Nissan Murano Z50 (2004 year). Manual - part 189

POWER SUPPLY ROUTING CIRCUIT

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TKWA1743E

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TKWA1744E

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ACCESSORY POWER SUPPLY - IGNITION SW. IN “ACC” OR “ON”

TKWA1747E

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POWER SUPPLY ROUTING CIRCUIT

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IGNITION POWER SUPPLY - IGNITION SW. IN “ON” AND/OR “START”

TKWA1748E

POWER SUPPLY ROUTING CIRCUIT

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Fuse 

AKS007HG

●

If fuse is blown, be sure to eliminate cause of incident before
installing new fuse.

●

Use fuse of specified rating. Never use fuse of more than speci-
fied rating.

●

Do not partially install fuse; always insert it into fuse holder prop-
erly.

●

Remove fuse for “ELECTRICAL PARTS (BAT)” if vehicle is not
used for a long period of time.

Fusible Link

AKS007HH

A melted fusible link can be detected either by visual inspection or by
feeling with finger tip. If its condition is questionable, use circuit
tester or test lamp.

CAUTION:

●

If fusible link should melt, it is possible that critical circuit
(power supply or large current carrying circuit) is shorted.
In such a case, carefully check and eliminate cause of inci-
dent.

●

Never wrap outside of fusible link with vinyl tape. Important:
Never let fusible link touch any other wiring harness, vinyl
or rubber parts.

Circuit Breaker 

AKS007HI

The PTC thermistor generates heat in response to current flow. The
temperature (and resistance) of the thermistor element varies with
current flow. Excessive current flow will cause the element's temper-
ature to rise. When the temperature reaches a specified level, the
electrical resistance will rise sharply to control the circuit current.
Reduced current flow will cause the element to cool. Resistance falls
accordingly and normal circuit current flow is allowed to resume.

CEL083

CKIA0274E

SEL109W

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

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IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

PFP:284B7

System Description

AKS00A49

●

IPDM E/R (Intelligent Power Distribution Module Engine Room) integrates the relay box and fuse block
which were originally placed in engine room. It controls integrated relay via IPDM E/R control circuit.

●

IPDM E/R-integrated control circuit performs ON-OFF operation of relay, CAN communication control, oil
pressure switch signal, hood switch signal reception, etc.

●

It controls operation of each electrical part via ECM, BCM and CAN communication lines.

CAUTION:

None of the IPDM E/R-integrated relays can be removed.

SYSTEMS CONTROLLED BY IPDM E/R

1.

Lamp control
Using CAN communication line, it receives signal from BCM and controls the following lamps:

●

Headlamps (Hi, Lo)

●

Parking lamps

●

Tail lamps

●

Front fog lamps

2.

Wiper control
Using CAN communication line, it receives signals from BCM and controls the front wipers.

3.

Rear window defogger relay control
Using CAN communication line, it receives signals from BCM and controls the rear window defogger
relay.

4.

A/C compressor control
Using CAN communication line, it receives signals from ECM and controls the A/C relay.

5.

Cooling fan control
Using CAN communication line, it receives signals from ECM and controls cooling fan relay.

6.

Horn control
Using CAN communication line, it receives signals from BCM and controls horn relay.

CAN COMMUNICATION LINE CONTROL

With CAN communication, by connecting each control unit using two communication lines (CAN L line, CAN H
line), it is possible to transmit maximum amount of information with minimum wiring. Each control unit can
transmit and receive data, and reads necessary information only.

1.

Fail-safe control

●

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

●

Operation of control parts by IPDM E/R during fail-safe mode is as follows:

Controlled system

Fail-safe mode

Headlamp

●

With the ignition switch ON, the headlamp (low) is ON. 

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With the ignition switch OFF, the headlamp (low) is OFF. 

Tail and parking lamps

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With the ignition switch ON, the tail and parking lamps is ON. 

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With the ignition switch OFF, the tail and parking lamps is OFF. 

Cooling fan

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With the ignition switch ON, the cooling fan HI operates.

●

With the ignition switch OFF, the cooling fan stops.

Front wiper

Until the ignition switch is turned off, the front wiper LO and HI remains in the same status it 
was in just before fail

−

safe control was initiated.

Rear window defogger

Rear window defogger relay OFF

A/C compressor

A/C compressor OFF

Front fog lamps 

Front fog lamp relay OFF

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IPDM E/R STATUS CONTROL

In order to save power, IPDM E/R switches status by itself based on each operating condition.

1.

CAN communication status

●

CAN communication is normally performed with other control units.

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Individual unit control by IPDM E/R is normally performed.

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When sleep request signal is received from BCM, mode is switched to sleep waiting status.

2.

Sleep waiting status

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Process to stop CAN communication is activated.

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All systems controlled by IPDM E/R are stopped. When 1 seconds have elapsed after CAN communi-
cation with other control units is stopped, mode switches to sleep status.

3.

Sleep status

●

IPDM E/R operates in low current-consumption mode.

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CAN communication is stopped.

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When a change in CAN communication line is detected, mode switches to CAN communication status.

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When a change hood switch or ignition switch signal is detected, mode switches to CAN communica-
tion status.

CAN Communication System Description

AKS00A4A

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Modern
vehicles are equipped with many electronic control units and each control unit shares information and links
with other control units during operation (not independent). In CAN communication, control units are con-
nected with 2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmission
with less wiring. Each control unit transmits/receives data but selectively reads required data only.

CAN Communication Unit

AKS00AOH

Refer to 

LAN-8, "CAN Communication Unit"

 .

Function of Detecting Ignition Relay Malfunction

AKS00A4C

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When contact point of integrated ignition relay is stuck and cannot be turned OFF, IPDM E/R turns ON tail
and parking lamps for 10 minutes to indicate IPDM E/R malfunction.

●

When a state of ignition relay having built-in does not agree with a state of Ignition switch signal input by a
CAN communication from BCM, IPDM E/R lets tail lamp relay operate.

NOTE:
When the ignition switch is turned ON, the tail lamp is OFF.

Ignition switch signal

Ignition relay status

Tail lamp relay

ON

ON

—

OFF

OFF

—

ON

OFF

—

OFF

ON

ON (10 minutes)

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

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CONSULT-II

AKS00A4D

CONSULT-II performs the following functions with combination of data receiving, command and transmission
using the CAN communication line from the IPDM E/R.

CONSULT-II INSPECTION PROCEDURE

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 carry 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.

2.

Touch “START (NISSAN BASED VHCL)”.

3.

Touch “IPDM E/R” on “SELECT SYSTEM” screen.

●

If “IPDM E/R” is not displayed, print “SELECT SYSTEM”
screen, then refer to 

GI-39, "CONSULT-II Data Link Connec-

tor (DLC) Circuit"

 .

Inspection Item, Diagnosis Mode

Description

SELF-DIAG RESULTS

The IPDM E/R performs diagnosis of the CAN communication and self-diagnosis.

DATA MONITOR

The input/output data of the IPDM E/R is displayed in real time.

CAN DIAG SUPPORT MNTR

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

ACTIVE TEST

The IPDM E/R sends a drive signal to electronic components to check their operation.

PBIB1300E

SKIA3098E

SKIA6338E

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4.

Select the desired part to be diagnosed on the “SELECT DIAG
MODE” screen.

SELF-DIAG RESULTS
Operation Procedure

1.

Touch “SELF-DIAG RESULTS” on “SELECT DIAG MODE” screen.

2.

Check display content in self-diagnostic results.

Display Item List

NOTE:
The details for display of the period are as follows:

●

CRNT: Error currently detected with IPDM E/R.

●

PAST: Error detected in the past and memorized with IPDM E/R.

PKIA6016E

Display Items

CONSULT-II 
display code

Malfunction detecting condition

TIME

Possible causes

CRNT

PAST

NO DTC IS 
DETECTED.FURTHER 
TESTING MAY BE 
REQUIRED.

-

-

-

-

-

CAN COMM CIRC

U1000

●

If CAN communication reception/transmis-
sion data has a malfunction, or if any of the 
control units malfunction, data reception/
transmission cannot be confirmed.

●

When the data in CAN communication is not 
received before the specified time

×

×

Any of or several items 
below have errors.

●

TRANSMIT DIAG

●

ECM

●

BCM/SEC