Nissan Murano Z51 (2008 year). Manual — part 373
STC-8
< COMPONENT DIAGNOSIS >
POWER STEERING SOLENOID VALVE
YES
>> INSPECTION END
NO
>> Repair or replace damaged parts.
Component Inspection
INFOID:0000000003305952
1.
CHECK POWER STEERING SOLENOID VALVE
1.
Turn the ignition switch OFF.
2.
Disconnect power steering solenoid valve harness connector.
3.
Check resistance between power steering solenoid valve connector terminals.
4.
Check power steering solenoid valve by listening for its operation sound while applying battery voltage to
power steering solenoid valve connector E52 terminals 1 (positive) and 2 (negative).
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace gear-sub assembly. Refer to
Power steering solenoid valve
Resistance (Approx.)
Connector
Terminal
E52
1 2
4
–
6
Ω
Revision: 2008 October
2009 Murano
ENGINE SPEED SIGNAL CIRCUIT
STC-9
< COMPONENT DIAGNOSIS >
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ENGINE SPEED SIGNAL CIRCUIT
Description
INFOID:0000000003305953
ECM sends engine speed signal to power steering control unit.
Diagnosis Procedure
INFOID:0000000003305954
1.
PERFORM ECM SELF-DIAGNOSIS
With CONSULT-III
1.
Turn the ignition switch ON.
Perform ECM self-diagnosis. Refer to
EC-115, "CONSULT-III Function"
.
Is any DTC detected?
YES
>> Check the DTC.
NO
>> GO TO 2.
2.
CHECK HARNESS BETWEEN ECM AND POWER STEERING CONTROL UNIT
1.
Turn the ignition switch OFF.
2.
Disconnect ECM harness connectors.
3.
Disconnect power steering control unit harness connector.
4.
Check continuity between ECM harness connector and power steering control unit harness connector.
5.
Check continuity between power steering control unit harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace damaged parts.
3.
CHECK ENGINE SPEED SIGNAL (1)
1.
Turn the ignition switch OFF.
2.
Connect ECM harness connectors.
3.
Check signal between ECM harness connector and ground with oscilloscope.
ECM
Power steering control unit
Continuity
Connector
Terminal
Connector
Terminal
E16
94
M61
10
Existed
Power steering control unit
—
Continuity
Connector
Terminal
M61
10
Ground
Not existed
Revision: 2008 October
2009 Murano
STC-10
< COMPONENT DIAGNOSIS >
ENGINE SPEED SIGNAL CIRCUIT
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace ECM. Refer to
EC-15, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT :
.
4.
CHECK ENGINE SPEED SIGNAL (2)
1.
Turn the ignition switch OFF.
2.
Connect power steering control unit harness connector.
3.
Check signal between power steering control unit harness connector and ground with oscilloscope.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace power steering control unit. Refer to
5.
CHECK TERMINALS AND HARNESS CONNECTORS
• Check power steering control unit pin terminals for damage or loose connection with harness connector.
• Check ECM pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair or replace damaged parts.
ECM
Ground
Condition
Voltage (Approx.)
Connector
Terminal
E16
94
Ground
Engine is running
• Warm-up condition
• Idle speed
Engine is running
• Warm-up condition
• Engine speed: Approx. 2,000 rpm
JMBIA0076GB
JMBIA0077GB
Power steering control unit
—
Condition
Voltage (Approx.)
Connector
Terminal
M61
10
Ground
Engine is running
• Warm-up condition
• Idle speed
Engine is running
• Warm-up condition
• Engine speed: Approx. 2,000 rpm
JMBIA0076GB
JMBIA0077GB
Revision: 2008 October
2009 Murano
VEHICLE SPEED SIGNAL CIRCUIT
STC-11
< COMPONENT DIAGNOSIS >
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VEHICLE SPEED SIGNAL CIRCUIT
Description
INFOID:0000000003305955
Combination meter sends vehicle speed signal to power steering control unit.
Diagnosis Procedure
INFOID:0000000003305956
1.
PERFORM COMBINATION METER SELF-DIAGNOSIS
With CONSULT-III
1.
Turn the ignition switch ON.
2.
Perform combination meter self-diagnosis. Refer to
MWI-34, "CONSULT-III Function (METER/M&A)"
Is any DTC detected?
YES
>> Check the DTC.
NO
>> GO TO 2.
2.
CHECK HARNESS BETWEEN COMBINATION METER AND POWER STEERING CONTROL UNIT
1.
Turn the ignition switch OFF.
2.
Disconnect combination meter harness connector.
3.
Disconnect power steering control unit harness connector.
4.
Check continuity between combination meter harness connector and power steering control unit harness
connector.
5.
Check continuity between power steering control unit harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace damaged parts.
3.
CHECK VEHICLE SPEED SIGNAL (1)
1.
Turn the ignition switch OFF.
2.
Connect combination meter harness connector.
3.
Check combination meter input/output standard values. Refer to
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace combination meter Refer to
.
4.
CHECK VEHICLE SPEED SIGNAL (2)
1.
Turn the ignition switch OFF.
2.
Connect power steering control unit harness connector.
3.
Check signal between power steering control unit harness connector and ground with oscilloscope.
Combination meter
Power steering control unit
Continuity
Connector
Terminal
Connector
Terminal
M34
30
M61
8
Existed
Power steering control unit
—
Continuity
Connector
Terminal
M61
8
Ground
Not existed
Revision: 2008 October
2009 Murano
STC-12
< COMPONENT DIAGNOSIS >
VEHICLE SPEED SIGNAL CIRCUIT
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace power steering control unit. Refer to
5.
CHECK TERMINALS AND HARNESS CONNECTORS
• Check power steering control unit pin terminals for damage or loose connection with harness connector.
• Check combination meter pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair or replace damaged parts.
Power steering control unit
—
Condition
Voltage (Approx.)
Connector
Terminal
M61
8
Ground
Vehicle speed: 40 km/h (25 MPH)
CAUTION:
Check air pressure of tire under
standard condition.
JSNIA0015GB
Revision: 2008 October
2009 Murano
POWER STEERING CONTROL UNIT
STC-13
< ECU DIAGNOSIS >
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ECU DIAGNOSIS
POWER STEERING CONTROL UNIT
Reference Value
INFOID:0000000003305957
TERMINAL LAYOUT
PHYSICAL VALUES
JSGIA0023ZZ
Terminal No.
(Wire color)
Description
Condition
Value (Approx.)
+
-
Signal name
Input/
Output
1
(Y)
Ground
Power steering solenoid
valve voltage
Output
Vehicle speed: 0 km/h (0 MPH)
(Engine is running)
4.4 – 6.6 V
Vehicle speed: 100 km/h (62 MPH)
2.4 – 3.6 V
3
(G)
Ground
Ignition switch power
supply
Input
Ignition switch: ON
Battery voltage
Ignition switch: OFF
0 V
5
(LG)
Ground
Power steering solenoid
valve ground
—
Always
0 V
6
(B)
Ground
Ground
—
Always
0 V
8
(P)
Ground
Vehicle speed signal
Input
Vehicle speed: 40 km/h (25 MPH)
CAUTION:
Check air pressure of tire under
standard condition.
10
(V)
Ground
Engine speed signal
Input
Engine is running
• Warm-up condition
• Idle speed
Engine is running
• Warm-up condition
• Engine speed: Approx. 2,000 rpm
JSNIA0015GB
JMBIA0076GB
JMBIA0077GB
Revision: 2008 October
2009 Murano
STC-14
< ECU DIAGNOSIS >
POWER STEERING CONTROL UNIT
CAUTION:
When using circuit tester or oscilloscope to measure voltage for inspection, be sure not to forcibly extend any connector ter-
minals.
Wiring Diagram - ELECTRONICALLY CONTROLLED POWER STEERING SYSTEM -
INFOID:0000000003702960
JCGWM0180GB
Revision: 2008 October
2009 Murano
POWER STEERING CONTROL UNIT
STC-15
< ECU DIAGNOSIS >
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Fail-Safe
INFOID:0000000003305959
EPS system
JCGWM0181GB
Revision: 2008 October
2009 Murano
STC-16
< ECU DIAGNOSIS >
POWER STEERING CONTROL UNIT
• EPS system enters the fail-safe mode (that allows the steering
force to be controlled without impairing the drivability) if any of the
input/output values to/from EPS system (power steering control
unit) deviate from the standard range.
NOTE:
The system enters the fail-safe mode if the engine speed remains
at 1,500 rpm or more for over 10 seconds while the vehicle is
stopped. This is normal.
• The fail-safe function is canceled when a vehicle speed signal of 2
km/h (1.2 MPH) or more is inputted or the ignition switch is turned
OFF
→
ON. EPS system restores the normal operation at that time.
JSGIA0368GB
Mode
Warn-
ing lamp
DTC
Detection point (malfunction part)
Error area and root cause
Fail-safe
function
—
—
Vehicle speed signal input
• Engine speed is 1,500 rpm or more and there is no vehicle
speed signal input for over 10 seconds during vehicle travel.
• Vehicle speed signal has abruptly dropped from 30 km/h (19
MPH) or more to 2 km/h (1.2 MPH) or less within 1.4 sec-
onds.
Revision: 2008 October
2009 Murano
UNBALANCE STEERING WHEEL TURNING FORCE (TORQUE VARIATION)
STC-17
< SYMPTOM DIAGNOSIS >
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SYMPTOM DIAGNOSIS
UNBALANCE STEERING WHEEL TURNING FORCE (TORQUE VARIA-
TION)
Description
INFOID:0000000003305960
• Hard steering when fully turning the steering wheel.
• Light steering when driving at a high speed.
Diagnosis Procedure
INFOID:0000000003305961
1.
CHECK SYSTEM FOR POWER SUPPLY AND GROUND
Perform trouble diagnosis for power supply and ground. Refer to
.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace damaged parts.
2.
CHECK SYSTEM FOR VEHICLE SPEED SIGNAL
Perform trouble diagnosis for vehicle speed signal. Refer to
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace damaged parts.
3.
CHECK SYSTEM FOR ENGINE SPEED SIGNAL
Perform trouble diagnosis for engine speed signal. Refer to
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace damaged parts.
4.
CHECK SYSTEM FOR POWER STEERING SOLENOID VALVE
Perform trouble diagnosis for power steering solenoid valve. Refer to
Is the inspection result normal?
YES
>> Perform the symptom diagnosis for the steering system. Refer to
.
NO
>> Repair or replace damaged parts.
Revision: 2008 October
2009 Murano
STC-18
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000003464597
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 AIRBAG” and “SEAT BELT” of this
Service Manual.
WARNING:
• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in
the event of a collision which 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 the “SRS AIRBAG”.
• 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
When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors while ignition switch is
ON or engine is running, never use air or electric power tools or strike near the sensor(s) with a hammer.
Heavy vibration may activate the sensor(s), deploy the airbag(s), possibly cause serious injury.
When using air or electric power tools or hammers, always turn OFF ignition switch, disconnect the battery,
and wait 3 minutes or more before performing any service.
Precaution Necessary for Steering Wheel Rotation after Battery Disconnect
INFOID:0000000003305963
NOTE:
• Before removing and installing any control units, first turn the push-button ignition switch to the LOCK posi-
tion, then disconnect both battery cables.
• After finishing work, confirm that all control unit connectors are connected properly, then re-connect both
battery cables.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If a DTC is detected, perform trouble diagnosis according to self-diagnosis results.
This vehicle is equipped with a push-button ignition switch and a steering lock unit.
If the battery is disconnected or discharged, the steering wheel will lock and cannot be turned.
If turning the steering wheel is required with the battery disconnected or discharged, follow the procedure
below before starting the repair operation.
OPERATION PROCEDURE
1.
Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged.
2.
Carry the Intelligent Key or insert it to the key slot and turn the push-button ignition switch to ACC position.
(At this time, the steering lock will be released.)
3.
Disconnect both battery cables. The steering lock will remain released with both battery cables discon-
nected and the steering wheel can be turned.
4.
Perform the necessary repair operation.
5.
When the repair work is completed, re-connect both battery cables. With the brake pedal released, turn
the push-button ignition switch from ACC position to ON position, then to LOCK position. (The steering
wheel will lock when the push-button ignition switch is turned to LOCK position.)
6.
Perform self-diagnosis check of all control units using CONSULT-III.
Revision: 2008 October
2009 Murano
POWER STEERING CONTROL UNIT
STC-19
< ON-VEHICLE REPAIR >
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ON-VEHICLE REPAIR
POWER STEERING CONTROL UNIT
Exploded View
INFOID:0000000003330738
Removal and Installation
INFOID:0000000003330739
REMOVAL
1.
Remove glove box assembly. Refer to
.
2.
Disconnect power steering control unit connector.
3.
Remove power steering control unit.
INSTALLATION
Install in the reverse order of removal.
1.
Steering member
2.
Power steering control unit
: Vehicle front
JSGIA0302ZZ
Revision: 2008 October
2009 Murano
STR-1
ENGINE
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SECTION
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CONTENTS
STARTING SYSTEM
BASIC INSPECTION . . . . . . . . .
DIAGNOSIS AND REPAIR WORKFLOW . . ..
Work Flow . . . . . . . . . . . . . . . .....
FUNCTION DIAGNOSIS . . . . . . . ...
STARTING SYSTEM . . . . . . . . . . ...
System Diagram . . . . . . . . . . . . . ....
System Description . . . . . . . . . . . . ...
Component Parts Location . . . . . . . . . ....
Component Description . . . . . . . . . . ....
COMPONENT DIAGNOSIS . . . . . . ..
B TERMINAL CIRCUIT . . . . . . . . . ...
Description . . . . . . . . . . . . . . . ....
Diagnosis Procedure . . . . . . . . . . . .....
S CONNECTOR CIRCUIT . . . . . . . . ...
Description . . . . . . . . . . . . . . . ....
Diagnosis Procedure . . . . . . . . . . . .....
STARTING SYSTEM . . . . . . . . . . ...
Wiring Diagram - STARTING SYSTEM - . . . . ..
SYMPTOM DIAGNOSIS . . . . . . . ..
STARTING SYSTEM . . . . . . . . . . ..
Symptom Table . . . . . . . . . . . . . ...
PRECAUTION . . . . . . . . . . . ..
PRECAUTIONS . . . . . . . . . . . . .
PREPARATION . . . . . . . . . . ...
PREPARATION . . . . . . . . . . . . .
Special Service Tools . . . . . . . . . . . ..
Commercial Service Tools . . . . . . . . . ...
ON-VEHICLE REPAIR . . . . . . . . .
STARTER MOTOR . . . . . . . . . . ...
Exploded View . . . . . . . . . . . . . . .
Removal and Installation . . . . . . . . . . .
Inspection . . . . . . . . . . . . . . . .
SERVICE DATA AND SPECIFICATIONS
(SDS) . . . . . . . . . . . . . . .
SERVICE DATA AND SPECIFICATIONS
(SDS) . . . . . . . . . . . . . . . . .
Starter Motor . . . . . . . . . . . . . . ...
Revision: 2008 October
2009 Murano
STR-2
< BASIC INSPECTION >
DIAGNOSIS AND REPAIR WORKFLOW
BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
Work Flow
INFOID:0000000003412966
OVERALL SEQUENCE
DETAILED FLOW
JSMIA0056GB
Revision: 2008 October
2009 Murano
DIAGNOSIS AND REPAIR WORKFLOW
STR-3
< BASIC INSPECTION >
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NOTE:
To ensure a complete and thorough diagnosis, the battery, starter motor and alternator test segments must be
done as a set from start to finish.
1.
DIAGNOSIS WITH STARTING/CHARGING SYSTEM TESTER
Perform the starting system test with Starting/Charging System Tester (SST: J-44373). For details and operat-
ing instructions, refer to Technical Service Bulletin.
Test result
CRANKING VOLTAGE NORMAL>>GO TO 2.
CRANKING VOLTAGE LOW>>GO TO 5.
CHARGE BATTERY>>Perform the slow battery charging procedure. (Initial rate of charge is 10A for 12
hours.) Perform battery test again. Refer to Technical Service Bulletin.
REPLACE BATTERY>>Before replacing battery, clean the battery cable clamps and battery posts. Perform
battery test again. Refer to Technical Service Bulletin. If second test result is “REPLACE BAT-
TERY”, then do so. Perform battery test again to confirm repair.
2.
CRANKING CHECK
Check that the starter motor operates correctly.
Does the engine crank normally?
YES
>> GO TO 3.
NO
>> GO TO 4.
3.
ENGINE START CHECK
Check that the engine starts.
Does the engine start?
YES
>> Starter motor is OK. INSPECTION END
NO
>> Perform further diagnosis of engine mechanical or engine control system. Once resolved, perform
battery test again.
4.
STARTER MOTOR ACTIVATION
Check that the starter motor operates.
Does the starter motor turn?
YES
>> Check ring gear and starter motor drive pinion. Once resolved, perform battery test again.
NO
>> GO TO 7.
5.
COMPARISON BETWEEN ENGINE COOLANT AND CRANKING VOLTAGE
Compare the engine coolant temperature and the cranking voltage with the specifications.
Minimum Specification of Cranking Voltage Referencing Coolant Temperature
Is the voltage less than the specified value?
YES
>> GO TO 7.
NO
>> GO TO 6.
6.
STARTER OPERATION
Check the starter operation status.
Does the starter motor turn smoothly?
YES
>> Starter motor is OK. INSPECTION END
NO
>> GO TO 7.
7.
“B” TERMINAL CIRCUIT INSPECTION
Check “B” terminal circuit. Refer to
.
Is “B” terminal circuit normal?
Engine coolant temperature [
°
C (
°
F)]
Voltage [V]
−
30 to
−
20 (
−
22 to
−
4)
8.6
−
19 to
−
10 (
−
2 to 14)
9.1
−
9 to 0 (16 to 32)
9.5
More than 1 (More than 34)
9.9
Revision: 2008 October
2009 Murano
STR-4
< BASIC INSPECTION >
DIAGNOSIS AND REPAIR WORKFLOW
YES
>> GO TO 8.
NO
>> Repair as needed.
8.
“S” CONNECTOR CIRCUIT INSPECTION
Check “S” connector circuit. Refer to
Is “S” connector circuit normal?
YES
>> GO TO 9.
NO
>> Repair as needed.
9.
ENGINE ROTATION STATUS
Check that the engine can be rotated by hand.
Does the engine turn freely by hand?
YES
>> Replace starter motor.
NO
>> Perform further diagnosis of engine mechanical or powertrain mechanism. Once resolved, per-
form battery test again. Refer to Technical Service Bulletin.
Revision: 2008 October
2009 Murano
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