The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.

WARNING:

Always observe the following items for preventing accidental activation.
• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in

the event of a collision that would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.

• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal

injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see “SRS AIR BAG”.

• Never use electrical test equipment on any circuit related to the SRS unless instructed to in this Ser-

vice Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness
connectors.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

WARNING:

Always observe the following items for preventing accidental activation.
• When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the

ignition ON or engine running, never use air or electric power tools or strike near the sensor(s) with
a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing
serious injury.

• When using air or electric power tools or hammers, always switch the ignition OFF, disconnect the

battery, and wait at least 3 minutes before performing any service.

Precaution for Battery Service

INFOID:0000000007236045

Before disconnecting the battery, lower both the driver and passenger windows. This will prevent any interfer-
ence between the window edge and the vehicle when the door is opened/closed. During normal operation, the
window slightly raises and lowers automatically to prevent any window to vehicle interference. The automatic
window function will not work with the battery disconnected.

Revision: 2012 March

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PCS-4

< SYSTEM DESCRIPTION >

[IPDM E/R]

COMPONENT PARTS

SYSTEM DESCRIPTION

COMPONENT PARTS

Component Parts Location

INFOID:0000000006939063

IPDM E/R

Engine room (LH)

JMMIA0863ZZ

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2011 Murano CrossCabriolet

PCS

SYSTEM

PCS-5

< SYSTEM DESCRIPTION >

[IPDM E/R]

SYSTEM

RELAY CONTROL SYSTEM

RELAY CONTROL SYSTEM : System Diagram

INFOID:0000000006939061

RELAY CONTROL SYSTEM : System Description

INFOID:0000000006939062

IPDM E/R activates the internal control circuit to perform the relay ON-OFF control according to the input sig-
nals from various sensors and the request signals received from control units via CAN communication.
NOTE:
To prevent damage to the parts, IPDM E/R integrated relays cannot be removed.

JMMIA0623GB

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PCS-6

< SYSTEM DESCRIPTION >

[IPDM E/R]

SYSTEM

NOTE:
BCM controls the starter relay.

RELAY CONTROL SYSTEM : Fail-safe

INFOID:0000000007161032

CAN COMMUNICATION CONTROL

When CAN communication with ECM and BCM is impossible, IPDM E/R performs fail-safe control. After CAN
communication recovers normally, it also returns to normal control.

If No CAN Communication Is Available With ECM

If No CAN Communication Is Available With BCM

Control relay

Input/output

Transmit unit

Control part

Reference page

• Headlamp low relay
• Headlamp high relay

• Low beam request signal
• High beam request signal

BCM (CAN)

• Headlamp low
• Headlamp high

EXL-9

Front fog lamp relay

Front fog light request sig-
nal

BCM (CAN)

Front fog lamp

EXL-13

Tail lamp relay

Position light request signal

BCM (CAN)

• Parking lamp
• Side marker lamp
• License plate lamp
• Tail lamp

EXL-12

Illuminations

INL-9

• Front wiper relay
• Front wiper high relay

Front wiper request signal

BCM (CAN)

Front wiper motor

WW-7

Front wiper stop position
signal

Front wiper motor

Horn relay

• Theft warning horn re-

quest signal

• Horn reminder signal

BCM (CAN)

• Horn (low)
• Horn (high)

SEC-16

• Starter relay

NOTE

• Starter control relay

Starter control relay signal

BCM (CAN)

Starter motor

•

SEC-9

•

SEC-9

Starter relay control signal

TCM

A/C relay

A/C compressor request
signal

ECM (CAN)

A/C compressor
(magnet clutch)

HAC-14

• Cooling fan relay-1
• Cooling fan relay-2
• Cooling fan relay-3

Cooling fan speed request
signal

ECM (CAN)

• Cooling fan motor-1
• Cooling fan motor-2

EC-40

Ignition relay

Ignition switch ON signal

BCM (CAN)

Ignition relay

PCS-29

Vehicle speed signal

Combination meter
(CAN)

Push-button ignition switch
signal

Push-button ignition
switch

Control part

Fail-safe operation

Cooling fan

• Turns ON the cooling fan relay-2 and the cooling fan relay-3 when ignition switch is turned ON (Cooling

fan operates at HI)

• Turns OFF the cooling fan relay-1, the cooling fan relay-2 and the cooling fan relay-3 when the ignition

switch is turned OFF (Cooling fan does not operate)

A/C compressor

A/C relay OFF

Alternator

Outputs the power generation command signal (PWM signal) 0%

Revision: 2012 March

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PCS

SYSTEM

PCS-7

< SYSTEM DESCRIPTION >

[IPDM E/R]

IGNITION RELAY MALFUNCTION DETECTION FUNCTION

• IPDM E/R monitors the voltage at the contact circuit and excitation coil circuit of the ignition relay inside it.
• IPDM E/R judges the ignition relay error if the voltage differs between the contact circuit and the excitation

coil circuit.

• If the ignition relay cannot turn OFF due to contact seizure, it activates the tail lamp relay for 10 minutes to

alert the user to the ignition relay malfunction when the ignition switch is turned OFF.

FRONT WIPER PROTECTION FUNCTION

IPDM E/R detects front wiper stop position by a front wiper auto stop signal.
When a front wiper stop position signal is in the conditions listed below, IPDM E/R stops power supply to wiper
after repeating a front wiper 10 seconds activation and 20 seconds stop five times.

NOTE:
This operation status can be confirmed on the IPDM E/R “Data Monitor” that displays “BLOCK” for the item
“WIP PROT” while the wiper is stopped.

STARTER MOTOR PROTECTION FUNCTION

IPDM E/R turns OFF the starter control relay to protect the starter motor when the starter control relay remains
active for 90 seconds.

POWER CONTROL SYSTEM

Control part

Fail-safe operation

Headlamp

• Turns ON the headlamp low relay when the ignition switch is turned ON
• Turns OFF the headlamp low relay when the ignition switch is turned OFF
• Headlamp high relay OFF

• Parking lamp
• License plate lamp
• Side maker lamp
• Illumination
• Tail lamp

• Turns ON the tail lamp relay when the ignition switch is turned ON
• Turns OFF the tail lamp relay when the ignition switch is turned OFF

Front wiper motor

• The status just before activation of fail-safe control is maintained until the ignition switch is turned OFF

while the front wiper is operating at LO or HI speed.

• The wiper is operated at LO speed until the ignition switch is turned OFF if the fail-safe control is acti-

vated while the front wiper is set in the INT/AUTO mode and the front wiper motor is operating.

• Returns automatically wiper to stop position when ignition switch is turned ON if fail-safe control is acti-

vated while front wiper motor is operated and wiper stop in the other than stop position.

Front fog lamp

Front fog lamp relay OFF

Horn

Horn relay OFF

Ignition relay

The status just before activation of fail-safe is maintained.

Starter motor

Starter control relay OFF

Voltage judgment

IPDM E/R judgment

Operation

Ignition relay contact side

Ignition relay excitation

coil side

Ignition relay ON normal

—

OFF

Ignition relay OFF normal

—

OFF

Ignition relay ON stuck

• Detects DTC “B2098: IGN RELAY ON”
• Turns ON the tail lamp relay for 10 minutes

OFF

Ignition relay OFF stuck

Detects DTC “B2099: IGN RELAY OFF”

Ignition switch

Front wiper switch

Front wiper stop position signal

OFF

The front wiper stop position signal (stop position) cannot be input for 10 seconds.

The front wiper auto stop signal does not change for 10 seconds.

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PCS-8

< SYSTEM DESCRIPTION >

[IPDM E/R]

SYSTEM

POWER CONTROL SYSTEM : System Diagram

INFOID:0000000006939064

POWER CONTROL SYSTEM : System Description

INFOID:0000000006939065

ALTERNATOR CONTROL

IPDM E/R outputs power generation command signal (PWM signal) to the alternator according to the status of
the power generation command value signal received from ECM via CAN communication. Refer to

CHG-8,

"POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM : System Diagram"

SIGNAL BUFFER SYSTEM

SIGNAL BUFFER SYSTEM : System Diagram

INFOID:0000000006939066

SIGNAL BUFFER SYSTEM : System Description

INFOID:0000000006939067

• IPDM E/R reads the status of the oil pressure switch and transmits the oil pressure switch signal to BCM via

CAN communication. Refer to

MWI-13, "WARNING LAMPS/INDICATOR LAMPS : System Diagram"

• IPDM E/R receives the rear window defogger control signal from BCM via CAN communication and trans-

mits it to ECM and AV control unit via CAN communication. Refer to

DEF-5, "System Diagram"

POWER CONSUMPTION CONTROL SYSTEM

JPMIA0908GB

JPMIA0862GB

Revision: 2012 March

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PCS

SYSTEM

PCS-9

< SYSTEM DESCRIPTION >

[IPDM E/R]

POWER CONSUMPTION CONTROL SYSTEM : System Diagram

INFOID:0000000007235321

POWER CONSUMPTION CONTROL SYSTEM : System Description

INFOID:0000000006939069

OUTLINE

• IPDM E/R incorporates a power consumption control function that reduces the power consumption accord-

ing to the vehicle status.

• IPDM E/R changes its status (control mode) with the sleep wake up signal received from BCM via CAN com-

munication.

Normal mode (wake-up)

- CAN communication is normally performed with other control units.
- Individual unit control by IPDM E/R is normally performed.

Low power consumption mode (sleep)

- Low power consumption control is active.
- CAN transmission is stopped.

SLEEP MODE ACTIVATION

• IPDM E/R judges that the sleep-ready conditions are fulfilled when the ignition switch is OFF and none of the

conditions below are present. Then it transmits a sleep-ready signal (ready) to BCM via CAN communica-
tion.

- Outputting signals to actuators
- Switches or relays operating
- Output requests are being received from control units via CAN communication.
• IPDM E/R stops CAN communication and enters the low power consumption mode when it receives a sleep

wake up signal (sleep) from BCM and the sleep-ready conditions are fulfilled.

WAKE-UP OPERATION

• IPDM E/R changes from the low power consumption mode to the normal mode when it receives a sleep

wake-up signal (wake up) from BCM or any of the following conditions is fulfilled. In addition, it transmits a
sleep-ready signal (not-ready) to BCM via CAN communication to report the CAN communication start.

- Ignition switch ON
- An output request is received from a control unit via CAN communication.

JMMIA0876GB

Revision: 2012 March

2011 Murano CrossCabriolet

PCS-10

< SYSTEM DESCRIPTION >

[IPDM E/R]

DIAGNOSIS SYSTEM (IPDM E/R)

DIAGNOSIS SYSTEM (IPDM E/R)

Diagnosis Description

INFOID:0000000006939071

AUTO ACTIVE TEST

Description

In auto active test mode, the IPDM E/R sends a drive signal to the following systems to check their operation.
• Oil pressure warning lamp
• Front wiper (LO, HI)
• Parking lamp
• License plate lamp
• Side maker lamp
• Tail lamp
• Front fog lamp
• Headlamp (LO, HI)
• A/C compressor (magnet clutch)
• Cooling fan

Operation Procedure

NOTE:
Never perform auto active test in the following conditions.
• CONSULT is connected
• Passenger door is open

Close the hood and lift the wiper arms from the windshield. (Prevent windshield damage due to wiper
operation)
NOTE:
When auto active test is performed with hood opened, sprinkle water on windshield beforehand.

Turn the ignition switch OFF.

Turn the ignition switch ON, and within 20 seconds, press the front door switch (driver side) 10 times.
Then turn the ignition switch OFF.

Turn the ignition switch ON within 10 seconds. After that the horn sounds once and the auto active test
starts.

After a series of the following operations is repeated 3 times, auto active test is completed.

NOTE:
• When auto active test has to be cancelled halfway through test, turn the ignition switch OFF.
• When auto active test is not activated, door switch may be the cause. Check door switch. Refer to

DLK-83,

"Component Function Check"

Inspection in Auto Active Test Mode

When auto active test mode is actuated, the following 6 steps are repeated 3 times.

Operation
sequence

Inspection location

Operation

Oil pressure warning lamp

Blinks continuously during operation of auto active test

Front wiper motor

LO for 5 seconds

→

HI for 5 seconds

• Parking lamp
• License plate lamp
• Side maker lamp
• Tail lamp
• Front fog lamp

10 seconds

Headlamp

⇔

HI 5 times

A/C compressor (magnet clutch)

⇔

OFF 5 times

Cooling fan

LO for 5 seconds

→

MID for 3 seconds

→

HI for 2 seconds

Revision: 2012 March

2011 Murano CrossCabriolet

PCS

DIAGNOSIS SYSTEM (IPDM E/R)

PCS-11

< SYSTEM DESCRIPTION >

[IPDM E/R]

Concept of auto active test

• IPDM E/R starts the auto active test with the door switch signals transmitted by BCM via CAN communica-

tion. Therefore, the CAN communication line between IPDM E/R and BCM is considered normal if the auto
active test starts successfully.

• The auto active test facilitates troubleshooting if any systems controlled by IPDM E/R cannot be operated.

Diagnosis chart in auto active test mode

JMMIA0836GB

Symptom

Inspection contents

Possible cause

Any of the following components do not operate

• Parking lamp
• License plate lamp
• Side maker lamp
• Tail lamp
• Front fog lamp
• Headlamp (HI, LO)
• Front motor wiper

Perform auto active test.
Does the applicable system
operate?

YES

BCM signal input circuit

• Lamp or motor
• Lamp or motor ground circuit
• Harness or connector between

IPDM E/R and applicable system

• IPDM E/R

A/C compressor does not operate

Perform auto active test.
Does the magnet clutch oper-
ate?

YES

• A/C amp. signal input circuit
• CAN communication signal between

A/C amp. and ECM

• CAN communication signal between

ECM and IPDM E/R

• Magnet clutch
• Harness or connector between

IPDM E/R and magnet clutch

• IPDM E/R

Oil pressure warning lamp does not operate

Perform auto active test.
Does the oil pressure warning
lamp blink?

YES

• Harness or connector between

IPDM E/R and oil pressure switch

• Oil pressure switch
• IPDM E/R

• CAN communication signal between

IPDM E/R and BCM

• CAN communication signal between

BCM and combination meter

• Combination meter

Revision: 2012 March

2011 Murano CrossCabriolet

PCS-12

< SYSTEM DESCRIPTION >

[IPDM E/R]

DIAGNOSIS SYSTEM (IPDM E/R)

CONSULT Function (IPDM E/R)

INFOID:0000000006939072

APPLICATION ITEM

CONSULT performs the following functions via CAN communication with IPDM E/R.

SELF DIAGNOSTIC RESULT

Refer to

PCS-23, "DTC Index"

DATA MONITOR

Monitor item

Cooling fan does not operate

Perform auto active test.
Does the cooling fan operate?

YES

• ECM signal input circuit
• CAN communication signal between

ECM and IPDM E/R

• Harness or connector between

IPDM E/R and cooling fan motor

• Harness or connector between

IPDM E/R and cooling fan relay

• Cooling fan motor
• Cooling fan relay
• IPDM E/R

Symptom

Inspection contents

Possible cause

Diagnosis mode

Description

Ecu Identification

Allows confirmation of IPDM E/R part number.

Self Diagnostic Result

Displays the diagnosis results judged by IPDM E/R.

Data Monitor

Displays the real-time input/output data from IPDM E/R input/output data.

Active Test

IPDM E/R can provide a drive signal to electronic components to check their operations.

CAN Diag Support Monitor

The results of transmit/receive diagnosis of CAN communication can be read.

Monitor Item

[Unit]

MAIN SIG-

NALS

Description

MOTOR FAN REQ
[1/2/3/4]

Displays the value of the cooling fan speed request signal received from ECM via
CAN communication.

AC COMP REQ
[Off/On]

Displays the status of the A/C compressor request signal received from ECM via
CAN communication.

TAIL&CLR REQ
[Off/On]

Displays the status of the position light request signal received from BCM via CAN
communication.

HL LO REQ
[Off/On]

Displays the status of the low beam request signal received from BCM via CAN
communication.

HL HI REQ
[Off/On]

Displays the status of the high beam request signal received from BCM via CAN
communication.

FR FOG REQ
[Off/On]

Displays the status of the front fog light request signal received from BCM via
CAN communication.

FR WIP REQ
[Stop/1LOW/Low/Hi]

Displays the status of the front wiper request signal received from BCM via CAN
communication.

WIP AUTO STOP
[STOP P/ACT P]

Displays the status of the front wiper auto stop signal judged by IPDM E/R.

WIP PROT
[Off/BLOCK]

Displays the status of the front wiper fail-safe operation judged by IPDM E/R.

IGN RLY1 -REQ
[Off/On]

Displays the status of the ignition switch ON signal received from BCM via CAN
communication.

IGN RLY
[Off/On]

Displays the status of the ignition relay judged by IPDM E/R.

PUSH SW
[Off/On]

Displays the status of the push-button ignition switch judged by IPDM E/R.

Revision: 2012 March

2011 Murano CrossCabriolet

PCS

DIAGNOSIS SYSTEM (IPDM E/R)

PCS-13

< SYSTEM DESCRIPTION >

[IPDM E/R]

ACTIVE TEST

Test item

INTER/NP SW
[Off/On]

Displays the status of the shift position judged by IPDM E/R.

ST RLY CONT
[Off/On]

Displays the status of the starter relay status signal received from BCM via CAN
communication.

IHBT RLY -REQ
[Off/On]

Displays the status of the starter control relay signal received from BCM via CAN
communication.

ST/INHI RLY
[Off/ ST ON/INHI ON/UNKWN]

Displays the status of the starter relay and starter control relay judged by IPDM
E/R.

DETENT SW
[Off/On]

Displays the status of the CVT shift selector (detention switch) judged by IPDM E/
R.

S/L RLY -REQ
[Off/On]