_
R  - clean the connector and receptacle with a bristle brush and
R  stoddard solvent (Material No. CP2011) (Ref. AMM TASK 73-21-50-210-002).
 - do the electrical resistance test through the T12 temperature sensor between: . pins 1 and 2 (160 to 250 ohms) . pin 1 and the ground (>10 megohms).
 3 If the resistance values are out of the specified limits:
_
 - replace the T12 temperature sensor (Ref. AMM TASK 73-21-40-000-001) and (Ref. AMM TASK 73-21-40-400-001).
 4 If the resistance values are in the specified limits:
_
 - connect the harness HJ9 to the T12 temperature sensor (C92 connector),

 - disconnect the harness HJ9 from the ECU (4000KS) (Ref. ASM 73-25/18).

 - visually examine the receptacle and the connector for damaged pins and contamination (Ref. AMM TASK 73-21-50-210-002).

 a If damage is found:
_
 - repair or replace as required.
 b If no damage is found:
_
R  - clean the connector and receptacle with a bristle brush
R  and stoddard solvent (Material No. CP2011) (Ref. AMM TASK 73-21-50-210-002).
 - do the electrical resistance test through the harness HJ9 between: . pins 18 and 19 (160 to 250 ohms) . pins 18 and 7 (>10 megohms) . pin 18 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:
_
 - replace the harness HJ9 (Ref. AMM TASK 73-21-50-000-042) and (Ref. AMM TASK 73-21-50-400-042).
 B. Do the test given in Para. 3.
 (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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 TASK 73-20-00-810-862
 Loss of T12 Sensor Signal through the Channel A on Engine 2
 1. Possible Causes
_______________
 - T12 temperature sensor

 - ECU (4000KS)

 - harness HJ9

 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific  bristle brush
 B. Consumable Materials
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. CP2011  *
 stoddard solvent (Ref. 70-30-00)

 C. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 73-21-40-000-001 Removal of the T12 Temperature Sensor AMM 73-21-40-400-001 Installation of the T12 Temperature Sensor AMM 73-21-50-000-042 Removal of the HJ9 Harness AMM 73-21-50-210-002 Visual Inspection of the Wiring Harnesses AMM 73-21-50-400-042 Installation of the HJ9 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)
 ASM 73-25/18

 3. Fault Confirmation
__________________
 A. 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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 4. Fault Isolation
_______________
 A. The failure message is generated if channel A input from the T12 temperature sensor is invalid or out of range.
 (1) If the failure messsage T12 SNSR, J9, ECU is not confirmed:
 - replace the T12 temperature sensor (Ref. AMM TASK 73-21-40-000-001) and (Ref. AMM TASK 73-21-40-400-001).
 NOTE : Such a failure can be intermittent and therefore requires the
____ replacement of the T12 temperature sensor as a first maintenance action.
　
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