Nissan Murano Z50 (2003 year). Manual — part 86
TROUBLE DIAGNOSIS
EC-95
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Revision; 2004 April
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●
Fuel filler cap was left off or incorrectly screwed on, allowing fuel to evaporate into the atmosphere.
Worksheet Sample
MTBL0017
EC-96
TROUBLE DIAGNOSIS
Revision; 2004 April
2003 Murano
DTC Inspection Priority Chart
ABS004AT
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
NOTE:
If DTC U1000 and/or U1001 is displayed with other DTC, first perform the trouble diagnosis for DTC
U1000, U1001. Refer to
Priority
Detected items (DTC)
1
●
U1000 U1001 CAN communication line
●
P0101 P0102 P0103 Mass air flow sensor
●
P0112 P0113 P0127 Intake air temperature sensor
●
P0117 P0118 P0125 Engine coolant temperature sensor
●
P0128 Thermostat function
●
P0122 P0123 P0222 P0223 P1225 P1226 P2135 Throttle position sensor
●
P0181 P0182 P0183 Fuel tank temperature sensor
●
P0327 P0328 Knock sensor
●
P0335 Crankshaft position sensor (POS)
●
P0340 P0345 Camshaft position sensor (PHASE)
●
P0460 P0461 P0462 P0463 Fuel level sensor
●
P0500 Vehicle speed sensor
●
P0605 ECM
●
P0705 Park/Neutral position (PNP) switch
●
P1229 Sensor power supply
●
P1610 - P1615 NATS
●
P1700 CVT control system
●
P1706 Park/Neutral position (PNP) switch
●
P2122 P2123 P2127 P2128 P2138 Accelerator pedal position sensor
TROUBLE DIAGNOSIS
EC-97
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2
●
P0031P0032 P0051 P0052 Heated oxygen sensor 1 heater
●
P0037 P0038 P0057 P0058 Heated oxygen sensor 2 heater
●
P0132 P0133 P0134 P0152 P0153 P0154 P1143 P1144 P1163 P1164 Heated oxygen sensor 1
●
P0138 P0139 P0158 P0159 P1146 P1147 P1166 P1167 Heated oxygen sensor 2
●
P0441 EVAP control system purge flow monitoring
●
P0444 P0445 P1444 EVAP canister purge volume control solenoid valve
●
P0447 P1446 EVAP canister vent control valve
●
P0451 P0452 P0453 EVAP control system pressure sensor
●
P0550 Power steering pressure sensor
●
P0710 P0715 P0720 P0740 P0744 P0745 P0746 P0776 P0778 P0840 P0845 P1740 CVT related sensors, solenoid
valves and switches
●
P1065 ECM power supply
●
P1111 P1136 Intake valve timing control solenoid valve
●
P1122 Electric throttle control function
●
P1124 P1126 P1128 Electric throttle control actuator
●
P1217 Engine over temperature (OVERHEAT)
●
P1720 Vehicle speed sensor
●
P1777 P1778 CVT step motor
●
P1805 Brake switch
3
●
P0011 P0021 Intake valve timing control
●
P0171 P0172 P0174 P0175 Fuel injection system function
●
P0300 - P0306 Misfire
●
P0420 P0430 Three way catalyst function
●
P0442 P0456 EVAP control system
●
P0506 P0507 Idle speed control system
●
P1121 Electric throttle control actuator
●
P1148 P1168 Closed loop control
●
P1211 TCS control unit
●
P1212 TCS communication line
●
P1564 ASCD steering switch
●
P1572 ASCD brake switch
●
P1574 ASCD vehicle speed sensor
●
P1715 Primary speed sensor
●
P1800 VIAS control solenoid valve
Priority
Detected items (DTC)
EC-98
TROUBLE DIAGNOSIS
Revision; 2004 April
2003 Murano
Fail-safe Chart
ABS004AU
When the DTC listed below is detected, the ECM enters fail-safe mode and the MIL lights up.
●
When there is an open circuit on MIL circuit, the ECM cannot warn the driver by lighting MIL up when
there is malfunction on engine control system.
Therefore, when electrical controlled throttle and part of ECM related diagnoses are continuously detected
as NG for 5 trips, ECM warns the driver that engine control system malfunctions and MIL circuit is open by
means of operating fail-safe function.
The fail-safe function also operates when above diagnoses except MIL circuit are detected and demands
the driver to repair the malfunction.
DTC No.
Detected items
Engine operating condition in fail-safe mode
P0102
P0103
Mass air flow sensor circuit
Engine speed will not rise more than 2,400 rpm due to the fuel cut.
P0117
P0118
Engine coolant tempera-
ture sensor circuit
Engine coolant temperature will be determined by ECM based on the time after turning
ignition switch “ON” or “START”.
CONSULT-II displays the engine coolant temperature decided by ECM.
Condition
Engine coolant temperature decided
(CONSULT-II display)
Just as ignition switch is turned
ON or Start
40
°
C (104
°
F)
More than approx. 4 minutes after
ignition ON or Start
80
°
C (176
°
F)
Except as shown above
40 - 80
°
C (104 - 176
°
F)
(Depends on the time)
When the fail-safe system for engine coolant temperature sensor is activated, the cooling
fan operates while engine is running.
P0122
P0123
P0222
P0223
P2135
Throttle position sensor
The ECM controls the electric throttle control actuator in regulating the throttle opening in
order for the idle position to be within +10 degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal
condition.
So, the acceleration will be poor.
P1121
Electric throttle control
actuator
(When electric throttle control actuator does not function properly due to the return spring
malfunction:)
ECM controls the electric throttle actuator by regulating the throttle opening around the
idle position. The engine speed will not rise more than 2,000 rpm.
(When throttle valve opening angle in fail-safe mode is not in specified range:)
ECM controls the electric throttle control actuator by regulating the throttle opening to 20
degrees or less.
(When ECM detects the throttle valve is stuck open:)
While the vehicle is driving, it slows down gradually by fuel cut. After the vehicle stops,
the engine stalls.
The engine can restart in N or P position, and engine speed will not exceed 1,000 rpm or
more.
P1122
Electric throttle control
function
ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P1124
P1126
Throttle control motor relay
ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P1128
Throttle control motor
ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P1229
Sensor power supply
ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P2122
P2123
P2127
P2128
P2138
Accelerator pedal position
sensor
The ECM controls the electric throttle control actuator in regulating the throttle opening in
order for the idle position to be within +10 degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal
condition.
So, the acceleration will be poor.
Engine operating condition in fail-safe mode
Engine speed will not rise more than 2,500 rpm due to the fuel cut
TROUBLE DIAGNOSIS
EC-99
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Basic Inspection
ABS004AV
1.
INSPECTION START
1.
Check service records for any recent repairs that may indicate a related malfunction, or a current need for
scheduled maintenance.
2.
Open engine hood and check the following:
–
Harness connectors for improper connections
–
Wiring harness for improper connections, pinches and cut
–
Vacuum hoses for splits, kinks and improper connections
–
Hoses and ducts for leaks
–
Air cleaner clogging
–
Gasket
3.
Confirm that electrical or mechanical loads are not applied.
–
Headlamp switch is OFF.
–
Air conditioner switch is OFF.
–
Rear window defogger switch is OFF.
–
Steering wheel is in the straight-ahead position, etc.
4.
Start engine and warm it up until engine coolant temperature
indicator points the middle of gauge.
Ensure engine stays below 1,000 rpm.
5.
Run engine at about 2,000 rpm for about 2 minutes under no-
load.
6.
Make sure that no DTC is displayed with CONSULT-II or GST.
OK or NG
OK
>> GO TO 3.
NG
>> GO TO 2.
2.
REPAIR OR REPLACE
Repair or replace components as necessary according to corresponding “Diagnostic Procedure”.
>> GO TO 3.
SEF983U
SEF976U
SEF977U
EC-100
TROUBLE DIAGNOSIS
Revision; 2004 April
2003 Murano
3.
CHECK TARGET IDLE SPEED
With CONSULT-II
1.
Run engine at about 2,000 rpm for about 2 minutes under no-load.
2.
Rev engine (2,000 to 3,000 rpm) two or three times under no-
load, then run engine at idle speed for about 1 minute.
3.
Read idle speed in “DATA MONITOR” mode with CONSULT-II.
Without CONSULT-II
1.
Run engine at about 2,000 rpm for about 2 minutes under no-load.
2.
Rev engine (2,000 to 3,000 rpm) two or three times under no-load, then run engine at idle speed for about
1 minute.
3.
Check idle speed.
OK or NG
OK
>> GO TO 10.
NG
>> GO TO 4.
4.
PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
1.
Stop engine.
2.
Perform
EC-63, "Accelerator Pedal Released Position Learning"
.
>> GO TO 5.
5.
PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Perform
EC-64, "Throttle Valve Closed Position Learning"
>> GO TO 6.
SEF978U
CVT:
650
±
50 rpm (in "P" or "N" position)
SEF058Y
CVT:
650
±
50 rpm (in "P" or "N" position)
TROUBLE DIAGNOSIS
EC-101
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Revision; 2004 April
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6.
PERFORM IDLE AIR VOLUME LEARNING
Refer to
EC-64, "Idle Air Volume Learning"
.
Is Idle Air Volume Learning carried out successfully?
Yes or No
Yes
>> GO TO 7.
No
>> 1. Follow the instruction of “Idle Air Volume Learning”.
2. GO TO 4.
7.
CHECK TARGET IDLE SPEED AGAIN
With CONSULT-II
1.
Start engine and warm it up to normal operating temperature.
2.
Read idle speed in “DATA MONITOR” mode with CONSULT-II.
Without CONSULT-II
1.
Start engine and warm it up to normal operating temperature.
2.
Check idle speed.
OK or NG
OK
>> GO TO 10.
NG
>> GO TO 8.
8.
DETECT MALFUNCTIONING PART
Check the following.
●
Check camshaft position sensor (PHASE) and circuit. Refer to
.
●
Check crankshaft position sensor (POS) and circuit. Refer to
OK or NG
OK
>> GO TO 9.
NG
>> 1. Repair or replace.
2. GO TO 4.
9.
CHECK ECM FUNCTION
1.
Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but
this is the rarely the case.)
2.
Perform initialization of NVIS (NATS) system and registration of NVIS (NATS) ignition key IDs. Refer to
EC-83, "NVIS (Nissan Vehicle Immobilizer System — NATS)"
.
>> GO TO 4.
10.
CHECK IGNITION TIMING
1.
Run engine at idle.
2.
Check ignition timing with a timing light.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 11.
CVT:
650
±
50 rpm (in "P" or "N" position)
CVT:
650
±
50 rpm (in "P" or "N" position)
CVT:
15
±
5
°
BTDC (in "P" or "N" position)
EC-102
TROUBLE DIAGNOSIS
Revision; 2004 April
2003 Murano
11.
PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
1.
Stop engine.
2.
Perform
EC-63, "Accelerator Pedal Released Position Learning"
.
>> GO TO 12.
12.
PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Perform
EC-64, "Throttle Valve Closed Position Learning"
>> GO TO 13.
13.
PERFORM IDLE AIR VOLUME LEARNING
Refer to
EC-64, "Idle Air Volume Learning"
Is Idle Air Volume Learning carried out successfully?
Yes or No
Yes
>> GO TO 14.
No
>> 1. Follow the instruction of “Idle Air Volume Learning”.
2. GO TO 4.
14.
CHECK TARGET IDLE SPEED AGAIN
With CONSULT-II
1.
Start engine and warm it up to normal operating temperature.
2.
Read idle speed in “DATA MONITOR” mode with CONSULT-II.
Without CONSULT-II
1.
Start engine and warm it up to normal operating temperature.
2.
Check idle speed.
OK or NG
OK
>> GO TO 15.
NG
>> GO TO 17.
15.
CHECK IGNITION TIMING AGAIN
1.
Run engine at idle.
2.
Check ignition timing with a timing light.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 16.
16.
CHECK TIMING CHAIN INSTALLATION
Check timing chain installation. Refer to
.
OK or NG
OK
>> GO TO 17.
NG
>> 1. Repair the timing chain installation.
2. GO TO 4.
CVT:
650
±
50 rpm (in "P" or "N" position)
CVT:
650
±
50 rpm (in "P" or "N" position)
CVT:
15
±
5
°
BTDC (in "P" or "N" position)
TROUBLE DIAGNOSIS
EC-103
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17.
DETECT MALFUNCTIONING PART
Check the following.
●
Check camshaft position sensor (PHASE) and circuit. Refer to
.
●
Check crankshaft position sensor (POS) and circuit. Refer to
OK or NG
OK
>> GO TO 18.
NG
>> 1. Repair or replace.
2. GO TO 4.
18.
CHECK ECM FUNCTION
1.
Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but
this is the rarely the case.)
2.
Perform initialization of NVIS (NATS) system and registration of NVIS (NATS) ignition key IDs. Refer to
EC-83, "NVIS (Nissan Vehicle Immobilizer System — NATS)"
.
>> GO TO 4.
Symptom Matrix Chart
ABS004AW
SYSTEM — BASIC ENGINE CONTROL SYSTEM
SYMPTOM
Reference
page
HARD/
NO ST
AR
T
/REST
AR
T (
EXCP
.
HA)
ENGI
NE ST
ALL
HESI
T
A
TION/
SURGING/
FL
A
T
SPOT
SP
ARK KNOCK/DET
ONA
T
IO
N
L
A
CK OF
POW
ER/
P
O
OR ACCEL
ERA
TION
HI
GH I
D
L
E
/L
OW
I
D
L
E
RO
UGH IDL
E/
HUNTING
ID
LING VI
BRA
TION
SL
OW
/NO RETURN
T
O
I
D
L
E
OVERHEA
TS/
W
A
TER TEMPERA
TURE HI
GH
EXCESSIVE FUEL
CONSUMP
T
IO
N
EXCESSIVE OIL
CONSUM
P
T
ION
BA
TTER
Y
DEAD (
UNDER CHARGE)
Warranty symptom code
AA
AB
AC
AD
AE
AF
AG
AH
AJ
AK
AL
AM
HA
Fuel
Fuel pump circuit
1
1
2
3
2
2
2
3
2
Fuel pressure regulator system
3
3
4
4
4
4
4
4
4
4
Injector circuit
1
1
2
3
2
2
2
2
Evaporative emission system
3
3
4
4
4
4
4
4
4
4
Air
Positive crankcase ventilation sys-
tem
3
3
4
4
4
4
4
4
4
4
1
Incorrect idle speed adjustment
1
1
1
1
1
Electric throttle control actuator
1
1
2
3
3
2
2
2
2
2
2
Ignition
Incorrect ignition timing adjustment
3
3
1
1
1
1
1
1
Ignition circuit
1
1
2
2
2
2
2
2
Main power supply and ground circuit
2
2
3
3
3
3
3
2
3
EC-104
TROUBLE DIAGNOSIS
Revision; 2004 April
2003 Murano
1 - 6: The numbers refer to the order of inspection.
(continued on next page)
Mass air flow sensor circuit
1
1
2
2
2
2
2
2
,
Engine coolant temperature sensor circuit
3
3
3
,
Heated oxygen sensor 1 circuit
,
,
,
,
Throttle position sensor circuit
2
2
,
,
,
,
,
Accelerator pedal position sensor circuit
3
2
1
,
,
Knock sensor circuit
2
3
Crankshaft position sensor (POS) circuit
2
2
Camshaft position sensor (PHASE) circuit
3
2
Vehicle speed signal circuit
2
3
3
3
Power steering pressure sensor circuit
2
3
3
ECM
2
2
3
3
3
3
3
3
3
3
3
,
Intake valve timing control solenoid valve cir-
cuit
3
2
1
3
2
2
3
3
PNP switch circuit
3
3
3
3
3
VIAS control solenoid valve circuit
1
Refrigerant pressure sensor circuit
2
3
3
4
Electrical load signal circuit
3
Air conditioner circuit
2
2
3
3
3
3
3
3
3
3
2
VDC/TCS/ABS control unit
ABS actuator and electric unit (control unit)
4
SYMPTOM
Reference
page
HARD/
NO ST
AR
T
/REST
AR
T (
EXCP
. H
A
)
ENGI
NE ST
ALL
HESI
T
A
TION/
SURGING/
FL
A
T
SPOT
SP
ARK KNOCK/DET
ONA
T
IO
N
L
A
CK OF
POW
ER/POO
R ACCEL
ERA
TION
HI
GH I
D
L
E
/L
OW
I
D
L
E
ROUG
H IDL
E/
HUNTING
ID
L
ING VI
BRA
TION
SL
OW
/N
O RETURN
T
O
I
D
L
E
OVERHEA
TS/
W
A
TER TEMPERA
TURE HI
GH
EXCESSIVE F
U
E
L
CONSUMP
T
IO
N
EXCESSIVE OIL
CONSUM
P
T
ION
BA
TTER
Y
DEAD (
UNDER CHARGE)
Warranty symptom code
AA
AB
AC
AD
AE
AF
AG
AH
AJ
AK
AL
AM
HA
TROUBLE DIAGNOSIS
EC-105
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Revision; 2004 April
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SYSTEM — ENGINE MECHANICAL & OTHER
SYMPTOM
Reference
page
HARD/
NO ST
AR
T/
REST
AR
T (
E
X
C
P
. HA)
ENGI
NE ST
ALL
HESIT
A
TION/SURG
ING/FL
A
T
S
P
OT
SP
ARK K
N
O
C
K/DET
ONA
T
IO
N
L
A
CK
OF P
O
W
E
R/POOR ACCEL
E
R
A
TION
HI
GH ID
L
E
/L
OW
I
D
L
E
ROUGH IDL
E/HUNTI
NG
ID
L
ING VI
B
R
A
T
ION
SL
OW
/N
O RETURN
T
O
I
D
L
E
OVERHEA
TS/W
A
T
ER TEMPERA
TURE
HI
GH
EXCESSIVE FUEL CO
NSUMP
T
ION
EXCESSIVE O
IL CONSUMP
T
IO
N
BA
TTER
Y DEA
D (UNDER CHARGE)
Warranty symptom code
AA
AB
AC
AD
AE
AF
AG
AH
AJ
AK
AL
AM
HA
Fuel
Fuel tank
5
5
Fuel piping
5
5
5
5
5
5
Vapor lock
—
Valve deposit
5
5
5
5
5
5
5
—
Poor fuel (Heavy weight gaso-
line, Low octane)
—
Air
Air duct
5
5
5
5
5
5
Air cleaner
Air leakage from air duct
(Mass air flow sensor — electric
throttle control actuator)
5
5
5
5
Electric throttle control actuator
Air leakage from intake manifold/
Collector/Gasket
Cranking
Battery
1
1
1
1
1
1
1
1
Generator circuit
Starter circuit
3
Signal plate
6
PNP switch
4
Engine
Cylinder head
5
5
5
5
5
5
5
5
Cylinder head gasket
4
3
Cylinder block
6
6
6
6
6
6
6
6
4
Piston
Piston ring
Connecting rod
Bearing
Crankshaft
Valve
mecha-
nism
Timing chain
5
5
5
5
5
5
5
5
Camshaft
Intake valve timing control
Intake valve
3
Exhaust valve
EC-106
TROUBLE DIAGNOSIS
Revision; 2004 April
2003 Murano
1 - 6: The numbers refer to the order of inspection.
Exhaust
Exhaust manifold/Tube/Muffler/
Gasket
5
5
5
5
5
5
5
5
,
Three way catalyst
Lubrica-
tion
Oil pan/Oil strainer/Oil pump/Oil
filter/Oil gallery/Oil cooler
5
5
5
5
5
5
5
5
,
,
Oil level (Low)/Filthy oil
Cooling
Radiator/Hose/Radiator filler cap
5
5
5
5
5
5
5
4
5
,
Thermostat
5
Water pump
Water gallery
Coolant level (Low)/Contami-
nated coolant
5
NVIS (NISSAN Vehicle Immobilizer System —
NATS)
1
1
SYMPTOM
Reference
page
HARD/
NO ST
AR
T
/REST
AR
T (
EXCP
. H
A
)
ENGI
NE ST
ALL
HESI
T
A
TION/
SURGING/
FL
A
T
SPOT
SP
ARK KNOCK/DET
ONA
T
IO
N
L
A
CK OF
POW
ER/POO
R ACCEL
ERA
TION
HI
GH I
D
L
E
/L
OW
I
D
L
E
ROUG
H IDL
E/
HUNTING
ID
L
ING VI
BRA
TION
SL
OW
/N
O RETURN
T
O
I
D
L
E
OVERHEA
TS/
W
A
TER TEMPERA
TURE HI
GH
EXCESSIVE F
U
E
L
CONSUMP
T
IO
N
EXCESSIVE OIL
CONSUM
P
T
ION
BA
TTER
Y
DEAD (
UNDER CHARGE)
Warranty symptom code
AA
AB
AC
AD
AE
AF
AG
AH
AJ
AK
AL
AM
HA
TROUBLE DIAGNOSIS
EC-107
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EC
Revision; 2004 April
2003 Murano
Engine Control Component Parts Location
ABS004AX
PBIB1289E
EC-108
TROUBLE DIAGNOSIS
Revision; 2004 April
2003 Murano
PBIB1290E
TROUBLE DIAGNOSIS
EC-109
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EC
Revision; 2004 April
2003 Murano
PBIB1291E
EC-110
TROUBLE DIAGNOSIS
Revision; 2004 April
2003 Murano
PBIB1292E
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