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 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) 
R  . 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 trough 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).
 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).

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R  B. Do the test given in Para. 3.A. 
R  (1) No additional maintenance action is required if the fault is not 
R  confirmed. 
R  (2) Repeat the fault isolation procedure if the fault continues. 
R

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 TASK 77-20-00-810-806
 Loss of the T3 Thermocouple Signal - Engine 2 - Channel A and Channel B
 1. Possible Causes
_______________

 - T3 thermocouple

 - CJ13 harness

 - HJ13 harness

 - ECU (4000KS)

 

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 73-21-50-000-029 Removal of the CJ13 Harness AMM 73-21-50-000-046 Removal of the HJ13 Harness AMM 73-21-50-210-001 Visual Inspection of the Wiring Harness AMM 73-21-50-400-029 Installation of the CJ13 Harness AMM 73-21-50-400-046 Installation of the HJ13 Harness AMM 73-21-60-000-001 Removal of the Electronic Control Unit (ECU) AMM 73-21-60-400-001 Installation of the Electronic Control Unit (ECU) AMM 73-29-00-710-040 Operational Test of the FADEC on the Ground (with
 Engine non Motoring) AMM 77-23-10-000-002 Removal of the Compressor Discharge Temperature (T3) Sensor AMM 77-23-10-400-002 Installation of the Compressor Discharge Temperature (T3) Sensor
 3. Fault Confirmation
__________________
 A. Do the operational test of the FADEC 2A and 2B on the ground (with engine non motoring) (Ref. AMM TASK 73-29-00-710-040).
 4. Fault Isolation
_______________

R A. The failure message is generated if channel B sensor signal is invalid or R out of range.
R NOTE : If T3 sensor Part Number is 1348M21P01, P04 or P05, replace T3
____ R sensor (Ref. AMM TASK 77-23-10-000-002) and (Ref. AMM TASK 77-23-10-400-002).
R (1) If the failure messages T3 SNSR, J13, ECU + T3 SNSR, J13, ECU are not
R confirmed:
R - no maintenance action is required.

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ER (2) If the failure messages T3 SNSR, J13, ECU + T3 SNSR, J13, ECU are not R confirmed, but are repetitive: R - visually examine the T3 thermocouple receptacle and the CJ13 R harness connector for damaged pins and contamination (Ref. AMM TASK
　
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