Nissan Murano. Instruction — part 586
EC-454
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
IGNITION SIGNAL
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Refer to
.
2.
CHECK IGNITION COIL POWER SUPPLY CIRCUIT-II
1.
Turn ignition switch OFF.
2.
Disconnect condenser harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between condenser harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 3.
3.
CHECK IGNITION COIL POWER SUPPLY CIRCUIT-III
1.
Turn ignition switch OFF.
2.
Disconnect IPDM E/R harness connector.
3.
Check the continuity between IPDM E/R harness connector and condenser harness connector.
4.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> Refer to
.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
4.
CHECK CONDENSER GROUND CIRCUIT FOR OPEN AND SHORT
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 5.
NO
>> Repair open circuit or short to power in harness or connectors.
5.
CHECK CONDENSER
EC-457, "Component Inspection (Condenser)"
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace condenser.
ECM
Voltage
Connector
+
–
Terminal
Terminal
E16
105
112
Battery voltage
Condenser
Ground
Voltage
Connector
Terminal
F13
1
Ground
Battery voltage
IPDM E/R
Condenser
Continuity
Connector
Terminal
Connector
Terminal
F12
49
F13
1
Existed
Condenser
Ground
Continuity
Connector
Terminal
F13
2
Ground
Existed
IGNITION SIGNAL
EC-455
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
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6.
CHECK IGNITION COIL POWER SUPPLY CIRCUIT-V
1.
Reconnect all harness connectors disconnected.
2.
Disconnect ignition coil harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between ignition coil harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair or replace harness or connectors.
7.
CHECK IGNITION COIL GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Check the continuity between ignition coil harness connector and ground.
3.
Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Repair open circuit or short to power in harness or connectors.
8.
CHECK IGNITION COIL OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Disconnect ECM harness connector.
2.
Check the continuity between ignition coil harness connector and ECM harness connector.
3.
Also check harness for short to ground and short to power.
Is the inspection result normal?
Ignition coil
Ground
Voltage
Cylinder
Connector
Terminal
1
F31
3
Ground
Battery voltage
2
F32
3
3
F33
3
4
F34
3
5
F35
3
6
F36
3
Ignition coil
Ground
Continuity
Cylinder
Connector
Terminal
1
F31
2
Ground
Existed
2
F32
2
3
F33
2
4
F34
2
5
F35
2
6
F36
2
Ignition coil
ECM
Continuity
Cylinder
Connector
Terminal
Connector
Terminal
1
F31
1
F7
11
Existed
2
F32
1
10
3
F33
1
9
4
F34
1
21
5
F35
1
19
6
F36
1
18
EC-456
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
IGNITION SIGNAL
YES
>> GO TO 9.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
9.
CHECK IGNITION COIL WITH POWER TRANSISTOR
EC-456, "Component Inspection (Ignition Coil with Power Transistor)"
.
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Replace malfunctioning ignition coil with power transistor. Refer to
10.
CHECK INTERMITTENT INCIDENT
GI-44, "Intermittent Incident"
>> INSPECTION END
Component Inspection (Ignition Coil with Power Transistor)
INFOID:0000000009720223
1.
CHECK IGNITION COIL WITH POWER TRANSISTOR-I
1.
Turn ignition switch OFF.
2.
Disconnect ignition coil harness connector.
3.
Check resistance between ignition coil terminals as per the following.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace malfunctioning ignition coil with power transistor. Refer to
2.
CHECK IGNITION COIL WITH POWER TRANSISTOR-II
CAUTION:
Perform the following procedure in a place with no combustible objects and good ventilation.
1.
Turn ignition switch OFF.
2.
Reconnect all harness connectors disconnected.
3.
Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE:
Do not use CONSULT to release fuel pressure, or fuel pressure applies again during the following proce-
dure.
4.
Start engine.
5.
After engine stalls, crank it 2 or 3 times to release all fuel pressure.
6.
Turn ignition switch OFF.
7.
Remove all ignition coil harness connectors to avoid the electrical discharge from the ignition coils.
8.
Remove ignition coil and spark plug of the cylinder to be checked.
9.
Crank engine for 5 seconds or more to remove combustion gas in the cylinder.
10. Connect spark plug and harness connector to ignition coil.
11. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 -
0.66 in) between the edge of the spark plug and grounded metal
portion as shown in the figure.
12. Crank engine for approximately 3 seconds, and check whether
spark is generated between the spark plug and the grounded
metal portion.
CAUTION:
• During the operation, always stay 0.5 m (19.7 in) or more
away from the spark plug and the ignition coil. Be careful
Terminal No. (Polarity)
Resistance
Ω
[at 25
°
C (77
°
F)]
1 and 2
Except 0 or
∞
1 and 3
Except 0
2 and 3
Spark should be generated.
JMBIA0066GB
IGNITION SIGNAL
EC-457
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
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not to get an electrical shock while checking, because the electrical discharge voltage becomes
20 kV or more.
• It might cause to damage the ignition coil if the gap of more than 17 mm (0.66 in) is taken.
NOTE:
When the gap is less than 13 mm (0.52 in), the spark might be generated even if the coil is mal-
functioning.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace malfunctioning ignition coil with power transistor. Refer to
Component Inspection (Condenser)
INFOID:0000000009720224
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.
Terminals
Resistance
1 and 2
Above 1 M
Ω
[at 25C
°
(77C
°
)]
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