Nissan Murano Z51 (2008 year). Manual — part 163
EC-424
< COMPONENT DIAGNOSIS >
[VQ35DE]
P2138 APP SENSOR
Diagnosis Procedure
INFOID:0000000003388230
1.
CHECK GROUND CONNECTION
1.
Turn ignition switch OFF.
2.
Check ground connection E38. Refer to Ground Inspection in
.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace ground connection.
2.
CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
1.
Disconnect accelerator pedal position (APP) sensor harness connector.
2.
Turn ignition switch ON.
3.
Check the voltage between APP sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
3.
CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-I
1.
Turn ignition switch ON.
2.
Check the voltage between APP sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> GO TO 4.
4.
CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-II
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between APP sensor harness connector and ECM harness connector.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair open circuit.
5.
CHECK SENSOR POWER SUPPLY CIRCUIT
Check harness for short to power and short to ground, between the following terminals.
APP sensor
Ground
Voltage (V)
Connector
Terminal
E110
4
Ground
Approx. 5
APP sensor
Ground
Voltage (V)
Connector
Terminal
E110
5
Ground
Approx. 5
APP sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
E110
5
E16
87
Existed
ECM
Sensor
Connector
Terminal
Name
Connector
Terminal
F8
72
Refrigerant pressure sensor
E300
1
76
CKP sensor (POS)
F20
1
Revision: 2008 October
2009 Murano
P2138 APP SENSOR
EC-425
< COMPONENT DIAGNOSIS >
[VQ35DE]
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Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair short to ground or short to power in harness or connectors.
6.
CHECK COMPONENTS
Check the following.
• Crankshaft position sensor (POS) (Refer to
EC-263, "Component Inspection"
• EVAP control system pressure sensor (Refer to
EC-302, "Component Inspection"
.)
• Refrigerant pressure sensor (Refer to
.)
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> Replace malfunctioning components.
7.
CHECK APP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between APP sensor harness connector and ECM harness connector.
4.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
8.
CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Check the continuity between APP sensor harness connector and ECM harness connector.
2.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
9.
CHECK APP SENSOR
EC-426, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> GO TO 10.
10.
REPLACE ACCELERATOR PEDAL ASSEMBLY
1.
Replace accelerator pedal assembly.
2.
EC-426, "Special Repair Requirement"
E16
87
APP sensor
E110
5
91
EVAP control system pressure sensor
B17
3
ECM
Sensor
Connector
Terminal
Name
Connector
Terminal
APP sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
E110
2
E16
84
Existed
1
100
APP sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
E110
3
E16
81
Existed
6
82
Revision: 2008 October
2009 Murano
EC-426
< COMPONENT DIAGNOSIS >
[VQ35DE]
P2138 APP SENSOR
>> INSPECTION END
11.
CHECK INTERMITTENT INCIDENT
GI-40, "Intermittent Incident"
>> INSPECTION END
Component Inspection
INFOID:0000000003591875
1.
CHECK ACCELERATOR PEDAL POSITION SENSOR
1.
Reconnect all harness connectors disconnected.
2.
Turn ignition switch ON.
3.
Check the voltage between ECM harness connector terminals under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 2.
2.
REPLACE ACCELERATOR PEDAL ASSEMBLY
1.
Replace accelerator pedal assembly.
2.
Go to
EC-426, "Special Repair Requirement"
.
>> INSPECTION END
Special Repair Requirement
INFOID:0000000003591879
1.
PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
Refer to
EC-17, "ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Requirement"
.
>> GO TO 2.
2.
PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
EC-17, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"
>> GO TO 3.
3.
PERFORM IDLE AIR VOLUME LEARNING
EC-17, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"
.
>> END
ECM
Condition
Voltage (V)
+
–
Connector
Terminal
Connector
Terminal
E16
81
(APP sensor 1 sig-
nal)
E16
84
(Sensor ground)
Accelerator pedal
Fully released
0.5 - 1.0
Fully depressed
4.2 - 4.8
82
(APP sensor 2 sig-
nal)
100
(Sensor ground)
Fully released
0.25 - 0.50
Fully depressed
2.0 - 2.5
Revision: 2008 October
2009 Murano
P2A00, P2A03 A/F SENSOR 1
EC-427
< COMPONENT DIAGNOSIS >
[VQ35DE]
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P2A00, P2A03 A/F SENSOR 1
Description
INFOID:0000000003591593
The air fuel ratio (A/F) sensor 1 is a planar one-cell limit current sen-
sor. The sensor element of the A/F sensor 1 is composed an elec-
trode layer, which transports ions. It has a heater in the element.
The sensor is capable of precise measurement = 1, but also in the
lean and rich range. Together with its control electronics, the sensor
outputs a clear, continuous signal throughout a wide range.
The exhaust gas components diffuse through the diffusion layer at
the sensor cell. An electrode layer is applied voltage, and this current
relative oxygen density in lean. Also this current relative hydrocar-
bon density in rich.
Therefore, the A/F sensor 1 is able to indicate air fuel ratio by this
electrode layer of current. In addition, a heater is integrated in the
sensor to ensure the required operating temperature of approxi-
mately 800
°
C (1,472
°
F).
DTC Logic
INFOID:0000000003388234
DTC DETECTION LOGIC
To judge the malfunction, the A/F signal computed by ECM from the A/F sensor 1 signal is monitored so it will
not shift to LEAN side or RICH side.
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1.
Turn ignition switch OFF and wait at least 10 seconds.
2.
Turn ignition switch ON.
3.
Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Clear the mixture ratio self-learning value. Refer to
EC-19, "MIXTURE RATIO SELF-LEARNING VALUE
CLEAR : Special Repair Requirement"
.
2.
Turn ignition switch OFF and wait at least 10 seconds.
JMBIA0112GB
PBIB3354E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible Cause
P2A00
Air fuel ratio (A/F) sensor 1
(bank 1) circuit range/per-
formance
• The output voltage computed by ECM from the
A/F sensor 1 signal shifts to the lean side for a
specified period.
• The A/F signal computed by ECM from the A/F
sensor 1 signal is shifts to the rich side for a
specified period.
• A/F sensor 1
• A/F sensor 1 heater
• Fuel pressure
• Fuel injector
• Intake air leakage
P2A03
Air fuel ratio (A/F) sensor 1
(bank 2) circuit range/per-
formance
Revision: 2008 October
2009 Murano
EC-428
< COMPONENT DIAGNOSIS >
[VQ35DE]
P2A00, P2A03 A/F SENSOR 1
3.
Turn ignition switch ON.
4.
Turn ignition switch OFF and wait at least 10 seconds.
5.
Start engine and keep the engine speed between 3,500 and 4,000 rpm for 1 minute under no load.
6.
Let engine idle for 1 minute.
7.
Keep engine speed between 2,500 and 3,000 rpm for 20 minutes.
8.
Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000003388235
1.
CHECK GROUND CONNECTION
1.
Turn ignition switch OFF.
2.
Check ground connection E38. Refer to Ground Inspection in
.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace ground connection.
2.
RETIGHTEN A/F SENSOR 1
Loosen and retighten the A/F sensor 1. Refer to
EM-34, "Removal and Installation"
.
>> GO TO 3.
3.
CHECK FOR INTAKE AIR LEAKAGE
1.
Start engine and run it at idle.
2.
Listen for an intake air leakage after the mass air flow sensor.
Is intake air leakage detected?
YES
>> GO TO 4.
NO
>> Repair or replace malfunctioning part.
4.
CLEAR THE MIXTURE RATIO SELF-LEARNING VALUE
1.
Clear the mixture ratio self-learning value. Refer to
EC-19, "MIXTURE RATIO SELF-LEARNING VALUE
CLEAR : Special Repair Requirement"
.
2.
Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0171, P0172, P0174 or P0175 detected? Is it difficult to start engine?
YES
>> Perform trouble diagnosis for DTC P0171, P0174 or P0172, P0175. Refer to
or
NO
>> GO TO 5.
5.
CHECK HARNESS CONNECTOR
1.
Turn ignition switch OFF.
2.
Disconnect A/F sensor 1 harness connector.
3.
Check harness connector for water.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace harness connector.
6.
CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT
1.
Disconnect A/F sensor 1 harness connector.
2.
Turn ignition switch ON.
3.
Check the voltage between A/F sensor 1 harness connector and ground.
Water should not exit.
Revision: 2008 October
2009 Murano
P2A00, P2A03 A/F SENSOR 1
EC-429
< COMPONENT DIAGNOSIS >
[VQ35DE]
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Is the inspection result normal?
YES
>> GO TO 8.
NO
>> GO TO 7.
7.
DETECT MALFUNCTIONING PART
Check the following.
• IPDM E/R harness connector F12
• 15 A fuse (No. 46)
• Harness for open or short between A/F sensor 1 and IPDM E/R
>> Repair or replace harness or connectors.
8.
CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between A/F sensor 1 harness connector and ECM harness connector.
4.
Check the continuity between A/F sensor 1 harness connector and ground, or ECM harness connector
and ground.
5.
Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
9.
CHECK INTERMITTENT INCIDENT
DTC
A/F sensor
Ground
Voltage (V)
Bank
Connector
Terminal
P2A00
1
F27
4
Ground
Battery voltage
P2A03
2
F64
4
DTC
A/F sensor 1
ECM
Continuity
Bank
Connector
Terminal
Connector
Terminal
P2A00
1
F27
1
F8
45
Existed
2
49
P2A03
2
F64
1
53
2
57
DTC
A/F sensor 1
Ground
Continuity
Bank
Connector
Terminal
P2A00
1
F27
1
Ground
Not existed
2
P2A03
2
F64
1
2
DTC
ECM
Ground
Continuity
Connector
Terminal
P2A00
F8
45
Ground
Not existed
49
P2A03
53
57
Revision: 2008 October
2009 Murano
EC-430
< COMPONENT DIAGNOSIS >
[VQ35DE]
P2A00, P2A03 A/F SENSOR 1
Perform
GI-40, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Repair or replace malfunctioning part.
10.
REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace malfunctioning air fuel ratio (A/F) sensor 1.
CAUTION:
• Discard any A/F sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
• Before installing new A/F sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner [commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant
(commercial service tool).
>> INSPECTION END
Revision: 2008 October
2009 Murano
ASCD BRAKE SWITCH
EC-431
< COMPONENT DIAGNOSIS >
[VQ35DE]
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ASCD BRAKE SWITCH
Description
INFOID:0000000003591756
When the brake pedal is depressed, ASCD brake switch is turned OFF and stop lamp switch is turned ON.
ECM detects the state of the brake pedal by those two types of input (ON/OFF signal).
Refer to
for the ASCD function.
Component Function Check
INFOID:0000000003388237
1.
CHECK ASCD BRAKE SWITCH FUNCTION
With CONSULT-III
1.
Turn ignition switch ON.
2.
Select “BRAKE SW1” in “DATA MONITOR” mode with CONSULT-III.
3.
Check “BRAKE SW1” indication under the following conditions.
Without CONSULT-III
1.
Turn ignition switch ON.
2.
Check the voltage between ECM harness connector terminals.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Diagnosis Procedure
INFOID:0000000003388238
1.
CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect ASCD brake switch harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between ASCD brake switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
DETECT MALFUNCTIONING PART
Check the following.
• Fuse block (J/B) connector E103
• 10 A fuse (No.3)
• Harness for open or short between ASCD brake switch and fuse
Monitor item
Condition
Indication
BRAKE SW1
Brake pedal
Slightly depressed
OFF
Fully released
ON
ECM
Condition
Voltage
Connector
+
–
Terminal
Terminal
E16
110
(ASCD brake
switch signal)
112
Brake pedal
Slightly depressed
Approx. 0 V
Fully released
Battery voltage
ASCD brake switch
Ground
Voltage
Connector
Terminal
E49
1
Ground
Battery voltage
Revision: 2008 October
2009 Murano
EC-432
< COMPONENT DIAGNOSIS >
[VQ35DE]
ASCD BRAKE SWITCH
>> Repair open circuit, short to ground or short to power in harness or connectors.
3.
CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between ASCD brake switch harness connector and ECM harness connector.
4.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
4.
CHECK ASCD BRAKE SWITCH
EC-432, "Component Inspection (ASCD Brake Switch)"
.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace ASCD brake switch.
5.
CHECK INTERMITTENT INCIDENT
GI-40, "Intermittent Incident"
>> INSPECTION END
Component Inspection (ASCD Brake Switch)
INFOID:0000000003591752
1.
CHECK ASCD BRAKE SWITCH-I
1.
Turn ignition switch OFF.
2.
Disconnect ASCD brake switch harness connector.
3.
Check the continuity between ASCD brake switch terminals under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 2.
2.
CHECK ASCD BRAKE SWITCH-II
1.
Adjust ASCD brake switch installation. Refer to
BR-9, "Inspection and Adjustment"
.
2.
Check the continuity between ASCD brake switch terminals under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace ASCD brake switch.
ASCD brake switch
ECM
Continuity
Connector
Terminal
Connector
Terminal
E49
2
E16
110
Existed
Terminals
Condition
Continuity
1 and 2
Brake pedal
Fully released
Existed
Slightly depressed
Not existed
Terminals
Condition
Continuity
1 and 2
Brake pedal
Fully released
Existed
Slightly depressed
Not existed
Revision: 2008 October
2009 Murano
ASCD INDICATOR
EC-433
< COMPONENT DIAGNOSIS >
[VQ35DE]
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ASCD INDICATOR
Description
INFOID:0000000003388241
ASCD indicator lamp illuminates to indicate ASCD operation status. CRUISE is integrated in combination
meter.
CRUISE illuminates when MAIN switch on ASCD steering switch is turned ON to indicated that ASCD system
is ready for operation.
Refer to
for the ASCD function.
Component Function Check
INFOID:0000000003388242
1.
CHECK ASCD INDICATOR FUNCTION
Check ASCD indicator under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Diagnosis Procedure
INFOID:0000000003388243
1.
CHECK DTC
Check that DTC UXXXX is not displayed.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Perform trouble diagnosis for DTC UXXXX.
2.
CHECK COMBINATION METER FUNCTION
MWI-34, "CONSULT-III Function (METER/M&A)"
.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace malfunctioning part.
3.
CHECK INTERMITTENT INCIDENT
GI-40, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> Replace combination meter.
NO
>> Repair or replace malfunctioning part.
ASCD INDICATOR
CONDITION
SPECIFICATION
CRUISE
• Ignition switch: ON
• MAIN switch: Pressed at the
1st time
→
at the 2nd time
ON
→
OFF
Revision: 2008 October
2009 Murano
EC-434
< COMPONENT DIAGNOSIS >
[VQ35DE]
COOLING FAN
COOLING FAN
Description
INFOID:0000000003388244
The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, refrigerant
pressure, and air conditioner ON signal. The control system has 4-step control [HIGH/MIDDLE/LOW/OFF].
COOLING FAN MOTOR
The cooling fan operates at each speed when the current flows in the cooling fan motor as per the following.
The cooling fan operates at low (LOW) speed when cooling fan motors-1 and -2 are circuited in series under
the middle speed condition.
Refer to
Component Function Check
INFOID:0000000003388245
1.
CHECK COOLING FAN FUNCTION
With CONSULT-III
1.
Turn ignition switch ON.
2.
Perform “COOLING FAN” in “ACTIVE TEST” mode with CONSULT-III.
3.
Check that cooling fan operates at each speed.
Without CONSULT-III
1.
Perform IPDM E/R auto active test and check cooling fan motors operation, refer to
.
2.
Check that cooling fan operates at each speed.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Diagnosis Procedure
INFOID:0000000003388246
1.
CHECK COOLING FAN RELAY POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect cooling fan relays-2, -3.
3.
Turn ignition switch ON.
4.
Check the voltage between cooling fan relays-2, -3 harness connectors and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
Cooling fan speed
Cooling fan motor terminals
(+)
(–)
Middle (MID)
1
3 and 4
2
3 and 4
1 and 2
3
1 and 2
4
High (HI)
1 and 2
3 and 4
Cooling fan relay
Ground
Voltage
Connector
Terminal
E57
(cooling fan relay-2)
2
Ground
Battery voltage
5
E59
(cooling fan relay-3)
2
5
Revision: 2008 October
2009 Murano
COOLING FAN
EC-435
< COMPONENT DIAGNOSIS >
[VQ35DE]
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2.
DETECT MALFUNCTIONING PART
Check the following.
• 40 A fusible link (letter K)
• 10 A fuse (No. 42)
• IPDM E/R harness connector E10
• Harness for open or short between cooling fan relay-2 and battery
• Harness for open or short between cooling fan relay-3 and battery
• Harness for open or short between cooling fan relay-2 and IPDM E/R
• Harness for open or short between cooling fan relay-3 and IPDM E/R
>> Repair open circuit, short to ground or short to power in harness or connectors.
3.
CHECK COOLING FAN RELAY OUTPUT SIGNAL CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect IPDM E/R harness connectors.
3.
Check the continuity between cooling fan relay-2, -3 harness connectors and IPDM E/R harness connec-
tor.
4.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
4.
CHECK COOLING FAN MOTOR POWER SUPPLY CIRCUIT
1.
Disconnect cooling fan motor-1 harness connector.
2.
Check the voltage between cooling fan motor-1 harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> GO TO 5.
5.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connector E70, E305
• 40 A fusible link (letter M)
• Harness for open or short between cooling fan motor-1 and battery
>> Repair open circuit, short to ground or short to power in harness or connectors.
6.
CHECK COOLING FAN MOTOR CIRCUIT-I
1.
Disconnect cooling fan motor-2 harness connector.
2.
Check the continuity between cooling fan relay-2, -3 harness connectors and cooling fan motor-1, -2 har-
ness connectors.
Cooling fan relay
IPDM E/R
Continuity
Connector
Terminal
Connector
Terminal
E57
(cooling fan relay-2)
1
E11
42
Existed
E59
(cooling fan relay-3)
1
E10
34
Cooling fan motor-1
Ground
Voltage
Connector
Terminal
E301
1
Ground
Battery voltage
2
Revision: 2008 October
2009 Murano
EC-436
< COMPONENT DIAGNOSIS >
[VQ35DE]
COOLING FAN
3.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> GO TO 7.
7.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connector E70, E305
• Harness for open or short between cooling fan motor-1 and cooling fan relay-2
• Harness for open or short between cooling fan motor-1 and cooling fan relay-3
• Harness for open or short between cooling fan motor-2 and cooling fan relay-2
• Harness for open or short between cooling fan motor-2 and cooling fan relay-3
>> Repair open circuit, short to ground or short to power in harness or connectors.
8.
CHECK COOLING FAN MOTOR CIRCUIT-II
1.
Check the continuity between IPDM E/R harness connector and cooling fan motor-1, -2 harness connec-
tor.
2.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> GO TO 9.
9.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connector E70, E305
• Harness for open or short between cooling fan motor-1 and IPDM E/R
• Harness for open or short between cooling fan motor-2 and IPDM E/R
>> Repair open circuit, short to ground or short to power in harness or connectors.
10.
CHECK COOLING FAN MOTOR CIRCUIT-III
1.
Check the continuity between cooling fan relay-2, -3 harness connectors and ground.
Cooling fan relay
Cooling fan motor
Continuity
Connector
Terminal
Connector
Terminal
E57
(cooling fan relay-2)
3
E302
(Cooling fan motor-2)
2
Existed
7
E301
(Cooling fan motor-1)
3
E59
(cooling fan relay-3)
3
E302
(Cooling fan motor-2)
1
7
E301
(Cooling fan motor-1)
4
IPDM E/R
Cooling fan motor
Continuity
Connector
Terminal
Connector
Terminal
E10
35
E301
(Cooling fan motor-1)
4
Existed
38
E302
(Cooling fan motor-2)
1
Revision: 2008 October
2009 Murano
COOLING FAN
EC-437
< COMPONENT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
2.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
11.
CHECK COOLING FAN MOTOR CIRCUIT-IV
1.
Check the continuity between cooling fan motor-2 harness connector and ground.
2.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 12.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
12.
CHECK COOLING FAN RELAYS-2 AND -3
EC-438, "Component Inspection (Cooling Fan Relay)"
Is the inspection result normal?
YES
>> GO TO 13.
NO
>> Replace malfunctioning cooling fan relay.
13.
CHECK COOLING FAN MOTORS-1 AND -2
EC-437, "Component Inspection (Cooling Fan Motor)"
Is the inspection result normal?
YES
>> GO TO 14.
NO
>> Replace malfunctioning cooling fan motor.
14.
CHECK INTERMITTENT INCIDENT
Perform
GI-40, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> Replace IPDM E/R.
NO
>> Repair or replace harness connectors.
Component Inspection (Cooling Fan Motor)
INFOID:0000000003388247
1.
CHECK COOLING FAN MOTOR
1.
Turn ignition switch OFF.
2.
Disconnect cooling fan motor harness connector.
3.
Supply cooling fan motor terminals with battery voltage and check operation.
Cooling fan motor
Ground
Continuity
Connector
Terminal
E57
(cooling fan relay-2)
6
Ground
Existed
E59
(cooling fan relay-3)
6
Cooling fan motor-2
Ground
Continuity
Connector
Terminal
E302
3
Ground
Existed
4
Revision: 2008 October
2009 Murano
EC-438
< COMPONENT DIAGNOSIS >
[VQ35DE]
COOLING FAN
Check that cooling fan speed of condition B is higher than that of A.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace cooling fan motor.
Component Inspection (Cooling Fan Relay)
INFOID:0000000003388248
1.
CHECK COOLING FAN RELAY
1.
Disconnect cooling fan relays -2, -3 harness connectors.
2.
Check continuity between cooling fan relay -2, -3 terminals
under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace cooling fan relay.
Condition
Terminals
(+)
(
−
)
Cooling fan motor
A
1
3 and 4
2
3 and 4
1 and 2
3
1 and 2
4
B
1, 2
3, 4
Terminals
Conditions
Continuity
3 and 5
6 and 7
12 V direct current supply between terminals 1 and 2
Existed
No current supply
Not existed
SEF745U
Revision: 2008 October
2009 Murano
ELECTRICAL LOAD SIGNAL
EC-439
< COMPONENT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
ELECTRICAL LOAD SIGNAL
Description
INFOID:0000000003388249
The electrical load signal (Headlamp switch signal, rear window defogger switch signal, etc.) is transferred via
the CAN communication.
Component Function Check
INFOID:0000000003388250
1.
CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION
1.
Turn ignition switch ON.
2.
Connect CONSULT-III and select “DATA MONITOR” mode.
3.
Select “LOAD SIGNAL” and check indication under the following conditions.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Go to
2.
CHECK LIGHTING SWITCH FUNCTION
Check “LOAD SIGNAL” indication under the following conditions.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Go to
3.
CHECK HEATER FAN CONTROL SWITCH FUNCTION
Select “HEATER FAN SW” and check indication under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Diagnosis Procedure
INFOID:0000000003388251
1.
INSPECTION START
Confirm the malfunctioning circuit (rear window defogger, headlamp or heater fan). Refer to
Which circuit is related to the incident?
Rear window defogger>>GO TO 2.
Headlamp>>GO TO 3.
Heater fan>>GO TO 4.
2.
CHECK REAR WINDOW DEFOGGER SYSTEM
.
Monitor item
Condition
Indication
LOAD SIGNAL
Rear window defogger switch
ON
ON
OFF
OFF
Monitor item
Condition
Indication
LOAD SIGNAL
Lighting switch
ON at 2nd position
ON
OFF
OFF
Monitor item
Condition
Indication
HEATER FAN SW
Heater fan control switch
ON
ON
OFF
OFF
Revision: 2008 October
2009 Murano
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