wipers INFINITI QX56 2004 Factory User Guide

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FRONT WIPER AND WASHER SYSTEM
Revision: August 20072004 QX56

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.
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 -S AFE F UN CTI ON
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.

FRONT WIPER AND WASHER SYSTEM
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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
Trouble DiagnosisEKS007FG
FRONT WIPER DOES NOT OPERATE
CAUTION:
During IPDM E/R fail-safe control, front wipers may not operate. Refer to PG-17, "
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-23,
"Auto Active Test" .
2. Confirm front wiper operation.
OK or NG
OK >> GO TO 4.
NG >> GO TO 2.
Te s t i t e mCONSULT-II
screen displayDescription
Front wiper (HI, LO) output FRONT WIPER With a certain operation (OFF, HI, LO) front wiper relays can be operated.
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FRONT WIPER AND WASHER SYSTEM
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2. IPDM E/R TO FRONT WIPERS CIRCUIT INSPECTION
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connectors and front wiper motor connector.
3. Check continuity between IPDM E/R harness connector termi-
nals and front wiper motor harness connector terminals.
4. Check continuity between IPDM E/R harness connector termi-
nals and ground.
5. Check continuity between IPDM E/R harness connector termi-
nals and ground.
6. Check continuity between front wiper motor harness connector
terminal 1 and ground.
OK or NG
OK >> Connect connectors. GO TO 3.
NG >> Check for open circuit in harness between front wiper
motor and ground.
IPDM E/R Front wiper motor
Continuity
ConnectorTe r m i n a l
(wire color)ConnectorTe r m i n a l
(wire color)
E12132 (L)
E233 (L)
Ye s 35 (L/B) 2 (L/B)
E122 43 (L/Y) 6 (L/Y)
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IPDM E/R
Continuity
Connector Terminal (wire color)
E12132 (L)
Ground No 35 (L/B)
E122 43 (L/Y)
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IPDM E/R
Continuity
ConnectorTe r m i n a l
(wire color)
E122 38 (B)
Ground Yes
E124 59 (B)
WKIA2100E
Front wiper motor
Continuity
ConnectorTe r m i n a l
(wire color)
E23 1 (B) Ground Yes
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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-23, "
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, "Removal and Installation of Wiper Motor and
Linkage" .
NG >> Replace IPDM E/R. Refer to PG-29, "
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 BCS-3, "
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-19, "Removal and
Installation of BCM" .
CAN COMM CIRCUIT>> Check CAN communication line of BCM.
GO TO BCS-13, "
CAN Communication Inspection Using
CONSULT-II (Self-Diagnosis)" .
IPDM E/R
(–) ConditionVo l ta g e
(Approx.) (+)
Connector Terminal (wire color)
E12132 (L)
GroundStopped 0V
LO operation Battery voltage
35 (L/B)Stopped 0V
HI operation Battery voltage
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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 "LO" on "ACTIVE TEST" screen.
4. When front wipers are operating and when stopped, measure voltage between IPDM E/R terminal 43 and
ground.
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-23, "
Auto Active Test" .
3. When front wipers are operating and when stopped, measure
voltage between IPDM E/R terminal 43 and ground.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-29, "Removal and Installation of IPDM E/R" .
NG >> Replace front wiper motor. Refer to WW-29, "
Removal and Installation of Wiper Motor and Link-
age" .
ONLY FRONT WIPER LOW DOES NOT OPERATE
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.
3. Select "LO" on "ACTIVE TEST" screen.
4. Confirm front wiper low operation.
Without CONSULT-II
1. Turn on front wipers using auto active test. Refer to PG-23,
"Auto Active Test" .
2. Confirm front wiper low operation.
OK or NG
OK >> GO TO 4.
NG >> GO TO 2.
IPDM E/R
(–) ConditionVo l ta g e
(Approx.) (+)
ConnectorTe r m i n a l
(wire color)
E122 43 (L/Y) GroundWiper operating Fluctuating
Wiper stopped 0V
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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-23, "
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, "Removal and Installation of Wiper Motor and Linkage"
.
NG >> Replace IPDM E/R. Refer to PG-29, "
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-19, "Removal and Installa-
tion of BCM" .
NG >> Replace wiper switch. Refer to WW-31, "
Removal and
Installation of Wiper and Washer Switch" .
IPDM E/R Front wiper motor
Continuity
ConnectorTe r m i n a l
(wire color)ConnectorTe r m i n a l
(wire color)
E121 32 (L) E23 3 (L) Yes
WKIA2086E
IPDM E/R
Vo ltag e
(Approx.) (–) (+)
ConnectorTe r m i n a l
(wire color)ConnectorTe r m i n a l
(wire color)
E122 38 (B)
E121 32 (L) Battery voltage
E124 59 (B)
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ONLY FRONT WIPER HI DOES NOT OPERATE
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.
3. Select "HI" on "ACTIVE TEST" screen.
4. Confirm front wiper high operation.
Without CONSULT-II
1. Turn on front wipers using auto active test. Refer to PG-23,
"Auto Active Test" .
2. Confirm front wiper operation.
OK or NG
OK >> GO TO 4.
NG >> GO TO 2.
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.
SKIA3486E
IPDM E/R Front wiper motor
Continuity
ConnectorTe r m i n a l
(wire color)ConnectorTe r m i n a l
(wire color)
E121 35 (L/B) E23 2 (L/B) Yes
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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-23, "
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, "Removal and Installation of Wiper Motor and Linkage"
.
NG >> Replace IPDM E/R. Refer to PG-29, "
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-19, "Removal and Installa-
tion of BCM" .
NG >> Replace wiper switch. Refer to WW-31, "
Removal and
Installation of Wiper and Washer Switch" .
ONLY FRONT WIPER INT DOES NOT OPERATE
Inspection Procedure
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-19, "Removal and Installa-
tion of BCM" .
NG >> Replace wiper switch. Refer to WW-31, "
Removal and
Installation of Wiper and Washer Switch" .
IPDM E/R
Voltage
(Approx.) (–) (+)
ConnectorTerminal (wire
color)ConnectorTerminal (wire
color)
E122 38 (B)
E121 35 (L/B) Battery voltage
E124 59 (B)
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WKIA1018E
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FRONT WIPER INTERMITTENT OPERATION SWITCH POSITION CANNOT BE ADJUSTED
Inspection Procedure
1. COMBINATION SWITCH TO BCM INSPECTION
Select "BCM" on CONSULT-II. With “WIPER” data monitor, check
that “INT VOLUME” changes in order from 1 to 7 according to opera-
tion of the intermittent switch dial position.
OK or NG
OK >> Replace BCM. Refer to BCS-19, "Removal and Installa-
tion of BCM" .
NG >> Replace wiper switch. Refer to WW-31, "
Removal and
Installation of Wiper and Washer Switch" .
WIPERS DO NOT WIPE WHEN FRONT WASHER OPERATES
Inspection Procedure
1. COMBINATION SWITCH TO BCM INSPECTION
Select "BCM" on CONSULT-II. With “WIPER” data monitor, check
that “FR WASHER SW” turns ON-OFF according to operation of
front washer switch.
OK or NG
OK >> Replace BCM. Refer to BCS-19, "Removal and Installa-
tion of BCM" .
NG >> Replace wiper switch. Refer to WW-31, "
Removal and
Installation of Wiper and Washer Switch" .
FRONT WIPERS OPERATE FOR 10 SECONDS, STOP FOR 20 SECONDS, AND AFTER
REPEATING THIS OPERATION FIVE TIMES, THEY BECOME INOPERATIVE
CAUTION:

When auto stop signal has not varied for 10 seconds or longer while IPDM E/R is operating front
wipers, IPDM E/R considers front wipers locked and stops wiper output, which causes this symp-
tom.

This status can be checked by using IPDM E/R "DATA MONITOR". Under this condition, "WIP
PROT" reads "BLOCK".
Inspection Procedure
1. CHECK IPDM E/R TO FRONT WIPER MOTOR
With CONSULT-II
Select "IPDM E/R" with CONSULT-II. With “WIPER” data monitor,
confirm that "WIP AUTO STOP" changes from "ACT P" to "STOP P"
according to wiper operation.
Without CONSULT-II
GO TO 2.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-29, "Removal and
Installation of IPDM E/R" .
NG >> GO TO 2.
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