Loss of the Command Inputs (ENG 1/ENG 2)
 1. Possible Causes
_______________
 - WHC-1 (2DG1)

 - RELAY-OIL LOW PRESS AND GROUND, ENG1 (12KS1)

 - RELAY-OIL LOW PRESS AND GROUND, ENG2 (12KS2)

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 30-42-00-710-001 Operational Test of the Windshield Anti-Icing and Defogging AMM 30-42-34-000-001 Removal of the Window Heat Computer (WHC) (2DG1,2DG2). AMM 30-42-34-400-001 Installation of the Window Heat Computer (WHC) (2DG1,2DG2). ASM 30-42/01
 3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the windshield anti-icing and defogging (Ref. AMM TASK 30-42-00-710-001).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message CHECK EIU - WHC 1 INTERFACE:
 - do a check for ground at pin B/Y and/or pin B/Z of the WHC 1 (2DG1).
 (1) If there is ground:

 - replace the WHC-1 (2DG1), (Ref. AMM TASK 30-42-34-000-001) and (Ref. AMM TASK 30-42-34-400-001).

 (2) If there is no ground:

 - replace the RELAY-OIL LOW PRESS AND GROUND, ENG1 (12KS1).
 (a) If the fault continues:
 - replace the RELAY-OIL LOW PRESS AND GROUND, ENG2 (12KS2).
 Aug 01/05R CES

 (b) If the fault continues:
 1 Do a check and repair the wiring:
_
 - from the WHC 1 (2DG1) pin B/Y to the relay (12KS1) pin A/2

 - from the relay (12KS1) pin A/A to the ground

 - from the WHC 1 (2DG1) pin B/Z to the relay (12KS2) pin A/2 and

 - from the relay (12KS2) pin A/A to the ground. (Ref. ASM 30-42/01)

 B. Do the operational test given in Para. 3.
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞30-42-00∞∞∞∞∞∞∞∞∞∞Page 279
 Aug 01/05R
 CES  Loss of the Command Inputs (ENG 1/ENG 2)

 1. Possible Causes
_______________
 - WHC-2 (2DG2)

 - RELAY-OIL LOW PRESS AND GROUND, ENG1 (10KS1)

 - RELAY-OIL LOW PRESS AND GROUND, ENG2 (10KS2)

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 30-42-00-710-001 Operational Test of the Windshield Anti-Icing and Defogging AMM 30-42-34-000-001 Removal of the Window Heat Computer (WHC) (2DG1,2DG2). AMM 30-42-34-400-001 Installation of the Window Heat Computer (WHC) (2DG1,2DG2). ASM 30-42/02
 3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the windshield anti-icing and defogging (Ref. AMM TASK 30-42-00-710-001).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message CHECK EIU WHC 2 INTERFACE:
 - do a check for ground at pin B/Y and/or pin B/Z of the WHC 2 (2DG2).
 (1) If there is ground:

 - replace the WHC-2 (2DG2), (Ref. AMM TASK 30-42-34-000-001) and (Ref. AMM TASK 30-42-34-400-001).

 (2) If there is no ground:

 - replace the RELAY-OIL LOW PRESS AND GROUND, ENG1 (10KS1).
 (a) If the fault continues:
 - replace the RELAY-OIL LOW PRESS AND GROUND, ENG2 (10KS2).
 Aug 01/05R CES

 (b) If the fault continues:
 1 Do a check and repair the wiring:
_
 - from the WHC 2 (2DG2) pin B/Y to the relay (10KS1) pin A/2

 - from the relay (10KS1) pin A/A to the ground

 - from the WHC 2 (2DG2) pin B/Z to the relay (10KS2) pin A/2 and

 - from the relay (10KS2) pin A/A to the ground. (Ref. ASM 30-42/02)

 B. Do the operational test given in Para. 3.
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞30-42-00∞∞∞∞∞∞∞∞∞∞Page 281
　
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