DEU-1 (Tilt "-4") D189B  D3973B
pinB3 ------------------pinC7 pinB4 ------------------pinD7

DEU-2 (Tilt D189B D3975B
"+4")

pinJ3 -------------------pinC7 pinJ4 -------------------pinD7

(d)  If you find a problem with the wiring, then do these steps: 1) Repair the wiring. 2) Re-install the weather radar receiver/transmitter, M101. To install it, do this task:
Weather Radar Receiver/Transmitter Installation, AMM TASK 34-43-41-400-801. 3) Re-install the DEU, M1808 (DEU-1) or M1809 (DEU-2). To install it, do this task: Display Electronic Unit Installation, AMM TASK 31-62-21-400-801. 4) Do this task: Weather Radar (WXR) System -Operational Test, AMM
TASK 34-43-00-710-802-001 or Weather Radar (WXR) System -Operational Test,
AMM TASK 34-43-00-710-803-002.
a) If the weather radar operational test passes, then you corrected the fault.

(e)  If you do not find a problem with the wiring, then continue.
1)  Re-install the weather radar receiver/transmitter, M101. To install it, do this task: Weather Radar Receiver/Transmitter Installation, AMM TASK 34-43-41-400-801.
2)  Re-install the DEU, M1808 (DEU-1) or M1809 (DEU-2). To install it, do this task: Display Electronic Unit Installation, AMM TASK 31-62-21-400-801.
SIL 014, 015, 020
(3)  Do this check of the wiring between the applicable DEU and the Left (Right) weather radar receiver/transmitter:
(a)  
Remove the Left (Right) weather radar receiver/transmitter, M101 (M460). To remove it, do this task: Weather Radar Receiver/Transmitter Removal, AMM TASK 34-43-41-000-801.

(b)  
Remove the DEU, M1808 (DEU-1) or M1809 (DEU-2). To remove it, do this task: Display Electronic Unit Removal, AMM TASK 31-62-21-000-801.

(c)  
Do a wiring check between these pins on connector D189B (D673B) of the Left (Right) weather radar receiver/transmitter, in the forward equipment center, and connector D3973B (DEU-1) or D3975B (DEU-2) at the E3-1 shelf (WDM 34-41-11).

EFFECTIVITY SIL ALL  34-43 TASK 816 
D633A103-SIL BOEING PROPRIETARY -Copyright # Unpublished Work -See title page for details  Page 252 Feb 15/2011 

DEU-1 (Tilt "-4") D189B (D673B)  D3973B
(D3973B)

pinB3(B3) ---------------pinC7(C7) pinB4(B4) ---------------pinD7(D7)

DEU-2 (Tilt D189B (D673B) D3975B
"+4") (D3973B)

pinJ3(J3) ----------------pinC7(C7) pinJ4(J3) ----------------pinD7(D7)

(d)  
If you find a problem with the wiring, then do these steps: 1) Repair the wiring. 2) Re-install the Left (Right) weather radar receiver/transmitter, M101 (M460). To install it,

do this task: Weather Radar Receiver/Transmitter Installation, AMM TASK 34-43-41-400-801. 3) Re-install the DEU, M1808 (DEU-1) or M1809 (DEU-2). To install it, do this task: Display Electronic Unit Installation, AMM TASK 31-62-21-400-801. 4) Do this task: Weather Radar (WXR) System -Operational Test, AMM TASK 34-43-00-710-802-001. a) If the weather radar operational test passes, then you corrected the fault.

(e)  
If you do not find a problem with the wiring, then continue.

1)  Re-install the Left (Right) weather radar receiver/transmitter, M101 (M460). To install it, do this task: Weather Radar Receiver/Transmitter Installation, AMM TASK 34-43-41-400-801.
2)  Re-install the DEU, M1808 (DEU-1) or M1809 (DEU-2). To install it, do this task: Display Electronic Unit Installation, AMM TASK 31-62-21-400-801.
SIL ALL
(4) Replace the weather radar receiver/transmitter. To replace it, These are the tasks: Weather Radar Receiver/Transmitter Removal, AMM TASK 34-43-41-000-801, Weather Radar Receiver/Transmitter Installation, AMM TASK 34-43-41-400-801.
(a)  Do this task: Weather Radar (WXR) System -Operational Test, AMM TASK 34-43-00-710-802-001 or Weather Radar (WXR) System -Operational Test, AMM TASK 34-43-00-710-803-002.
　
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