- 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 harness CJ13 at the 6 o'clock junction box and do a resistance check of the harness CJ13 between: . pins 3 and 13 (1 to 10 ohms) . pins 3 and 12 (> 10 megohms) . pin 3 and the ground (> 10 megohms).
 1 If the resistance values are in the specified limits:
_
 - replace the harness J13 (Ref. AMM TASK 73-21-50-000-046) and (Ref. AMM TASK 73-21-50-400-046).
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 2_ If the resistance values are out of the specified limits:
 - disconnect the harness CJ13 from the T495 thermocouple and
 do a resistance check of the T495 thermocouple between:
 . pins A and B (1 to 10 ohms)
 . pin A and the ground (> 10 megohms).

_
 - 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,
_ do an inspection/check of the T495 thermocouple wiring harness for isolation of the defective part (Ref. AMM TASK 77-21-10-200-002).
 - if the electrical check of one of the three two-probe lead assemblies is not correct, replace the defective thermocouple: . the lower left-hand thermocouple lead assembly (Ref. AMM TASK 77-21-10-000-027) and (Ref. AMM TASK 77-21-10-400-027) or . the lower right-hand thermocouple lead assembly (Ref. AMM TASK 77-21-10-000-029) and (Ref. AMM TASK 77-21-10-400-029) or . the upper left-hand thermocouple lead assembly (Ref. AMM TASK 77-21-10-000-028) and (Ref. AMM TASK 77-21-10-400-028).

 - if the electrical check of the three-probe lead assembly is not correct: . replace the three-probe thermocouple lead assembly (Ref. AMM TASK 77-21-10-000-026) and (Ref. AMM TASK 77-21-10-400-026), (Ref. AMM TASK 77-21-10-000-027) and (Ref. AMM TASK 77-21-10-400-027), (Ref. AMM TASK 77-21-10-000-028) and (Ref. AMM TASK 77-21-10-400-028), (Ref. AMM TASK 77-21-10-000-029) and (Ref. AMM TASK 77-21-10-400-029).

 - if the electrical check of the upper extension lead is not correct: . replace the upper extension lead (Ref. AMM TASK 77-21-10-000-008) and (Ref. AMM TASK 77-21-10-400-008).

 - if the electrical check of the lower extension lead is not correct: . replace the lower extension lead (Ref. AMM TASK 77-21-10-000-009) and (Ref. AMM TASK 77-21-10-400-009).

 - if the electrical check of the main junction box assembly is not correct: . replace the main junction box assembly (Ref. AMM TASK 77-21-10-000-025) and (Ref. AMM TASK 77-21-10-400-025).

 B. Do a minimum idle check (Ref. AMM TASK 71-00-00-710-006).
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 TASK 77-00-00-810-854
 Loss of the EGT Indication on Engine 1 or 2
 1. Possible Causes
_______________
 - DMC1 (1WT1)

 - 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  31-63-34-000-001 
AMM  31-63-34-400-001 
AMM  71-00-00-710-003 
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  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 
　
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