Nissan Pathfinder (2006 year). Instruction — part 401
FRONT WIPER AND WASHER SYSTEM
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2006 Pathfinder
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
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from BCM terminals 39 and 40
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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
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through front wiper relay
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to front wiper high relay
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through IPDM E/R terminal 32
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to front wiper motor terminal 1.
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
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from BCM terminals 39 and 40
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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
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through front wiper relay
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to front wiper high relay
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through IPDM E/R terminal 35
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to front wiper motor terminal 4.
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
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from BCM terminals 39 and 40
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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.
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BCM detects ON/OFF status of intermittent wiper dial position.
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BCM calculates operation interval from wiper dial position and vehicle speed signal received through CAN
communications.
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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 5 and 2 are connected.
Ground is supplied
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FRONT WIPER AND WASHER SYSTEM
2006 Pathfinder
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to IPDM E/R terminal 43
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through front wiper motor terminal 5
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through front wiper motor terminal 2
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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
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through 10A fuse [No. 15, located in the fuse block (J/B)]
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through combination switch (wiper switch) terminal 2
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through combination switch (wiper switch) terminal 4
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to front and rear washer motor terminal 1.
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
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to front and rear washer motor terminal 2
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through combination switch (wiper switch) terminal 3
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through combination switch (wiper switch) terminal 9
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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
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
control 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
BCS-3, "COMBINATION SWITCH READING FUNCTION"
CAN Communication System Description
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FRONT WIPER AND WASHER SYSTEM
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2006 Pathfinder
Schematic
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WKWA2985E
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FRONT WIPER AND WASHER SYSTEM
2006 Pathfinder
Wiring Diagram — WIPER —
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WKWA2986E
FRONT WIPER AND WASHER SYSTEM
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2006 Pathfinder
WKWA2987E
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FRONT WIPER AND WASHER SYSTEM
2006 Pathfinder
WKWA1966E
FRONT WIPER AND WASHER SYSTEM
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Terminals and Reference Values for BCM
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Refer to
BCS-12, "Terminals and Reference Values for BCM"
Terminals and Reference Values for IPDM E/R
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Refer to
PG-28, "Terminals and Reference Values for IPDM E/R"
.
Work Flow
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1.
Confirm the symptom or customer complaint.
2.
Understand the system description, refer to
.
3.
Perform preliminary inspection, refer to
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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 Inspection
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Refer to
BCS-16, "BCM Power Supply and Ground Circuit Check"
CONSULT-II Function (BCM)
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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.
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.
BBIA0538E
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FRONT WIPER AND WASHER SYSTEM
2006 Pathfinder
2.
Touch "START (NISSAN BASED VHCL)".
3.
Touch "BCM" on the "SELECT SYSTEM" screen.
If "BCM" is not indicated, go to
4.
Select the desired part to be diagnosed on the "SELECT TEST
ITEM" screen.
WORK SUPPORT
Operation Procedure
1.
Touch "WIPER" on the "SELECT TEST ITEM" screen.
2.
Touch "WORK SUPPORT" on the "SELECT DIAG MODE" screen.
3.
Touch "WIPER SPEED SETTING" on the "SELECT WORK ITEM" screen.
4.
Touch "START".
5.
Touch "CHANGE SETT".
6.
The setting will be changed and "CURRENT SETTING" will be displayed.
7.
Touch "END".
Work Support Setting Item
NOTE:
Factory setting
BCIA0029E
BCIA0030E
LKIA0183E
Item
Description
CONSULT-II
WIPER SPEED SETTING
When wiper switch is at INTERMITTENT, front wiper intermittent
time can be selected according to vehicle speed.
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ON (Operated)/OFF
NOTE
(Not operated)
ON/OFF
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