Nissan Murano Z50 (2005 year). Manual

VIAS

EC-659

Revision: 2005 August

2005 Murano

CHECK VACUUM EXISTENCE

With CONSULT-II

Stop engine and disconnect vacuum hose connected to power valve actuator.

Start engine and let it idle.

Perform “VIAS SOL VALVE” in “ACTIVE TEST” mode with CONSULT-II.

Turn VIAS control solenoid valve “ON” and “OFF”, and check
vacuum existence under the following conditions.

OK or NG

>> Repair or replace power valve actuator.

NG >> GO

CHECK VACUUM EXISTENCE

Without CONSULT-II

Stop engine and disconnect vacuum hose connected to power valve actuator.

Disconnect VIAS control solenoid valve harness connector.

Start engine and let it idle.

Apply 12V of direct current between VIAS control solenoid valve
terminals 1 and 2.

Check vacuum existence under the following conditions.

OK or NG

>> Repair or replace power valve actuator.

>> GO TO 4.

CHECK VACUUM HOSE

Stop engine.

Check hoses and tubes between intake manifold and power
valve actuator for crack, clogging, improper connection or dis-
connection. Refer to

EC-113, "Vacuum Hose Drawing"

OK or NG

>> GO TO 5.

>> Repair hoses or tubes.

VIAS SOL VALVE

Vacuum

Should exist

OFF

Should not exist

PBIB0844E

Condition

Vacuum

12V direct current supply

Should exist.

No supply

Should not exist.

PBIB0845E

SEF109L

EC-660

VIAS

Revision: 2005 August

2005 Murano

CHECK VACUUM TANK

Refer to

EC-661, "Component Inspection"

OK or NG

>> GO TO 6.

>> Replace vacuum tank.

CHECK VIAS CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT

Turn ignition switch OFF.

Disconnect VIAS control solenoid valve harness connector.

Turn ignition switch ON.

Check voltage between terminal 1 and ground with CONSULT-II
or tester.

OK or NG

>> GO TO 8.

>> GO TO 7.

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors E110, M7

●

Harness connectors M82, F102

●

IPDM E/R connector E7

●

Harness for open or short between VIAS control solenoid valve and IPDM E/R

●

Harness for open or short between VIAS control solenoid valve and ECM

>> Repair harness or connectors.

CHECK VIAS CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

Turn ignition switch OFF.

Disconnect ECM harness connector.

Check harness continuity between ECM terminal 29 and VIAS control solenoid valve terminal 2.
Refer to Wiring Diagram.

Also check harness for short to ground and short to power.

OK or NG

>> GO TO 9.

>> Repair open circuit or short to ground or short to power in harness or connectors.

PBIB1369E

Voltage: Battery voltage

PBIB0173E

Continuity should exist.

VIAS

EC-661

Revision: 2005 August

2005 Murano

CHECK VIAS CONTROL SOLENOID VALVE

Refer to

EC-661, "Component Inspection"

OK or NG

>> GO TO 10.

>> Replace VIAS control solenoid valve.

10.

CHECK INTERMITTENT INCIDENT

Refer to

EC-157, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

>> INSPECTION END

Component Inspection

ABS004SA

VIAS CONTROL SOLENOID VALVE

With CONSULT-II

Reconnect harness connectors disconnected.

Turn ignition switch ON.

Perform “VIAS SOL VALVE” in “ACTIVE TEST” mode.

Check air passage continuity and operation delay time under the
following conditions.

Operation takes less than 1 second.

Without CONSULT-II

Check air passage continuity and operation delay time under the fol-
lowing conditions.

Operation takes less than 1 second.

VACUUM TANK

Disconnect vacuum hose connected to vacuum tank.

Connect a vacuum pump to the port A of vacuum tank.

Apply vacuum and make sure that vacuum exists at the port B.

Condition

VIAS SOL VALVE

Air passage continuity

between A and B

Air passage continuity

between A and C

Yes

OFF

Yes

PBIB2505E

Condition

Air passage continuity

between A and B

Air passage continuity

between A and C

12V direct current supply
between terminals 1 and 2

Yes

No supply

Yes

PBIB2532E

PBIB0846E

INJECTOR CIRCUIT

EC-663

Revision: 2005 August

2005 Murano

INJECTOR CIRCUIT

PFP:16600

Component Description

ABS004OE

The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to the injector circuit, the coil in the injector is
energized. The energized coil pulls the ball valve back and allows
fuel to flow through the injector into the intake manifold. The amount
of fuel injected depends upon the injection pulse duration. Pulse
duration is the length of time the injector remains open. The ECM
controls the injection pulse duration based on engine fuel needs.

CONSULT-II Reference Value in Data Monitor Mode

ABS004OF

Specification data are reference values.

SEF375Z

MONITOR ITEM

CONDITION

SPECIFICATION

B/FUEL SCHDL

●

See

EC-147, "TROUBLE DIAGNOSIS - SPECIFICATION VALUE"

INJ PULSE-B1
INJ PULSE-B2

●

Engine: After warming up

●

Shift lever: P or N

●

Air conditioner switch: OFF

●

No-load

Idle

2.0 - 3.0 msec

2,000 rpm

1.9 - 2.9 msec

INJECTOR CIRCUIT

EC-665

Revision: 2005 August

2005 Murano

Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)

Diagnostic Procedure

ABS004OH

INSPECTION START

Turn ignition switch to START.
Is any cylinder ignited?

Yes or No

Yes (With CONSULT-II)>>GO TO 2.
Yes (Without CONSULT-II)>>GO TO 3.
No

>> GO TO 7.

CHECK OVERALL FUNCTION

With CONSULT-II

Start engine.

Perform “POWER BALANCE” in “ACTIVE TEST” mode with
CONSULT-II.

Make sure that each circuit produces a momentary engine
speed drop.

OK or NG

>> INSPECTION END

>> GO TO 7.

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

21
22
23
40
41
42

L/W
R/Y
R/B
R/G
L/Y
W/L

Injector No. 5
Injector No. 3
Injector No. 1
Injector No. 6
Injector No. 4
Injector No. 2

[Engine is running]

●

Warm-up condition

●

Idle speed

NOTE:
The pulse cycle changes depending on rpm
at idle.

BATTERY VOLTAGE

(11 - 14V)

[Engine is running]

●

Warm-up condition

●

Engine speed is 2,000 rpm.

BATTERY VOLTAGE

(11 - 14V)

SEC984C

SEC985C

PBIB0133E

EC-666

INJECTOR CIRCUIT

Revision: 2005 August

2005 Murano

CHECK FUNCTION OF INJECTOR-I

Without CONSULT-II

Stop engine.

Disconnect harness connector F29, F201.

Turn ignition switch ON.

Check voltage between harness connector F29 terminal 5 and
ground with CONSULT-II or tester.

Turn ignition switch OFF.

Disconnect ECM harness connector.

Check harness continuity between harness connector F29 ter-
minals and ECM terminals as follows.
Refer to Wiring Diagram.

Also check harness for short to ground and short to power.

OK or NG

>> GO TO 5.

>> GO TO 4.

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors M82, F102

●

Fuse block (J/B) connector M1

●

10A fuse

●

Harness for open or short between harness connector F29 and fuse

●

Harness for open or short between harness connector F29 and ECM

>> Repair open circuit or short to ground or short to power in harness or connectors.

PBIB2618E

Voltage: Battery voltage

Cylinder

Harness connector F29

terminal

ECM terminal

Continuity should exist.

PBIB2323E

INJECTOR CIRCUIT

EC-667

Revision: 2005 August

2005 Murano

CHECK FUNCTION OF INJECTOR-II

Provide battery voltage between harness connector F201 as follows
and then interrupt it. Listen to each injector operating sound.

OK or NG

>> GO TO 6.

>> GO TO 7.

CHECK FUNCTION OF INJECTOR-III

Reconnect all harness connector disconnected.

Start engine.

Listen to injectors No. 2, No. 4, No.6 operating sound.

OK or NG

>> INSPECTION END

>> GO TO 7.

Cylinder

Harness connector F201 terminal

(+)

(–)

Operating sound should exist.

PBIB2324E

Clicking noise should exist.

PBIB1986E

EC-668

INJECTOR CIRCUIT

Revision: 2005 August

2005 Murano

CHECK INJECTOR POWER SUPPLY CIRCUIT

Turn ignition switch OFF.

Disconnect injector harness connector.

Turn ignition switch ON.

Check voltage between injector terminal 1 and ground with
CONSULT-II or tester.

OK or NG

>> GO TO 9.

>> GO TO 8.

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors M82, F102

●

Harness connectors F201, F29

●

Fuse block (J/B) connector M1

●

10A fuse

●

Harness for open or short between injector and fuse

>> Repair harness or connectors.

CHECK INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

Turn ignition switch OFF.

Disconnect ECM harness connector.

Check harness continuity between injector terminal 2 and ECM terminals 21, 22, 23, 40, 41, 42.
Refer to Wiring Diagram.

Also check harness for short to ground and short to power.

OK or NG

>> GO TO 11.

>> GO TO 10.

BBIA0237E

Voltage: Battery voltage

PBIB0582E

Continuity should exist.

INJECTOR CIRCUIT

EC-669

Revision: 2005 August

2005 Murano

10.

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors F29, F201

●

Harness for open or short between injector and ECM

>> Repair open circuit or short to ground or short to power in harness or connectors.

11.

CHECK INJECTOR

Refer to

EC-669, "Component Inspection"

OK or NG

>> GO TO 12.

>> Replace injector.

12.

CHECK INTERMITTENT INCIDENT

Refer to

EC-157, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

>> INSPECTION END

Component Inspection

ABS004OI

INJECTOR

Disconnect injector harness connector.

Check resistance between terminals as shown in the figure.

Removal and Installation

ABS004OJ

INJECTOR

Refer to

EM-41, "FUEL INJECTOR AND FUEL TUBE"

Resistance: 11.1 - 14.5

Ω

[at 10 - 60

C (50 - 140

F)]

PBIB1727E

EC-670

FUEL PUMP CIRCUIT

Revision: 2005 August

2005 Murano

FUEL PUMP CIRCUIT

PFP:17042

Description

ABS004OK

SYSTEM DESCRIPTION

*: ECM determines the start signal status by the signals of engine speed and battery voltage.

The ECM activates the fuel pump for 1 second after the ignition switch is turned ON to improve engine start-
ability. If the ECM receives a engine speed signal from the camshaft position sensor (PHASE), it knows that
the engine is rotating, and causes the pump to operate. If the engine speed signal is not received when the
ignition switch is ON, the engine stalls. The ECM stops pump operation and prevents battery discharging,
thereby improving safety. The ECM does not directly drive the fuel pump. It controls the ON/OFF fuel pump
relay, which in turn controls the fuel pump.

COMPONENT DESCRIPTION

A turbine type design fuel pump is used in the furl tank.

CONSULT-II Reference Value in Data Monitor Mode

ABS004OL

Specification data are reference values.

Sensor

Input Signal to ECM

ECM Function

Actuator

Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)

Engine speed*

Fuel pump control

Fuel pump relay

Battery

Battery voltage*

Condition

Fuel pump operation

Ignition switch is turned to ON.

Operates for 1 second.

Engine running and cranking

Operates.

When engine is stopped

Stops in 1.5 seconds.

Except as shown above

Stops.

PBIB1356E

MONITOR ITEM

CONDITION

SPECIFICATION

FUEL PUMP RLY

●

For 1 second after turning ignition switch ON

●

Engine running or cranking

●

Except above conditions

OFF

FUEL PUMP CIRCUIT

EC-671

Revision: 2005 August

2005 Murano

Wiring Diagram

ABS004OM

TBWB0288E

EC-672

FUEL PUMP CIRCUIT

Revision: 2005 August

2005 Murano

Specification data are reference values and are measured between each terminal and ground.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

Diagnostic Procedure

ABS004ON

CHECK OVERALL FUNCTION

Turn ignition switch ON.

Pinch fuel feed hose with two fingers.
Fuel pressure pulsation should be felt on the fuel feed hose
for 1 second after ignition switch is turned ON.

OK or NG

>> INSPECTION END

>> GO TO 2.

CHECK FUEL PUMP POWER SUPPLY CIRCUIT-I

Turn ignition switch OFF.

Disconnect ECM harness connector.

Turn ignition switch ON.

Check voltage between ECM terminal 113 and ground with
CONSULT-II or tester.

OK or NG

>> GO TO 5.

>> GO TO 3.

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

113

B/P

Fuel pump relay

[Ignition switch: ON]

●

For 1 second after turning ignition switch ON

[Engine is running]

0 - 1.5V

[Ignition switch: ON]

●

More than 1 second after turning ignition
switch ON.

BATTERY VOLTAGE
(11 - 14V)

PBIB1378E

Voltage: Battery voltage

PBIB1187E

FUEL PUMP CIRCUIT

EC-673

Revision: 2005 August

2005 Murano

CHECK FUEL PUMP POWER SUPPLY CIRCUIT-I

Turn ignition switch OFF.

Disconnect IPDM E/R harness connector E8.

Turn ignition switch ON.

Check voltage between IPDM E/R terminal 40 and ground with
CONSULT-II or tester.

OK or NG

>> GO TO 4.

>> GO TO 13.

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors E109, M6

●

Harness for open or short between IPDM E/R and ECM

>> Repair open circuit or short to ground or short to power in harness or connectors.

CHECK CONDENSER POWER SUPPLY CIRCUIT-I

Turn ignition switch OFF.

Reconnect all harness connectors disconnected.

Disconnect condenser harness connector.

Turn ignition switch ON.

Check voltage between condenser terminal 1 and ground with
CONSULT-II or tester.

Also check harness for short to ground and short to power.

OK or NG

>> GO TO 9.

>> GO TO 6.

CHECK 15A FUSE

Turn ignition switch OFF.

Disconnect 15A fuse.

Check 15A fuse.

OK or NG

>> GO TO 7.

>> Replace fuse.

Voltage: Battery voltage

PBIB1926E

Voltage:

Battery voltage should exist for 1 second
after ignition switch is turned ON.

PBIB0624E

EC-674

FUEL PUMP CIRCUIT

Revision: 2005 August

2005 Murano

CHECK CONDENSER POWER SUPPLY CIRCUIT-II

Disconnect IPDM E/R harness connector E8.

Check harness continuity between IPDM E/R terminal 39 and condenser terminal 1.
Refer to Wiring Diagram.

Also check harness for short to ground and short to power.

OK or NG

>> GO TO 13.

>> GO TO 8.

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors E106, B5

●

Harness for open or short between IPDM E/R and condenser

>> Repair open circuit or short to ground or short to power in harness or connectors.

CHECK CONDENSER GROUND CIRCUIT

Check harness continuity between condenser terminal 2 and ground.
Refer to Wiring Diagram.

Also check harness for short to power.

OK or NG

>> GO TO 10.

>> Repair open circuit or short to power in harness or connectors.

10.

CHECK CONDENSER

Refer to

EC-675, "Component Inspection"

OK or NG

>> GO TO 11.

>> Replace condenser.

11.

CHECK FUEL PUMP POWER SUPPLY AND GROUND CIRCUIT FOR OPEN AND SHORT

Turn ignition switch OFF.

Disconnect “fuel level sensor unit and fuel pump” harness con-
nector.

Check harness continuity between “fuel level sensor unit and
fuel pump” terminal 1 and harness connector B5 terminal 1, “fuel
level sensor unit and fuel pump” terminal 3 and ground.
Refer to Wiring Diagram.

Also check harness for short to ground and short to power.

OK or NG

>> GO TO 12.

>> Repair open circuit or short to ground or short to power in harness or connectors.

Continuity should exist.

PBIB1357E

Nissan Murano Z50 (2005 year). Manual - part 119