ignition INFINITI QX56 2007 Factory Service Manual

REAR WIPER AND WASHER SYSTEM
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3. Perform the Preliminary Check. Refer to WW-31, "Preliminary Check".
4. Check symptom and repair or replace the cause of malfunction.
5. Does the rear wiper operate normally? If YES: GO TO 6. If NO: GO TO 4.
6. Inspection End.
Preliminary CheckINFOID:0000000003533575
INSPECTION FOR POWER SUPPLY AND GROUND CIRCUIT
Inspection procedure
1.CHECK FUSE
Check if wiper or washer fuse is blown.
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of blown fuse before installing new fuse.
2.CHECK POWER SUPPLY CIRCUIT
1. Disconnect BCM connectors.
2. Check voltage between BCM harness connector terminals and
ground.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open or short between BCM and fuse.
3.GROUND CIRCUIT INSPECTION (BCM)
Check for continuity between the BCM terminal and ground.
OK or NG
OK >> Inspection End.
NG >> Repair/replace BCM ground circuit.
CONSULT-II Function (BCM)INFOID:0000000003533576
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
Unit Power source Fuse No.
Front and rear washer motor Ignition ON or START 9
BCMIgnition ON or START 59
Battery f
Terminals Ignition switch position
(+)
(–) OFF ON
Connector Terminal
M18 38
Ground0V Battery voltage
M20 70 Battery voltage Battery voltage
WKIA2089E
Te r m i n a l s
Ignition switch
conditionContinuity
Connector Terminal
M20 67 Ground OFF Yes
WKIA2090E

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REAR WIPER AND WASHER SYSTEM
CONSULT-II START PROCEDURE
Refer to GI-36, "CONSULT-II Start Procedure".
DATA MONITOR
Display Item List
ACTIVE TEST
Display Item List
BCM diagnostic
test itemDiagnostic mode Description
Inspection by partWORK SUPPORTSupports 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.
All signals Monitors all the items.
Selection from menu Selects and monitors the individual item selected.
Monitor item name
"OPERATION OR UNIT"Contents
IGN ON SW "ON/OFF" Displays "IGN Position (ON)/OFF, ACC Position (OFF)" status as judged from ignition switch signal.
IGN SW CAN "ON/OFF" Displays "IGN Position (ON)/OFF, ACC Position (OFF)" status as judged from CAN communications.
FR WIPER INT "ON/OFF" Displays "Front Wiper INT (ON)/Other (OFF)" status as judged from wiper switch signal.
FR WIPER LOW "ON/OFF" Displays "Front Wiper LOW (ON)/Other (OFF)" status as judged from wiper switch signal.
FR WIPER HI "ON/OFF" Displays "Front Wiper HI (ON)/Other (OFF)" status as judged from wiper switch signal.
FR WASHER SW "ON/OFF" Displays "Front Washer Switch (ON)/Other (OFF)" status as judged from wiper switch signal.
INT VOLUME (1 - 7) Displays intermittent operation dial position setting (1 - 7) as judged from wiper switch signal.
VEHICLE SPEED "0.0 km/h" Displays vehicle speed as received over CAN communication.
FR WIPER STOP "ON/OFF" Displays "Stopped (ON)/Operating (OFF)" status as judged from the auto stop signal.
RR WIPER INT "ON/OFF" Displays "Rear Wiper INT (ON)/Other (OFF)" status as judged from wiper switch signal.
RR WIPER ON "ON/OFF" Displays "Rear Wiper (ON)/Other (OFF)" status as judged from wiper switch signal.
RR WASHER SW "ON/OFF" Displays "Rear Washer Switch (ON)/Other (OFF)" status as judged from wiper switch signal.
RR WIPER STOP "ON/OFF" Displays "Stopped (OFF)/Operating (ON)" status as judged from the auto stop switch 1.
RR AUTO STP 2 "ON/OFF" Displays "Stopped (OFF)/Operating (ON)" status as judged from the auto stop switch 2.
Test item Display on CONSULT-II screen Description
Front wiper HI output FR WIPER (HI) Front wiper HI can be operated by any ON-OFF operation.
Front wiper LO output FR WIPER (LO) Front wiper LO can be operated by any ON-OFF operation.
Front wiper INT output FR WIPER (INT) Front wiper INT can be operated by any ON-OFF operation.
Rear wiper output RR WIPER Rear wiper can be operated by any ON-OFF operation.

REAR WIPER AND WASHER SYSTEM
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Rear Wiper Does Not OperateINFOID:0000000003533577
1.REAR WIPER ACTIVE TEST
1. Select "BCM" on CONSULT-II, and select "WIPER" on "SELECT
TEST ITEM" screen.
2. Select "ACTIVE TEST" on "SELECT DIAG MODE" screen.
3. Select "RR WIPER" on "SELECT TEST ITEM" screen.
4. Make sure rear wiper operates.
OK or NG
OK >> GO TO 7.
NG >> GO TO 2.
2.CHECK REAR WIPER MOTOR CIRCUITS
1. Turn ignition switch OFF.
2. Disconnect BCM connector and rear wiper motor connector.
3. Check continuity between BCM harness connector terminals
and rear wiper motor harness connector terminals.
OK or NO
OK >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK GLASS HATCH AJAR SWITCH
1. Make sure hatch glass is closed.
2. Check continuity between BCM connector M19 terminal 42 and
ground.
OK or NG
OK >> GO TO 4.
NG >> Repair harness if shorted. If not, refer to BL-25, "
Door
Switch Check" for further glass hatch ajar switch diagno-
sis.
4.CHECK REAR WIPER MOTOR AUTO STOP CIRCUITS
1. Disconnect BCM connector M18.
2. Check continuity between BCM harness connector terminals
and rear wiper motor harness connector terminals.
OK or NO
OK >> GO TO 5.
NO >> Repair harness or connector.Wiper should operate.
SKIA3503E
BCM Rear wiper motor
Continuity
Connector Terminal Connector Terminal
M1955
D7044
Ye s
54 6
WKIA1413E
42 - Ground : Continuity should not exist.
WKIA1414E
BCM Rear wiper motor
Continuity
Connector Terminal Connector Terminal
M18 26
D7041
Ye s
M19 44 2
WKIA1415E

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REAR WIPER AND WASHER SYSTEM
5.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 6.
NG >> Repair harness or connector.
6. CHECK REAR WIPER OPERATING
1. Connect BCM connectors and rear wiper motor connector.
2. Turn ignition switch ON.
3. Select “RR WIPER” during "ACTIVE TEST". Refer to WW-31,
"CONSULT-II Function (BCM)". When rear wiper is operating,
check voltage between BCM connector terminals and ground.
OK or NG
OK >> Replace rear wiper motor. Refer to WW-37, "Rear Wiper Motor".
NG >> Replace BCM. Refer to BCS-24, "
BCM".
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-24, "BCM".
NG >> Check the wiper switch. Refer to BCS-3, "
System
Description".
Rear Wiper Stop Position Is IncorrectINFOID:0000000003533578
1.CHECK AUTO STOP SWITCH INPUT SIGNALS
Rear wiper motor
Continuity
Connector Terminal
D7043
Ground Yes
5
WKIA1416E
BCM
(–) ConditionVo l ta g e
(Approx.) (+)
Connector Terminal
M1954
GroundOperating Fluctuating
55End of travel
(stopped)0V
WKIA1417E
When wiper switch is in
INT position: RR WIPER INT ON
When wiper switch is in
ON position: RR WIPER ON
SKIA4243E

REAR WIPER AND WASHER SYSTEM
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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-24, "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.
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 OPERATINGWhen 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
Te r m i n a l s
Continuity
Connector Terminal
M18 26
Ground No
M19 44
WKIA2096E
Te r m i n a l s
Continuity
Connector Terminal
D7041
GroundNo
2
3
Ye s
5
WKIA2097E

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REAR WIPER AND WASHER SYSTEM
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-37, "Rear Wiper
Motor".
NG >> Replace BCM. Refer to BCS-24, "
BCM".
Only Rear Wiper Does Not OperateINFOID:0000000003533579
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-24, "BCM".
NG >> Check the wiper switch. Refer to BCS-3, "
System
Description".
Only Rear Wiper Intermittent Does Not OperateINFOID:0000000003533580
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-24, "BCM".
NG >> Check the wiper switch. Refer to BCS-3, "
System
Description".
Wiper Does Not Wipe When Rear Washer OperatesINFOID:0000000003533581
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-24, "BCM".
NG >> Check the wiper switch. Refer to BCS-3, "
System
Description". Battery voltage should exist on the reverse wipe un-
til arm is seated in the stop.
WKIA2098E
When rear wiper switch is in
ON position: RR WIPER ON ON
SKIA4248E
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