- On the left or right MCDU, get access to the ENGINE MAIN MENU screen.
- On the MCDU, push the line key (4R) adjacent to the applicable Specific tests indication.
- push the line key (5L) adjacent to the SEC RELAY STATUS:
(1) If MCDU screen indicates SEC RELAY OPEN, the failure is not confirmed.
- No further action is required
(2) If MCDU screen indicates SEC RELAY CLOSED, the failure is confirmed.
- Do the step 4. Fault Isolation
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4. Fault Isolation
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A. If MCDU screen indicates SEC RELAY CLOSED:
- Pull C/B 24KS2
- Push the line key (6L) adjacent to "RETURN" and re-select the SEC RELAY STATUS page:
(1) If MCDU screen indicates SEC RELAY CLOSED:
- Replace the Relay (28KS2).
(a) If the fault continues:
- Remove the EIU
- Do a check for a ground signal at pin E2 of the EIU rack-connector AA:
1 If there is no ground signal:
_
- replace the EIU (1KS2) (Ref. AMM TASK 73-25-34-000-040) and (Ref. AMM TASK 73-25-34-400-040).
2 If there is a ground signal:
_
- Repair the wiring between EIU connector AA and 28KS2 (Ref. ASM 73-25/08).
(2) If MCDU screen indicates SEC RELAY OPEN:
- Replace the Relay (27KS2).
(a) If the fault continues:
- Pull C/B 21CE1 and 21CE2.
- Push the line key (6L) adjacent to "RETURN" and re-select the SEC RELAY STATUS page:
1 If SEC RELAY CLOSED is displayed:
_
- Repair the wiring between SEC1/2 and 27KS2 (Ref. ASM 73-25/23).
2 If SEC RELAY OPEN is displayed:
_
- push back C/B 21CE1 and Re-select MCDU SEC RELAY STATUS page:
a If SEC RELAY CLOSED is displayed:
_
- replace the SEC1 (Ref. AMM TASK 27-94-34-000-001) and (Ref. AMM TASK 27-94-34-400-001).
b If SEC RELAY OPEN is displayed:
_
- replace the SEC2 (Ref. AMM TASK 27-94-34-000-001) and (Ref. AMM TASK 27-94-34-400-001).
B. Do the test given in Para. 3.A.
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TASK 73-20-00-810-984
Loss of TCM information between EIU and ECU
1. Possible Causes
_______________
- EIU (1KS1)
- ECU (4000KS)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
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 73-25-34-000-040 Removal of the Engine Interface Unit (EIU)
AMM 73-25-34-400-040 Installation of the Engine Interface Unit (EIU)
AMM 73-29-00-710-040 Operational Test of the FADEC on the Ground (with
Engine Motoring)
ASM 73-25/08
3. Fault Confirmation
__________________
A. Test
(1) Do the operational test of the FADEC on the ground (with engine motoring) (Ref. AMM TASK 73-29-00-710-040).
4. Fault Isolation
_______________
A. If the test gives the maintenance message EIU(150), J3:
- Remove EIU
- Disconnect J3 harness from ECU
- Do a continuity check between: . pins 5C from EIU receptacle connector AB and 22 from J3 harness . pins 5A from EIU receptacle connector AB and 23 from J3 harness
(1) If there is continuity:
- Replace EIU (1KS1) (Ref. AMM TASK 73-25-34-000-040) (Ref. AMM TASK 73-25-34-400-040).
(a) If the fault continues:
- Replace ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) (Ref. AMM TASK 73-21-60-400-001).
(2) If there is no continuity:
- repair or replace the wiring as required (Ref. ASM 73-25/08).
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本文鏈接地址：A320 Trouble Shooting Manual 排故手冊(cè) 發(fā)動(dòng)機(jī)燃油和控制 2(4)
