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 a If the resistance values are out of the specified limits:
_
 - replace the CTL UNIT-THROTTLE, ENG1 (8KS1) (Ref. AMM TASK 76-11-19-000-040) and (Ref. AMM TASK 76-11-19-400-040).
 b If the resistance values are in the specified limits:
_ - continue the troubleshooting.
 (c) Do a check of the electrical wiring between the throttle control unit (8KS1) and the ECU (4000KS) (Ref. ASM 73-25/12).
 1 if damage is found:
_
 - replace or repair the above harness.
 2 if nothing is found:
_ - continue the troubleshooting.
 (d) Do a continuity and insulation check of this wiring
 1 if damage is found:
_
 - replace or repair the above harness.
 2 if nothing is found:
_ - continue the troubleshooting.
 (e) Do a pin retention check on connectors sockets.
 1 if damage is found:
_
 - replace or repair the above harness.
 2 if nothing is found:
_ - continue the troubleshooting.
 (f) Do a check for absence of corrosion or contamination. Pay particular attention to engine to pylon connector.
 1 If damage is found:
_
 - repair the A/C electrical wiring or replace the J4 harness (Ref. AMM TASK 71-51-44-000-004) and (Ref. AMM TASK 71-51-44-400-004) as required
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 (1) No additionnal maintenance action is required if the fault is not confirmed.

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

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 TASK 76-11-00-810-814
 Disagree between the two TLA Resolver Signals on Engine 2
 1. Possible Causes
_______________
 - A/C electrical wiring

 - J3 harness

 - J4 harness

 - CTL UNIT-THROTTLE, ENG2 (8KS2)

 - ECU (4000KS)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 71-51-44-000-004 Removal of the Electronic Control Unit (ECU) Channel A Harness 238W0904 AMM 71-51-44-000-005 Removal of the Electronic Control Unit (ECU) Channel B Harness 238W0904 AMM 71-51-44-400-004 Installation of the Electronic Control Unit (ECU) Channel A Harness 238W0904 AMM 71-51-44-400-005 Installation of the Electronic Control Unit (ECU)
 Channel B Harness 238W0904 AMM 73-21-50-210-001 Visual Inspection of the Wiring Harness AMM 73-21-60-000-001 Removal of the Electronic Control Unit (ECU)(4000KS) AMM 73-21-60-400-001 Installation of the Electronic Control Unit
 (ECU)(4000KS) AMM 73-29-00-710-040 Operational Test of the FADEC on the Ground (with
 Engine non Motoring) AMM 76-11-19-000-040 Removal of the Throttle Control Unit (8KS1, 8KS2) AMM 76-11-19-400-040 Installation of the Throttle Control Unit (8KS1,
 8KS2)
 ASM 73-25/12

 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
_______________
 A. Do this procedure.
 NOTE : The fault is triggered by the ECU if both TLA resolver input
____ signals on channel A and B disagree. Most probable cause is an electrical wiring failure.
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 (1) If the test does not give the maintenance messages TLA SNSR, J3, ECU and TLA SNSR, J4, ECU:
 (a) Do a check of the electrical wiring between the throttle control unit (8KS2) and the ECU (4000KS) (Ref. ASM 73-25/12).
 1 if damage is found:
_
 - replace or repair the above harness.
 2 if nothing is found:

_ - continue the troubleshooting.
 (b) Do a continuity and insulation check of this wiring.
 1 if damage is found:

_
 - replace or repair the above harness.
 2 if nothing is found:
　
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