_ - continue the troubleshooting.
 (c) 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.
 (d) Do a check for absence of corrosion or contamination. Pay
 particular attention to engine to pylon connectors.

 1 If damage is found:
_
 - repair the A/C electrical wiring or replace the J3 harness (Ref. AMM TASK 71-51-44-000-004) and (Ref. AMM TASK 71-51-44-400-004) or J4 harness (Ref. AMM TASK 71-51-44-000-005) and (Ref. AMM TASK 71-51-44-400-005) as required.
 2 If nothing is found:
_
 - replace the CTL UNIT-THROTTLE, ENG2 (8KS2) (Ref. AMM TASK 76-11-19-000-040) and (Ref. AMM TASK 76-11-19-400-040).
 a if the fault repeats on subsequent flights:
_
 - replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
 (2) If the test gives the maintenance messages TLA SNSR, J3, ECU and TLA SNSR, J4, ECU (confirmed on two channels):
 - Do the two following steps (3) and (4).
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 (3) If the test gives the maintenance message TLA SNSR, J3, ECU (confirmed on channel A):

 - Disconnect the J3 harness from the ECU (4000KS) receptacle and visually examine the ECU receptacle and the J3 harness connector for damaged pins or contamination (Ref. AMM TASK 73-21-50-210-001).
 (a) If damage on a connector is found:

 - replace or repair as required.

 (b) If nothing is found:

 - do an electrical resistance test through the J3 harness between: . pins 17 and 30 (30 to 40 ohms) . pins 5 and 15 (15 to 25 ohms) . pins 29 and 28 (15 to 25 ohms) . pins 17 and 16 (> 10 megohms) . pins 5 and 16 (> 10 megohms) . pins 29 and 16 (> 10 megohms) . pin 17 and the ground (> 10 megohms) . pin 5 and the ground (> 10 megohms) . pin 29 and the ground (> 10 megohms).
 1 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).
 2 If the resistance values are out of the specified limits:
_
 - disconnect the connector 1208VC at the throttle control unit (8KS2) and do the resistance check at the throttle control unit connector between: . pins A, B (30 to 40 ohms) . pins C, D (15 to 25 ohms) . pins E, F (15 to 25 ohms) .pin A and the ground (> 10 megohms) .pin B and the ground (> 10 megohms) .pin C and the ground (> 10 megohms)
 a If the resistance values are out of the specified limits:
_
 - replace the CTL UNIT-THROTTLE, ENG2 (8KS2) (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 as follows:
 (c) 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.
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 (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 J3 harness (Ref. AMM TASK 71-51-44-000-004) and (Ref. AMM TASK 71-51-44-400-004).
 (4) If the test gives the maintenance message TLA SNSR, J4, ECU (confirmed on channel B):
 - Disconnect the J4 harness from the ECU (4000KS) receptacle and visually examine the ECU receptacle and the J4 harness connector for damaged pins or contamination (Ref. AMM TASK 73-21-50-210-001).
 (a) If damage on a connector is found:
　
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