 to 10 ohms) . pins 4 and 16 (> 10 megohms) . pins 14 and 16 (> 10 megohms) . pin 4 and the ground (> 10 megohms) . pin 14 and the ground (> 10 megohms).

 c 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).

 d If the resistance values are out of the specified limits:
_
 - reconnect the HJ13 harness

 - disconnect the HJ13 harness from the CJ13 harness at the 6 o'clock junction box

 - do an electrical resistance test through the CJ13 harness between: . pins 7 and 8 (0.5 to 10 ohms) . pins 1 and 10 (0.5 to 10 ohms) . pins 7 and 9 (> 10 megohms) . pins 1 and 9 (> 10 megohms) . pin 7 and the ground (> 10 megohms) . pin 1 and the ground (> 10 megohms).

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 E 56 E E E e If the resistance values are out of the specified limits:

_
 - replace the CJ13 harness (Ref. AMM TASK 73-21-50-000-029) and (Ref. AMM TASK 73-21-50-400-029).

 f If the resistance values are in the specified limits:
_
 - replace the HJ13 harness (Ref. AMM TASK 73-21-50-000-046) and (Ref. AMM TASK 73-21-50-400-046).

 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 77-20-00-810-810

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 1. Possible Causes

 Loss of the T3 Thermocouple Signal - Engine 2 - Channel A _______________
 - T3 thermocouple

 - CJ13 harness

 - HJ13 harness

 - ECU (4000KS)

 2. Job Set-up Information______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM  73-21-50-000-029 
AMM  73-21-50-000-046 
AMM  73-21-50-210-001 
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  77-23-10-000-001 
AMM  77-23-10-000-002 
AMM  77-23-10-400-001 
AMM  77-23-10-400-002 

3. Fault Confirmation
__________________
 A. Test
Removal of the CJ13 HarnessRemoval of the HJ13 HarnessVisual Inspection of the Wiring HarnessInstallation of the CJ13 HarnessInstallation of the HJ13 HarnessRemoval of the Electronic Control Unit (ECU)Installation of the Electronic Control Unit (ECU)Operational Test of the FADEC on the Ground (with Engine non Motoring)Removal of the Compressor Discharge Temperature (T3) SensorRemoval of the Compressor Discharge Temperature (T3) SensorInstallation of the Compressor Discharge Temperature (T3) SensorInstallation of the Compressor Discharge Temperature (T3) Sensor

 (1) Do the operational test of the FADEC 2A on the ground (with engine non motoring) (Ref. AMM TASK 73-29-00-710-040).
　
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