relay INFINITI QX56 2006 Factory Service Manual

FRONT WIPER AND WASHER SYSTEMWW-5
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Revision: November 2009 2006 QX56

to BCM terminal 67 and

to combination switch terminal 12

through grounds M57, M61 and M79, and

to IPDM E/R terminals 38 and 59 and

to front wiper motor terminal 1

through grounds E9, E15, and E24.
LOW SPEED WIPER OPERATION
When the ignition switch is in the ON or START position, and the front wiper switch is turned to the low posi-
tion, the BCM detects a low speed wiper ON request through the combination switch (wiper switch) reading
function. The BCM then sends a front wiper (low) request signal over CAN communication lines

from BCM terminals 39 and 40

to IPDM E/R terminals 39 and 40.
When IPDM E/R receives front wiper (low) request signal, it supplies ground to energize the front wiper relay.
With the front wiper relay energized, power is supplied

through front wiper relay

to front wiper high relay

through IPDM E/R terminal 32

to front wiper motor terminal 3.
With power and ground supplied, the front wiper motor operates at low speed.
HI SPEED WIPER OPERATION
When the ignition switch is in the ON or START position, and the front wiper switch is turned to the high posi-
tion, the BCM detects a high speed wiper ON request through the combination switch (wiper switch) reading
function. The BCM then sends a front wiper (high) request signal over CAN communication lines

from BCM terminals 39 and 40

to IPDM E/R terminals 39 and 40.
When the IPDM E/R receives a front wiper (high) request signal, it supplies ground to energize the front wiper
and the front wiper high relays.
With the front wiper and the front wiper high relays energized, power is supplied

through front wiper relay

to front wiper high relay

through IPDM E/R terminal 35

to front wiper motor terminal 2.
With power and ground supplied, the front wiper motor operates at high speed.
INTERMITTENT OPERATION
Wiper intermittent operation delay interval is determined from the combination of the intermittent wiper dial
position inputs and vehicle speed. During each intermittent operation delay interval, the BCM sends a front
wiper request signal to the IPDM E/R to operate the wipers.
When the ignition switch is in the ON or START position, and the front wiper switch is turned to an intermittent
position, the BCM detects a front wiper (intermittent) ON request through the combination switch (wiper
switch) reading function.
The BCM then sends a front wiper (intermittent) request signal over CAN communication lines

from BCM terminals 39 and 40

to IPDM E/R terminals 39 and 40.
When the BCM determines that combination switch status is front wiper intermittent ON, it performs the follow-
ing operations.

BCM detects ON/OFF status of intermittent wiper dial position.

BCM calculates operation interval from wiper dial position and vehicle speed signal received through CAN
communications.

BCM sends front wiper request signal (INT) to IPDM E/R at calculated operation interval.
When the IPDM E/R receives a front wiper request signal (INT), it supplies ground to energize the front wiper
relay. It then sends an auto-stop signal to the BCM, and conducts intermittent front wiper motor operation.

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FRONT WIPER AND WASHER SYSTEM
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AUTO STOP OPERATION
When the wiper arms are not located at the base of the windshield, and the wiper switch is turned OFF, the
wiper motor will continue to operate until the wiper arms reach the windshield base. When the wiper arms
reach the base of windshield, front wiper motor terminals 6 and 1 are connected.
Ground is supplied

to IPDM E/R terminal 43

through front wiper motor terminal 6

through front wiper motor terminal 1

through grounds E9, E15, and E24.
The IPDM E/R sends an auto stop operation signal to the BCM through CAN communication lines.
When the BCM receives an auto stop operation signal, the BCM sends wiper stop signal to the IPDM E/R over
CAN communication lines. The IPDM E/R then de-energizes the front wiper relay.
The wiper motor will then stop the wiper arms at the STOP position.
FRONT 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 13

to front and rear washer motor terminal 1, and

through combination switch (wiper switch) terminal 11

to front and rear washer motor terminal 2.
When the front wiper switch is in the front washer position, the BCM detects a front washer signal request
through the combination switch (wiper switch) reading function.
Combination switch ground is supplied

to front and rear washer motor terminal 2

through combination switch (wiper switch) terminal 11

through combination switch (wiper switch) terminal 12

through grounds M57, M61 and M79.
With ground supplied, the front and rear washer motor is operated in the front direction.
When the BCM detects that front washer motor has operated for 0.4 seconds or longer, the BCM uses CAN
communication and sends a wiper request signal to the IPDM E/R for low speed operation of wipers.
When the BCM detects that the washer switch is OFF, low speed operation cycles approximately 3 times and
then stops.
MIST OPERATION
When the wiper switch is temporarily placed in the mist position, wiper low speed operation cycles once and
then stops. For additional information about wiper operation under this condition, refer to WW-5, "
LOW
SPEED WIPER OPERATION" .
If the switch is held in the mist position, low speed operation continues.
FAIL-SAFE FUNCTION
The BCM includes fail-safe function to prevent malfunction of electrical components controlled by CAN com-
munications if a malfunction in CAN communications occurs.
The BCM uses CAN communications to stop output of electrical components it controls.
Until the ignition switch is turned off, the front wiper system remains in same status as just before fail-safe con-
trol was initiated. (If wiper was in low speed operation just before fail-safe, it continues low speed operation
until ignition switch is turned OFF.)
When fail-safe status is initiated, the BCM remains in standby until normal signals are received.
When normal signals are received, fail-safe status is canceled.
COMBINATION SWITCH READING FUNCTION
Refer to WW-6, "COMBINATION SWITCH READING FUNCTION" .
CAN Communication System DescriptionEKS00BDU
Refer to LAN-26, "CAN COMMUNICATION" .

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FRONT WIPER AND WASHER SYSTEM
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Terminals and Reference Values for IPDM E/R EKS00BDY
Work FlowEKS00BDZ
1. Confirm the trouble symptom or customer complaint.
2. Understand the system description, refer to WW-4, "
System Description" .
3. Perform preliminary inspection, refer to WW-12, "
Preliminary Inspection" .
4. Check symptom and repair or replace the cause of malfunction.
5. Does wiper function operate normally? If it operates normally, GO TO 6. If not, GO TO 4.
6. Inspection End.
Preliminary InspectionEKS00BE0
INSPECTION FOR POWER SUPPLY AND GROUND CIRCUIT
Inspection procedure
1. CHECK FUSE
Check if wiper or washer fuse is blown.
35 O/B Combination switch output 2
ON

Light switch and wiper switch OFF

Wiper dial position 4
36 R/W Combination switch output 1
38 W/L Ignition switch (ON) ON— Battery
39 L CAN-H ON——
40 P CAN-L ON——
67 B Ground —— 0
70 W/B Battery power OFF— Battery
Te r m i -
nal No. Wire
color Signal name Measuring condition
Reference Value (V)
(Approx.)
Ignition
switch Operation or condition
SKIA5292E
Terminal
No. Wire
color Signal name Measuring condition
Reference value (V)
(Approx.)
Ignition
switch Operation or condition
32 L Low speed signal ON Wiper switchOFF
0
LO Battery
35 L/B High speed signal ON Wiper switchOFF
0
HI Battery
38 B Ground —— 0
39 L CAN-H ON——
40 P CAN-L ON——
43 L/Y Wiper auto stop signal ON Wiper operating
Battery
Wiper stopped 0
59 B Ground —— 0
UnitPower source Fuse No.
Front and rear washer motor Ignition switch ON or START 9
Front wiper relay Battery39
BCM Ignition switch ON or START
59
Battery f

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All Items, Main Items, Select Item Menu
NOTE:
Perform monitoring of IPDM E/R data with the ignition switch ON. When the ignition switch is at ACC, the dis-
play may not be correct.
ACTIVE TEST
Operation Procedure
1. Touch "WIPER" on the "SELECT TEST ITEM" screen.
2. Touch "ACTIVE TEST" on the "SELECT DIAG MODE" screen.
3. Touch item(s) to be tested and check operation of the selected item(s).
4. During the operation check, touching "BACK" deactivates the operation.
Display Item List
Front Wiper Does Not OperateEKS00BE3
CAUTION:
During IPDM E/R fail-safe control, front wipers may not operate. Refer to PG-18, "
CAN COMMUNICA-
TION LINE CONTROL" to make sure that it is not in fail-safe status.
Inspection Procedure
1. CHECK IPDM E/R TO FRONT WIPERS
With CONSULT-II
1. Select "IPDM E/R" with CONSULT-II, and select "ACTIVE TEST" on "SELECT DIAG MODE" screen.
2. Select "FRONT WIPER" on "SELECT TEST ITEM" screen.
Without CONSULT-II
1. Turn on front wipers using auto active test. Refer to PG-24,
"Auto Active Test" .
2. Confirm front wiper operation.
OK or NG
OK >> GO TO 4.
NG >> GO TO 2.
Item name CONSULT-II
screen display Display or unit Monitor item selection
Description
ALL
SIGNALS MAIN
SIGNALS SELECTION
FROM MENU
Front wiper
request FR WIP REQ STOP/1LO/LO/HI x x x Signal status input from BCM.
Wiper auto stop WIP AUTO STOP ACT P/STOP P x x x Output status of IPDM E/R.
Wiper protection WIP PROT OFF/LS/HS/BLOCK x x x Control status of IPDM E/R.
Te s t i t e m CONSULT-II
screen display Description
Front wiper (HI, LO) output FRONT WIPER With a certain operation (OFF, HI, LO) front wiper relays can be operated.
SKIA3486E

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3. IPDM E/R INSPECTION
With CONSULT-II
1. Turn ignition switch ON.
2. Select "HI" on "ACTIVE TEST" screen.
3. When front wiper relay and front wiper high relay are operating, check voltage between IPDM E/R termi- nals and ground.
Without CONSULT-II
1. Turn on front wipers using the auto active test. Refer to PG-24, "
Auto Active Test" .
2. When front wiper relay, and front wiper high relay are operating, check voltage between IPDM E/R terminals and ground.
OK or NG
OK >> Replace the front wiper motor. Refer to WW-29, "Wiper Motor and Linkage" .
NG >> Replace IPDM E/R. Refer to PG-30, "
Removal and Installation of IPDM E/R" .
4. COMBINATION SWITCH TO BCM INSPECTION
Select "BCM" on CONSULT-II. With "WIPER" data monitor, check
that "FR WIPER INT", "FR WIPER LOW" and "FR WIPER HI" turn
ON-OFF according to operation of wiper switch.
OK or NG
OK >> GO TO 5.
NG >> Check wiper switch. Refer to WW-6, "
COMBINATION
SWITCH READING FUNCTION" .
5. BCM INSPECTION
Select "BCM" on CONSULT-II. Carry out self-diagnosis of BCM.
Displayed self-diagnosis results
NO DTC>> Replace the BCM. Refer to BCS-20, "BCM" .
CAN COMM CIRCUIT>> Check CAN communication line of BCM.
GO TO BCS-13, "
CAN Communication Inspection Using
CONSULT-II (Self-Diagnosis)" .
Terminals
Voltage
(Approx.)
(+)
(– ) Condition
Connector Terminal
E121 32
Ground Stopped
0
LO operation Battery voltage
35 Stopped
0
HI operation Battery voltage
WKIA2101E
WKIA1018E
SKIA1039E

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2. IPDM E/R TO FRONT WIPERS CIRCUIT INSPECTION
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector and front wiper motor connector.
3. Check continuity between IPDM E/R harness connector terminal and front wiper motor harness connector terminal.
OK or NG
OK >> GO TO 3.
NG >> Check for short circuit or open circuit in harness between IPDM E/R and front wiper motor.
3. IPDM E/R INSPECTION
With CONSULT-II
1. Connect IPDM E/R connector and front wiper motor connector.
2. Turn ignition switch ON.
3. Select "LO" on "ACTIVE TEST" screen.
4. When front wiper relay is operating, check voltage between IPDM E/R terminals.
Without CONSULT-II
1. Connect IPDM E/R connector and front wiper motor connector.
2. Turn on front wipers using the auto active test. Refer to PG-24, "
Auto Active Test" .
3. When front wiper relay is operating, check voltage between IPDM E/R terminals.
OK or NG
OK >> Replace the wiper motor. Refer to WW-29, "Wiper Motor
and Linkage" .
NG >> Replace IPDM E/R. Refer to PG-30, "
Removal and Installation of IPDM E/R" .
4. COMBINATION SWITCH TO BCM INSPECTION
Select "BCM" on CONSULT-II. With "WIPER" data monitor, check
that "FR WIPER HI" turns ON-OFF according to operation of wiper
switch.
OK or NG
OK >> Replace BCM. Refer to BCS-20, "BCM" .
NG >> Replace wiper switch. Refer to WW-30, "
Wiper and
Washer Switch" .
Terminals Continuity
Connector Terminal Connector Terminal
E121 32 E233Yes
WKIA2086E
Terminals
Vo l ta g e
(Approx.)
(
– )( +)
Connector Terminal Connector Terminal E122 38
E121 32 Battery
voltage
E124 59
WKIA3198E
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3. IPDM E/R INSPECTION
With CONSULT-II
1. Connect IPDM E/R connector and front wiper motor connector.
2. Turn ignition switch ON.
3. Select "HI" on "ACTIVE TEST" screen.
4. When front wiper high relay is operating, check voltage between IPDM E/R terminals.
Without CONSULT-II
1. Connect IPDM E/R connector and front wiper motor connector.
2. Turn on front wipers using the auto active test. Refer to PG-24, "
Auto Active Test" .
3. When front wiper high relay is operating, check voltage between IPDM E/R terminals.
OK or NG
OK >> Replace the wiper motor. Refer to WW-29, "Wiper Motor
and Linkage" .
NG >> Replace IPDM E/R. Refer to PG-30, "
Removal and Installation of IPDM E/R" .
4. COMBINATION SWITCH TO BCM INSPECTION
Select "BCM" on CONSULT-II. With "WIPER" data monitor, check
that "FR WIPER HI" turns ON-OFF according to operation of wiper
switch.
OK or NG
OK >> Replace BCM. Refer to BCS-20, "BCM" .
NG >> Replace wiper switch. Refer to WW-30, "
Wiper and
Washer Switch" .
ONLY FRONT WIPER INTERMITTENT DOES NOT OPERATE
1. COMBINATION SWITCH TO BCM INSPECTION
Select "BCM" on CONSULT-II. With "WIPER" data monitor, check
that "FR WIPER INT" turns ON-OFF according to operation of wiper
switch.
OK or NG
OK >> Replace BCM. Refer to BCS-20, "BCM" .
NG >> Replace wiper switch. Refer to WW-30, "
Wiper and
Washer Switch" .
Te r m i n a l s
Vo l ta g e
(Approx.)
(
– )(+)
Connector Terminal Connector Terminal E122 38
E121 35Battery
voltage
E124 59
WKIA3200E
WKIA1018E
WKIA1018E

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REAR WIPER AND WASHER SYSTEM
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REAR WIPER AND WASHER SYSTEMPFP:28710
Components Parts and Harness Connector LocationEKS00BEB
System DescriptionEKS00BEC

The wiper switch (combination switch) is composed of a combination of 5 output terminals and 5 input ter-
minals. Terminal combination status is read by the BCM (body control module) when switch is turned ON.

The BCM controls rear wiper ON and INT (intermittent) operation.
Power is supplied at all times

through 50A fusible link (letter f , located in fusible link box)

to BCM terminal 70.
With the ignition switch in ON or START position, power is supplied

through 10A fuse [No. 9, located in fuse block (J/B)]

to combination switch terminal 14, and

through 10A fuse (No. 59, located in the fuse and relay box)

to BCM terminal 38.
Ground is supplied

to BCM terminal 67 and

to combination switch terminal 12

through grounds M57, M61 and M79.
WKIA3462E