Nissan Murano. Instruction — part 585
EC-450
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
FUEL PUMP
2.
CHECK FUEL PUMP POWER SUPPLY CIRCUIT-II
Check the voltage between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 16.
3.
DETECT MALFUNCTIONING PART
Check the following.
• IPDM E/R harness connector F12
• Harness for open or short between IPDM E/R and ECM
>> Repair open circuit, short to ground or short to power in harness or connectors.
4.
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 the voltage between condenser harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> GO TO 5.
5.
CHECK 15 A FUSE
1.
Turn ignition switch OFF.
2.
Disconnect 15 A fuse (No. 41).
3.
Check 15 A fuse.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace fuse.
6.
CHECK CONDENSER POWER SUPPLY CIRCUIT-II
1.
Disconnect IPDM E/R harness connector.
2.
Check the continuity between IPDM E/R harness connector and condenser harness connector.
3.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 16.
NO
>> GO TO 7.
7.
DETECT MALFUNCTIONING PART
IPDM E/R
Ground
Voltage
Connector
Terminal
F12
77
Ground
Battery voltage
Condenser
Ground
Voltage
Connector
Terminal
B81
1
Ground
Battery voltage should exist for 1 second
after ignition switch is turned ON.
IPDM E/R
Condenser
Continuity
Connector
Terminal
Connector
Terminal
E10
13
B81
1
Existed
FUEL PUMP
EC-451
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
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EC
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Check the following.
• Harness connectors E104, B4
• IPDM E/R connector E10
• Harness for open or short between IPDM E/R and condenser
>> Repair open circuit or short to power in harness or connectors.
8.
CHECK CONDENSER GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Check the continuity between condenser harness connector and ground.
3.
Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> GO TO 9.
9.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors B4, E104 (with rear view monitor)
• Harness for open or short between condenser and ground
>> Repair open circuit or short to power in harness or connectors.
10.
CHECK CONDENSER
EC-452, "Component Inspection (Condenser)"
.
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> Replace condenser.
11.
CHECK FUEL PUMP POWER SUPPLY CIRCUIT-III
1.
Disconnect “fuel level sensor unit and fuel pump” harness connector.
2.
Check harness continuity between IPDM E/R harness connector and “fuel level sensor unit and fuel
pump” harness connector.
Is the inspection result normal?
YES
>> GO TO 13.
NO
>> GO TO 12.
12.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors B4, E104
• Harness for open or short between “fuel level sensor unit and fuel pump” and IPDM E/R
>> Repair open circuit or short to power in harness or connectors.
13.
CHECK FUEL PUMP GROUND CIRCUIT
1.
Disconnect “fuel level sensor unit and fuel pump” harness connector.
2.
Check the continuity between “fuel level sensor unit and fuel pump” harness connector and ground.
Condenser
Ground
Continuity
Connector
Terminal
B81
2
Ground
Existed
IPDM E/R
Fuel level sensor unit and fuel
pump
Continuity
Connector
Terminal
Connector
Terminal
E10
13
B40
1
Existed
EC-452
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
FUEL PUMP
Is the inspection result normal?
YES
>> GO TO 15.
NO
>> GO TO 14.
14.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors B4, E104 (with rear view monitor)
• Harness for open or short between “fuel level sensor unit and fuel pump” and ground
>> Repair open circuit or short to power in harness or connectors.
15.
CHECK FUEL PUMP
EC-452, "Component Inspection (Fuel Pump)"
.
Is the inspection result normal?
YES
>> GO TO 16.
NO
>> Replace fuel pump. Refer to
16.
CHECK INTERMITTENT INCIDENT
GI-44, "Intermittent Incident"
Is the inspection result normal?
YES
>> Replace IPDM E/R. Refer to
.
NO
>> Repair or replace harness or connectors.
Component Inspection (Fuel Pump)
INFOID:0000000009720218
1.
CHECK FUEL PUMP
1.
Turn ignition switch OFF.
2.
Disconnect “fuel level sensor unit and fuel pump” harness connector.
3.
Check resistance between “fuel level sensor unit and fuel pump” terminals as per the following.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace “fuel level sensor unit and fuel pump”. Refer to
.
Component Inspection (Condenser)
INFOID:0000000009720219
1.
CHECK CONDENSER
1.
Turn ignition switch OFF.
2.
Disconnect condenser harness connector.
3.
Check resistance between condenser terminals as per the following.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace condenser.
Fuel level sensor unit and fuel
pump
Ground
Continuity
Connector
Terminal
B40
3
Ground
Existed
Terminals
Resistance
1 and 3
0.2 - 5.0
Ω
[at 25
°
C (77
°
F)]
Terminals
Resistance
1 and 2
Above 1 M
Ω
[at 25
°
C (77
°
F)]
IGNITION SIGNAL
EC-453
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
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IGNITION SIGNAL
Description
INFOID:0000000009720220
The ignition signal from the ECM is sent to and amplified by the power transistor. The power transistor turns
ON and OFF the ignition coil primary circuit. This ON/OFF operation induces the proper high voltage in the coil
secondary circuit.
Component Function Check
INFOID:0000000009720221
1.
INSPECTION START
Turn ignition switch OFF, and restart engine.
Does the engine start?
YES-1 >> With CONSULT: GO TO 2.
YES-2 >> Without CONSULT: GO TO 3.
NO
>> Go to
2.
CHECK IGNITION SIGNAL FUNCTION
With CONSULT
1.
Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT.
2.
Check that each circuit produces a momentary engine speed drop.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
3.
CHECK IGNITION SIGNAL FUNCTION
Without CONSULT
1.
Let engine idle.
2.
Read the voltage signal between ECM harness connector terminals with an oscilloscope.
NOTE:
The pulse cycle changes depending on rpm at idle.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Diagnosis Procedure
INFOID:0000000009720222
1.
CHECK IGNITION COIL POWER SUPPLY CIRCUIT-I
1.
Turn ignition switch OFF, wait at least 10 seconds and then turn it ON.
2.
Check the voltage between ECM harness connector terminals.
ECM
Voltage signal
+
–
Connector
Terminal
Connector
Terminal
F7
9
E16
112
10
11
18
19
21
JMBIA0035GB
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