Nissan Murano Z50 (2003 year). Manual — part 119
FUEL PUMP CIRCUIT
EC-623
C
D
E
F
G
H
I
J
K
L
M
A
EC
Revision; 2004 April
2003 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 startabil-
ity. 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 igni-
tion 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
ON
●
Except above conditions
OFF
EC-624
FUEL PUMP CIRCUIT
Revision; 2004 April
2003 Murano
Wiring Diagram
ABS004OM
TBWA0391E
FUEL PUMP CIRCUIT
EC-625
C
D
E
F
G
H
I
J
K
L
M
A
EC
Revision; 2004 April
2003 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
1.
CHECK OVERALL FUNCTION
1.
Turn ignition switch “ON”.
2.
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
OK
>> INSPECTION END
NG
>> GO TO 2.
2.
CHECK FUEL PUMP POWER SUPPLY CIRCUIT-I
1.
Turn ignition switch “OFF”.
2.
Disconnect ECM harness connector.
3.
Turn ignition switch “ON”.
4.
Check voltage between ECM terminal 113 and ground with
CONSULT-II or tester.
OK or NG
OK
>> GO TO 5.
NG
>> 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
EC-626
FUEL PUMP CIRCUIT
Revision; 2004 April
2003 Murano
3.
CHECK FUEL PUMP POWER SUPPLY CIRCUIT-I
1.
Turn ignition switch “ON”.
2.
Check voltage between IPDM E/R terminal 20 and ground with
CONSULT-II or tester.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 12.
4.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors E109, M6
●
Harness for open or short between IPDM E/R and ECM
>> Repair harness or connectors.
5.
CHECK CONDENSER POWER SUPPLY CIRCUIT-I
1.
Turn ignition switch “OFF”.
2.
Reconnect all harness connectors disconnected.
3.
Disconnect condenser harness connector.
4.
Turn ignition switch “ON”.
5.
Check voltage between condenser terminal 1 and ground with
CONSULT-II or tester.
6.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 9.
NG
>> GO TO 6.
6.
CHECK 15A FUSE
1.
Turn ignition switch “OFF”.
2.
Disconnect 15A fuse.
3.
Check 15A fuse.
OK or NG
OK
>> GO TO 7.
NG
>> Replace fuse.
Voltage: Battery voltage
PBIB1397E
Voltage:
Battery voltage should exist for 1 second
after ignition switch is turned “ON”.
PBIB0624E
FUEL PUMP CIRCUIT
EC-627
C
D
E
F
G
H
I
J
K
L
M
A
EC
Revision; 2004 April
2003 Murano
7.
CHECK CONDENSER POWER SUPPLY CIRCUIT-II
1.
Disconnect IPDM E/R harness connector E7.
2.
Check harness continuity between IPDM E/R terminal 23 and condenser terminal 1.
Refer to Wiring Diagram.
3.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 12.
NG
>> GO TO 8.
8.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors E106, B5
●
Harness for open or short between IPDM E/R and condenser
>> Repair harness or connectors.
9.
CHECK CONDENSER GROUND CIRCUIT
1.
Check harness continuity between condenser terminal 2 and ground.
Refer to Wiring Diagram.
2.
Also check harness for short to power.
OK or NG
OK
>> GO TO 10.
NG
>> Repair open circuit or short to power in harness or connectors.
10.
CHECK CONDENSER
Refer to
EC-628, "Component Inspection"
OK or NG
OK
>> GO TO 11.
NG
>> Replace condenser.
11.
CHECK FUEL PUMP POWER SUPPLY AND GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch “OFF”.
2.
Disconnect “fuel level sensor unit and fuel pump” harness con-
nector.
3.
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.
4.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 12.
NG
>> Repair open circuit or short to power in harness or connectors.
Continuity should exist.
Continuity should exist.
Continuity should exist.
PBIB1357E
EC-628
FUEL PUMP CIRCUIT
Revision; 2004 April
2003 Murano
12.
CHECK FUEL PUMP
Refer to
EC-628, "Component Inspection"
OK or NG
OK
>> GO TO 13.
NG
>> Replace fuel pump.
13.
CHECK INTERMITTENT INCIDENT
Refer to
EC-151, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
OK or NG
OK
>> Replace IPDM E/R.
NG
>> Repair or replace harness or connectors.
Component Inspection
ABS004OO
FUEL PUMP
1.
Disconnect fuel level sensor unit and fuel pump harness connector.
2.
Check resistance between fuel level sensor unit and fuel pump
terminals 1 and 3.
CONDENSER
1.
Turn ignition switch “OFF”.
2.
Disconnect condenser harness connector.
3.
Check resistance between condenser terminals 1 and 2.
Removal and Installation
ABS004OP
FUEL PUMP
Refer to
FL-5, "FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY"
Resistance: 0.2 – 5.0
Ω
[at 25
°
C (77
°
F)]
SEC918C
Resistance
Above 1 M
Ω
at 25
°
C (77
°
F)
PBIB0794E
ELECTRONIC CONTROLLED ENGINE MOUNT
EC-629
C
D
E
F
G
H
I
J
K
L
M
A
EC
Revision; 2004 April
2003 Murano
ELECTRONIC CONTROLLED ENGINE MOUNT
PFP:11270
System Description
ABS004OQ
*: This signal is sent to the ECM through CAN communication line.
The ECM controls the engine mount operation corresponding to the engine speed and the vehicle speed. The
control system has 2-step control [Soft/Hard]
CONSULT-II Reference Value in Data Monitor Mode
ABS004VS
Specification data are reference values.
Sensor
Input Signal to ECM
ECM function
Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)
Engine speed
Engine mount
control
Electronic controlled engine
mount
Vehicle speed sensor
Vehicle speed*
Vehicle condition
Engine mount control
Idle (with vehicle stopped)
Soft
Except above conditions
Hard
MONITOR ITEM
CONDITION
SPECIFICATION
ENGINE MOUNT
●
Engine: After warming up
Idle (with vehicle stopped)
IDLE
Except above conditions
TRVL
EC-630
ELECTRONIC CONTROLLED ENGINE MOUNT
Revision; 2004 April
2003 Murano
Wiring Diagram
ABS004OS
TBWA0396E
ELECTRONIC CONTROLLED ENGINE MOUNT
EC-631
C
D
E
F
G
H
I
J
K
L
M
A
EC
Revision; 2004 April
2003 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
ABS004OT
1.
INSPECTION START
Do you have CONSULT-II?
Yes or No
Yes
>> GO TO 2.
No
>> GO TO 3.
2.
CHECK OVERALL FUNCTION
With CONSULT-II
1.
Turn ignition switch ON.
2.
Select “ENGINE MOUNTING” in “ACTIVE TEST” mode with
CONSULT-II and touch “ON/OFF” on the CONSULT-II screen.
3.
Check that the motor operating sound is heard from front elec-
tronic controlled engine mount for about 0.5 seconds according
to the switching condition of “ENGINE MOUNTING”.
OK or NG
OK
>> INSPECTION END
NG >> GO
TO
4.
3.
CHECK OVERALL FUNCTION
Without CONSULT-II
1.
Make sure that gear position is “P” or “N”.
2.
Start engine and let it idle.
3.
Change the engine speed from idle to more than 1,000 rpm and then return to idle (with vehicle stopped).
4.
Check that the motor operating sound is heard from front electronic controlled engine mount for about 0.5
seconds when changing engine speed.
It is better to hear the operating sound around the left side front wheel house.
OK or NG
OK
>> INSPECTION END
NG >> GO
TO
4.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
44
BR/W
Electronic controlled engine
mount-1
[Engine is running]
●
Idle speed
0 - 3.0V
[Engine is running]
●
Except the above
BATTERY VOLTAGE
(11 - 14V)
63
W/R
Electronic controlled engine
mount-2
[Engine is running]
●
Idle speed
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●
Except the above
0 - 3.0V
SEC237C
EC-632
ELECTRONIC CONTROLLED ENGINE MOUNT
Revision; 2004 April
2003 Murano
4.
CHECK ELECTRONIC CONTROLLED ENGINE MOUNT POWER SUPPLY CIRCUIT
1.
Turn ignition switch “OFF”.
2.
Disconnect front or rear electronic controlled engine mount harness connector.
3.
Check voltage between electronic controlled engine mount ter-
minal 3 and ground with CONSULT-II or tester.
OK or NG
OK
>> GO TO 6.
NG
>> GO TO 5.
5.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors M82, F102
●
10A fuse
●
Harness for open and short between electronic controlled engine mount and battery
>> Repair harness or connectors.
6.
CHECK ELECTRONIC CONTROLLED ENGINE MOUNT OUTPUT SIGNAL CIRCUIT FOR OPEN AND
SHORT
1.
Turn ignition switch “OFF”.
2.
Disconnect ECM harness connector.
3.
Check harness continuity between ECM terminals and electronic engine mount terminals as follows.
Refer to Wiring Diagram.
4.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 7.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
PBIB1373E
Voltage: Battery voltage
SEC920C
ECM terminal
Front electronic controlled engine mount
terminal
Rear electronic controlled engine mount
terminal (AWD models)
44
1
1
63
2
2
Continuity should exist.
ELECTRONIC CONTROLLED ENGINE MOUNT
EC-633
C
D
E
F
G
H
I
J
K
L
M
A
EC
Revision; 2004 April
2003 Murano
7.
CHECK ELECTRONIC CONTROLLED ENGINE MOUNT
Visually check front and rear electronic controlled engine mount.
OK or NG
OK
>> GO TO 8.
NG
>> Replace front or rear electronic controlled engine mount.
8.
CHECK INTERMITTENT INCIDENT
Refer to
EC-151, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END
EC-634
REFRIGERANT PRESSURE SENSOR
Revision; 2004 April
2003 Murano
REFRIGERANT PRESSURE SENSOR
PFP:92136
Component Description
ABS004OU
The refrigerant pressure sensor is installed at the liquid tank of the
air conditioner system. The sensor uses an electrostatic volume
pressure transducer to convert refrigerant pressure to voltage. The
voltage signal is sent to ECM, and ECM controls cooling fan system.
PBIB1372E
SEF099XA
REFRIGERANT PRESSURE SENSOR
EC-635
C
D
E
F
G
H
I
J
K
L
M
A
EC
Revision; 2004 April
2003 Murano
Wiring Diagram
ABS004OV
TBWA0392E
EC-636
REFRIGERANT PRESSURE SENSOR
Revision; 2004 April
2003 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
ABS004OW
1.
CHECK REFRIGERANT PRESSURE SENSOR OVERALL FUNCTION
1.
Start engine and warm it up to normal operating temperature.
2.
Turn A/C switch and blower switch “ON”.
3.
Check voltage between ECM terminal 70 and ground with CON-
SULT-II or tester.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 2.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
49
R/W
Sensors' power supply
(Refrigerant pressure sen-
sor)
[Ignition switch “ON”]
Approximately 5V
67
B
Sensors' ground
(MAF sensor / IAT sensor /
PSP sensor / EVAP control
system pressure sensor /
ASCD steering switch /
Refrigerant pressure sen-
sor)
[Engine is running]
●
Warm-up condition
●
Idle speed
Approximately 0V
70
W
Refrigerant pressure sensor
[Engine is running]
●
Warm-up condition
●
Both A/C switch and blower switch are “ON”.
(Compressor operates.)
1.0 - 4.0V
Voltage: 1.0 - 4.0V
PBIB1188E
REFRIGERANT PRESSURE SENSOR
EC-637
C
D
E
F
G
H
I
J
K
L
M
A
EC
Revision; 2004 April
2003 Murano
2.
CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
1.
Turn A/C switch and blower switch “OFF”.
2.
Stop engine.
3.
Disconnect refrigerant pressure sensor harness connector.
4.
Turn ignition switch “ON”.
5.
Check voltage between refrigerant pressure sensor terminal 1
and ground with CONSULT-II or tester.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 3.
3.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors E19, F3
●
Harness for open or short between ECM and refrigerant pressure sensor
>> Repair harness or connectors.
4.
CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch “OFF”.
2.
Disconnect ECM harness connector.
3.
Check harness continuity between refrigerant pressure sensor terminal 3 and ECM terminal 67.
Refer to Wiring Diagram.
4.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 6.
NG
>> GO TO 5.
PBIB1372E
Voltage: Approximately 5V
PBIB0188E
Continuity should exist.
EC-638
REFRIGERANT PRESSURE SENSOR
Revision; 2004 April
2003 Murano
5.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors E19, F3
●
Joint connector-3
●
Harness for open or short between ECM and refrigerant pressure sensor
>> Repair open circuit or short to ground or short to power in harness or connectors.
6.
CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Check harness continuity between ECM terminal 70 and refrigerant pressure sensor terminal 2.
Refer to Wiring Diagram.
2.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 8.
NG
>> GO TO 7.
7.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors E19, F3
●
Harness for open or short between ECM and refrigerant pressure sensor
>> Repair open circuit or short to ground or short to power in harness or connectors.
8.
CHECK INTERMITTENT INCIDENT
Refer to
EC-151, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
OK or NG
OK
>> Replace refrigerant pressure sensor.
NG
>> Repair or replace.
Removal and Installation
ABS004OX
REFRIGERANT PRESSURE SENSOR
Refer to
ATC-164, "Removal and Installation of Refrigerant Pressure Sensor"
Continuity should exist.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст