2006 INFINITI QX56 Factory Service Manual

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INFINITI QX56 2006 Factory Service Manual WW-34
REAR WIPER AND WASHER SYSTEM
Revision: November 20092006 QX56
The BCM controls rear wiper motor operation by switching direction of current flow between the two rear wiper
motor output circuits.

WW-34
REAR WIPER AND WASHER SYSTEM
Revision: November 20092006 QX56
The BCM controls rear wiper motor operation by switching direction of current flow between the two rear wiper
motor output circuits.
Power is supplied to output circuit 1 for forward operation (counterclockwise sweep),
through BCM terminal 55
to rear wiper motor terminal 4.
Ground is supplied
to rear wiper motor terminal 6
through BCM terminal 54
through BCM terminal 67
through grounds M57, M61 and M79.
With output circuit 1 power and ground supplied, the rear wiper motor operates in a counterclockwise sweep
direction until auto stop switch 1 closes (full sweep position). Auto stop switch 1 supplies ground
to BCM terminal 44
through rear wiper motor terminal 2
through rear wiper motor terminal 5
through grounds B117 and B132.
When the BCM receives this ground signal it turns off output circuit 1 and turns on output circuit 2.
Power is supplied to output circuit 2 for reverse operation (clockwise sweep),
through BCM terminal 54
to rear wiper motor terminal 6.
Ground is supplied
to rear wiper motor terminal 4
through BCM terminal 55
through BCM terminal 67
through grounds M57, M61 and M79.
With output circuit 2 power and ground supplied the rear wiper motor operates in a clockwise sweep direction
until auto stop switch 2 closes (full sweep position). Auto stop switch 2 supplies ground
to BCM terminal 26
through rear wiper motor terminal 1
through rear wiper motor terminal 3
through grounds B117 and B132.
When the BCM receives this ground signal it turns off output circuit 2 and starts the timing function of 7 sec-
onds. After approximately 7 seconds the BCM turns on output circuit 1. This process repeats until the rear
wiper switch or ignition switch is turned off.
AUTO STOP OPERATION
When the rear wiper switch is turned off, the BCM will continue the cycle of output circuit 1 or output circuit 2
until auto stop switch 1 and auto stop switch 2 are both in the closed position. When the BCM receives ground
signals from auto stop switch 1 and auto stop switch 2 simultaneously, output circuit 1 and output circuit 2 are
both turned off.
REAR WASHER OPERATION
When the ignition switch is in the ON or START position, and the front and rear washer switches are OFF, the
front and rear washer motor is supplied power
through 10A fuse (No. 9, located in the fuse block J/B)
through combination switch (wiper switch) terminal 14
through combination switch (wiper switch) terminal 11
to front and rear washer motor terminal 2, and
through combination switch (wiper switch) terminal 13
to front and rear washer motor terminal 1.
When the rear wiper switch is in rear washer position, the BCM detects a rear washer signal by BCM wiper
switch reading function. Combination switch ground is supplied
to front and rear washer motor terminal 1

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INFINITI QX56 2006 Factory Service Manual REAR WIPER AND WASHER SYSTEMWW-35
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Revision: November 2009 2006 QX56
through combination switch (wiper switch) terminal 13
through combination switch (wiper switch) terminal

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INFINITI QX56 2006 Factory Service Manual WW-36
REAR WIPER AND WASHER SYSTEM
Revision: November 20092006 QX56
Wiring Diagram — WIP/R —EKS00BED
WKWA2328E

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INFINITI QX56 2006 Factory Service Manual REAR WIPER AND WASHER SYSTEMWW-37
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Revision: November 2009 2006 QX56
WKWA3612E

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INFINITI QX56 2006 Factory Service Manual WW-38
REAR WIPER AND WASHER SYSTEM
Revision: November 20092006 QX56
Terminals and Reference Values for BCMEKS00BEE
Te r m i -
nal No. Wire
color Signal name Measuring condition
Reference Value (V)
(A

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Revision: November 2009 2006 QX56
33 R/Y Combination switch output 4 ONLight switch and wiper switch OFF
Wiper dial position 4
34 L Combin

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INFINITI QX56 2006 Factory Service Manual WW-40
REAR WIPER AND WASHER SYSTEM
Revision: November 20092006 QX56
How to Proceed With Trouble DiagnosisEKS00BEF
1. Confirm the symptoms and customer complaint.
2. Understand operation description an

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2. CHECK POWER SUPPLY CIRCUIT
1. Disconnect BCM connectors.
2. Check voltage between BCM harness connecto

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