(1) Remove the WHC-2 (2DG2) (Ref. AMM TASK 30-42-34-000-001).
(2) Do a check for 28VDC at pins C and S of the connector 2DG2-B on the wiring side at the same time.
(a) If there is 28VDC at pins C and S at the same time:
- there is an unwanted 28VDC at pin C
- repair the wiring.
(b) If there is no 28VDC at pins C and S at the same time:
- replace the WHC-2 (2DG2) (Ref. AMM TASK 30-42-34-000-001) and (Ref. AMM TASK 30-42-34-400-001).
WINDSHIELD RAIN PROTECTION - FAULT ISOLATION PROCEDURES
_______________________________________________________
TASK 30-45-00-810-801
R One or Both Wipers Inoperative
1. Possible Causes
_______________
R
- CTL SW-WIPER, CAPT (5DB1) R - CTL SW-WIPER, F/O (5DB2) R - MOTOR CONVERTER-WIPER, CAPT (6DB1) R - MOTOR CONVERTER-WIPER, F/O (6DB2) R - wiring R
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 30-45-00-720-001 Functional Test of the Windshield Rain Protection. AMM 30-45-51-000-001 Removal of the Wiper Motor Converter (6DB1, 6DB2) AMM 30-45-51-400-001 Installation of the Wiper Motor Converter (6DB1,
6DB2)
ASM 30-45/01
3. Fault Confirmation
__________________
A. Test Do the functional test of the windshield rain protection (Ref. AMM TASK 30-45-00-720-001).
4. Fault Isolation
_______________
A. Table of the circuit breakers used in this procedure:
-------------------------------------------------------------------------------
PANEL DESIGNATION IDENT. LOCATION
-------------------------------------------------------------------------------
R 122VU ANTI ICE/F/O/WIPER 4DB2 W12 122VU ANTI ICE/WIPER/CAPT 4DB1 X12
「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 ∞∞30-45-00∞∞∞∞∞∞∞∞∞∞Page 201
Aug 01/00 CES
R B. If the wiper(s) does(do) not operate:
R - do a check for 28VDC at pin A of the wiper motor converter 6DB1(6DB2)
R (Ref. ASM 30-45/01).
R (1) If there is no 28VDC:
R - do a check and repair the wiring from pin 2 of the circuit breaker
R 2DB1(2DB2) to pin A of the wiper motor converter 6DB1(6DB2).
R - On the panel 21VU(22VU), set the WIPER control switch to SLOW.
R (2) If there is 28VDC:
R - do a check for ground at pin C of the wiper motor converter
R 6DB1(6DB2).
R (a) If there is no ground signal:
R - do a check of the wiring from pin C of the wiper motor
R converter 6DB1(6DB2) to pin 3 of the WIPER control switch
R 5DB1(5DB2).
R 1 If there is no continuity:_
R - repair the above wiring.
R 2 If there is continuity:_
R - replace the CTL SW-WIPER, CAPT (5DB1) (CTL SW-WIPER, F/O
R (5DB2)).
R (b) If there is a ground signal:
R - replace the MOTOR CONVERTER-WIPER, CAPT (6DB1) (MOTOR
R CONVERTER-WIPER, F/O (6DB2)) (Ref. AMM TASK 30-45-51-000-001)
R and (Ref. AMM TASK 30-45-51-400-001).
R
C. Do the test given in Para. 3.
Only One Wiper Speed is Available
1. Possible Causes
_______________
- CTL SW-WIPER, CAPT (5DB1)
- CTL SW-WIPER, F/O (5DB2)
- MOTOR CONVERTER-WIPER, CAPT (6DB1)
- MOTOR CONVERTER-WIPER, F/O (6DB2)
- wiring from pin 2 of the circuit breaker 4DB1(4DB2) to pin A of the wiper motor converter 6DB1(6DB2)
- wiring from pin C of the wiper motor converter 6DB1(6DB2) to pin 3 of the WIPER control switch 5DB1(5DB2)
- wiring from pin E of the wiper motor converter 6DB1(6DB2) to pin 4 of the WIPER control switch 5DB1(5DB2)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 30-45-00-720-001 Functional Test of the Windshield Rain Protection. R AMM 30-45-51-000-001 Removal of the Wiper Motor Converter (6DB1, 6DB2) R AMM 30-45-51-400-001 Installation of the Wiper Motor Converter (6DB1, R 6DB2)
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