- disconnect the HJ10 harness from the alternator stator.
 (a) Visually examine the alternator stator receptacle and the HJ10 harness connector for damaged pins or contamination, and the 90. elbow of the harness boot for evidence of overheat (Ref. AMM TASK 73-21-50-210-002).
 1 If harness or alternator stator connector is damaged:
_ - repair or replace as required.

 2 If no damage is found:
_

 - remove the alternator stator (Ref. AMM TASK 73-21-30-000-001).
 (b) Visually examine the alternator stator and rotor for evidence of contact.
 1 If evidence of contact is found, the cause must be determined:
_

 - inspect the alternator rotor nut for proper installation, inspect the AGB lubrication unit magnetic plug and screen for particles (Ref. AMM TASK 79-21-10-210-002).
 a If chips are found on the chip detector:
_

 - replace the AGB (Ref. AMM TASK 72-63-00-000-003) and (Ref. AMM TASK 72-63-00-400-003).
 b If rubbing is found and chips were not found on the chip
_
 detector:

 - replace the alternator rotor and stator (Ref. AMM TASK 73-21-30-000-001) and (Ref. AMM TASK 73-21-30-400-001).
 c If no rubbing is noted:
_

 - reinstall the alternator stator (Ref. AMM TASK 73-21-30-400-001).
 (c) Replace the HJ10 harness (Ref. AMM TASK 73-21-50-000-043) and (Ref. AMM TASK 73-21-50-400-043).
 1 If fault continues during the subsequent flights:
_

 - replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
 F 『R EEFF : 051-055, 057-057, 059-060, 106-149, E ∞∞77-10-00∞∞∞∞∞∞∞∞∞∞Page A202
 E E212-299, 301-399, 401-499, Aug 01/05 E E ECES
E F 『 E C F M E E E E 56 E E E (3) If the failure message ALT, J10, ECU is confirmed:

 - disconnect the HJ10 harness from the alternator stator (ALT-A) (located in the left core compartment).
 (a) Visually examine the alternator stator receptacle and the HJ10 harness connector for damaged pins or contamination (Ref. AMM TASK 73-21-50-210-002).
 1 If harness or alternator stator connector is damaged:
_ - repair or replace as required.

 2 If no damage is found:
_

 - do an electrical resistance test through the alternator stator connector between: . pins 2 and 5 (<1 Ohm) . pins 3 and 5 (<1 Ohm) . pins 4 and 5 (<1 Ohm) . pin 5 and the ground (>10 Megohms).
 a If the resistance values are out of the specified limits:
_

 - replace the alternator stator (Ref. AMM TASK 73-21-30-000-001) and (Ref. AMM TASK 73-21-30-400-001).
 b If the resistance values are in the specified limits:
_ - reconnect the HJ10 harness to the alternator stator.

 (b) Disconnect the HJ10 harness from the ECU (4000KS) receptacle.

 (c) Visually examine the ECU (4000KS) receptacle and the HJ10 harness connector for damaged pins or contamination (Ref. AMM TASK 73-21-50-210-002).

 1 If harness connector or ECU receptacle is damaged:
_ - repair or replace as required.

 2 If no damage is found:
_

 - do an electrical resistance test through the HJ10 harness between: . pins 5 and 13 (<1 ohm) . pins 5 and 14 (<1 ohm) . pins 5 and 15 (<1 ohm) . pins 5 and 4 (>10 megohms) . pins 13 and 4 (>10 megohms) . pins 14 and 4 (>10 megohms) . pins 15 and 4 (>10 megohms) . pin 5 and the ground (>10 megohms).
 a If the resistance values are out of the specified limits:
_

 - replace the HJ10 harness (Ref. AMM TASK 73-21-50-000-043) and (Ref. AMM TASK 73-21-50-400-043).
 F 『R EEFF : 051-055, 057-057, 059-060, 106-149, E ∞∞77-10-00∞∞∞∞∞∞∞∞∞∞Page A203
 E E212-299, 301-399, 401-499, Aug 01/05 E E ECES
E

 F  『
 E  C F M  E
 E  E

 E 56 E
 E E
 b 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).
 **ON A/C ALL

 B. Do the test given in Para. 3.A.
 (1) No additional maintenance action is required if the fault is not confirmed.

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

 F 『 EEFF : ALL E ∞∞77-10-00∞∞∞∞∞∞∞∞∞∞Page A204
　
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