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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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REAR WIPER AND WASHER SYSTEM
Revision: November 20092006 QX56
CONSULT-II Function (BCM)EKS00BEH
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II OPERATION
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.
1. With the ignition switch OFF, connect CONSULT-II and CON-
SULT-II CONVERTER to the data link connector, then turn the
ignition switch ON.
2. Touch "START (NISSAN BASED VHCL)".
3. Touch "BCM" on the "SELECT SYSTEM" screen. If "BCM" is not indicated, go to GI-40, "
CONSULT-II Data Link
Connector (DLC) Circuit" .
BCM diagnostic
test item Diagnostic mode
Description
Inspection by part WORK SUPPORT
Supports inspections and adjustments. Commands are transmitted to the BCM
for setting the status suitable for required operation, input/output signals are
received from the BCM and received data is displayed.
DATA MONITOR Displays BCM input/output data in real time. ACTIVE TEST Operation of electrical loads can be checked by sending drive signal to them.
SELF-DIAG RESULTS Displays BCM self-diagnosis results.
CAN DIAG SUPPORT MNTR The result of transmit/receive diagnosis of CAN communication can be read. ECU PART NUMBER BCM part number can be read.CONFIGURATION Performs BCM configuration read/write functions.
BBIA0369E
BCIA0029E
BCIA0030E
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REAR WIPER AND WASHER SYSTEM
Revision: November 20092006 QX56
7. CHECK COMBINATION SWITCH INPUT SIGNAL
Select "BCM" on CONSULT-II. With "WIPER" data monitor, make
sure "RR WIPER INT", "RR WIPER ON" turn ON-OFF according to
operation of wiper switch.
OK or NG
OK >> Replace BCM. Refer to BCS-20, "BCM" .
NG >> Check the wiper switch. Refer to WW-6, "
COMBINA-
TION SWITCH READING FUNCTION" .
Rear Wiper Stop Position Is IncorrectEKS00BEJ
1. CHECK AUTO STOP SWITCH INPUT SIGNALS
Select "BCM" on CONSULT-II. With "WIPER" data monitor, make
sure "RR WIPER STOP" and "RR AUTO STOP 2" turn ON-OFF
according to wiper operation.
OK or NG
OK >> Replace BCM. Refer to BCS-20, "BCM" .
NG >> GO TO 2.
2. CHECK AUTO STOP CIRCUITS FOR SHORT TO GROUND
1. Turn ignition switch to OFF.
2. Disconnect BCM and rear wiper motor connectors.
3. Check continuity between BCM harness connector terminals and ground.
OK or NO
OK >> GO TO 3.
NO >> Repair harness or connector. When wiper switch is in
INT position
: RR WIPER INT ON
When wiper switch is in
ON position : RR WIPER ON
SKIA4243E
When wiper switch is OFF
and arm on stop : RR WIPER STOP ON
: RR AUTO STOP 2 ON
When wiper switch is ON and arm in position A : RR WIPER STOP OFF
: RR AUTO STOP 2 ON
When wiper switch is ON counterclockwise sweep : RR WIPER STOP OFF
: RR AUTO STOP 2 OFF
When wiper switch is ON and arm in position B : RR WIPER STOP ON
: RR AUTO STOP 2 OFF
When wiper switch is ON clockwise sweep : RR WIPER STOP OFF
: RR AUTO STOP 2 OFF
When wiper switch is ON and arm in position A : RR WIPER STOP ON
: RR AUTO STOP 2 OFF
WKIA1418E
Terminals
Continuity
Connector Terminal
M18 26
Ground No
M19 44
WKIA2096E
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REAR WIPER AND WASHER SYSTEMWW-47
C
DE
F
G H
I
J
L
M A
B
WW
Revision: November 2009 2006 QX56
3. CHECK REAR WIPER MOTOR AUTO STOP SWITCH GROUNDS
Check continuity between rear wiper motor harness connector D704
terminals and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connector.
4. CHECK REAR WIPER OPERATING
1. Connect BCM connectors and rear wiper motor connector.
2. Turn ignition switch ON.
3. Turn rear wiper switch ON, then to OFF when wiper arm reaches mid sweep.
4. Check voltage between rear wiper motor connector D704 termi- nal 6 and ground.
OK or NG
OK >> Replace rear wiper motor. Refer to WW-50, "Rear Wiper
Motor" .
NG >> Replace BCM. Refer to BCS-20, "
BCM" .
Only Rear Wiper Does Not OperateEKS00BEK
1. CHECK COMBINATION SWITCH INPUT SIGNAL
Select "BCM" on CONSULT-II. With "WIPER" data monitor, make
sure "RR WIPER ON" turns ON-OFF according to operation of wiper
switch.
OK or NG
OK >> Replace BCM. Refer to BCS-20, "BCM" .
NG >> Check the wiper switch. Refer to WW-6, "
COMBINA-
TION SWITCH READING FUNCTION" .
Terminals
Continuity
Connector Terminal
D704 1
Ground No
2
3
Ye s
5
WKIA2097E
Battery voltage should exist on the reverse wipe
until arm is seated in the stop.
WKIA2098E
When rear wiper switch is in
ON position : RR WIPER ON ON
SKIA4248E
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REAR WIPER AND WASHER SYSTEM
Revision: November 20092006 QX56
Only Rear Wiper Intermittent Does Not OperateEKS00BEL
1. CHECK COMBINATION SWITCH INPUT SIGNAL
Select "BCM" on CONSULT-II. With "WIPER" data monitor, make
sure "RR WIPER INT" turns ON-OFF according to operation of wiper
switch.
OK or NG
OK >> Replace BCM. Refer to BCS-20, "BCM" .
NG >> Check the wiper switch. Refer to WW-6, "
COMBINA-
TION SWITCH READING FUNCTION" .
Wiper Does Not Wipe When Rear Washer OperatesEKS00BEM
1. CHECK COMBINATION SWITCH INPUT SIGNAL
Select "BCM" on CONSULT-II. With "WIPER" data monitor, make
sure "RR WASHER SW" turns ON-OFF according to operation of
rear washer switch.
OK or NG
OK >> Replace BCM. Refer to BCS-20, "BCM" .
NG >> Check the wiper switch. Refer to WW-6, "
COMBINA-
TION SWITCH READING FUNCTION" .
When rear wiper switch is in
INT position
: RR WIPER INT ON
SKIA4249E
When rear wiper switch is in
WASHER position: RR WASHER SW ON
SKIA4250E
