Nissan Juke F15. Instruction — part 604
IGNITION SIGNAL
EC-1229
< DTC/CIRCUIT DIAGNOSIS >
[MR EXCEPT FOR NISMO RS MODELS]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
IGNITION SIGNAL
Component Function Check
INFOID:0000000012198757
1.
INSPECTION START
Turn ignition switch OFF, and restart engine.
Does the engine start?
YES
>> GO TO 2.
NO
>> Proceed to
EC-1229, "Diagnosis Procedure"
.
2.
IGNITION SIGNAL FUNCTION
With CONSULT
1. Perform “POWER BALANCE” in “ACTIVE TEST” mode of “ENGINE” using CONSULT.
2. Check that each circuit produces a momentary engine speed drop.
Without CONSULT
1. Let engine idle.
2. Check the voltage signal between ECM harness connector and ground with an oscilloscope.
NOTE:
The pulse cycle changes depending on rpm at idle.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
EC-1229, "Diagnosis Procedure"
.
Diagnosis Procedure
INFOID:0000000012198758
1.
CHECK CONDENSER POWER SUPPLY
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 3.
NO
>> GO TO 2.
2.
CHECK CONDENSER POWER SUPPLY CIRCUIT
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.
ECM
Voltage signal
+
−
Connector
Terminal
Connector
Terminal
F24
96
E19
152
95
104
101
JPBIA4733ZZ
+
−
Voltage
Condenser
Connector
Terminal
F13
1
Ground
Battery voltage
EC-1230
< DTC/CIRCUIT DIAGNOSIS >
[MR EXCEPT FOR NISMO RS MODELS]
IGNITION SIGNAL
4. Also check harness for short to ground.
Is the inspection result normal?
YES
>> Perform the trouble diagnosis for power supply circuit.
NO
>> Repair or replace error-detected parts.
3.
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 4.
NO
>> Repair or replace error-detected parts.
4.
CHECK CONDENSER
Check the condenser. refer to
EC-1232, "Component Inspection (Condenser)"
.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace condenser.
5.
CHECK IGNITION COIL POWER SUPPLY
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 6.
NO
>> Perform the trouble diagnosis for power supply circuit.
6.
CHECK IGNITION COIL GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check the continuity between ignition coil harness connector and ground.
+
−
Continuity
IPDM E/R
Condenser
Connector
Terminal
Connector
Terminal
E15
61
F13
1
Existed
+
−
Continuity
Condenser
Connector
Terminal
F13
2
Ground
Existed
+
−
Voltage
Ignition coil
Cylinder
Connector
Terminal
1
F33
3
Ground
Battery voltage
2
F34
3
3
F35
3
4
F36
3
IGNITION SIGNAL
EC-1231
< DTC/CIRCUIT DIAGNOSIS >
[MR EXCEPT FOR NISMO RS MODELS]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
3. Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair or replace error-detected parts.
7.
CHECK IGNITION COIL OUTPUT SIGNAL CIRCUIT
1. Disconnect ECM harness connector.
2. Check the continuity between ECM harness connector and ignition coil harness connector.
3. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Repair or replace error-detected parts.
8.
CHECK IGNITION COIL WITH POWER TRANSISTOR
Check the ignition coil with power transistor. Refer to
EC-1231, "Component Inspection (Ignition Coil with
.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-45, "Intermittent Incident"
.
NO
>> Replace malfunctioning ignition coil with power transistor. Refer to
.
Component Inspection (Ignition Coil with Power Transistor)
INFOID:0000000012198759
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.
+
−
Continuity
Ignition coil
Cylinder
Connector
Terminal
1
F33
2
Ground
Existed
2
F34
2
3
F35
2
4
F36
2
+
−
Continuity
Ignition coil
ECM
Cylinder
Connector
Terminal
Connector
Terminal
1
F33
1
F24
96
Existed
2
F34
1
95
3
F35
1
104
4
F36
1
101
Ignition coil with power transistor
Resistance [
Ω at 25°C (77°F)]
+
−
Terminal
1
2
Except 0 or
∞
3
Except 0
2
3
EC-1232
< DTC/CIRCUIT DIAGNOSIS >
[MR EXCEPT FOR NISMO RS MODELS]
IGNITION SIGNAL
NO
>> Replace malfunctioning ignition coil with power transistor. Refer to
.
2.
CHECK IGNITION COIL WITH POWER TRANSISTOR-II
CAUTION:
Do the following procedure in the place where ventilation is good without the combustible.
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 two or three 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. Refer
8. Remove ignition coil and spark plug of the cylinder to be checked. Refer to
.
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 about three seconds, and check whether spark
is generated between the spark plug and the grounded metal
portion.
CAUTION:
• During the operation, always stay 0.5 cm (19.7 in) away
from the spark plug and the ignition coil. Be careful not to
get an electrical shock while checking, because the elec-
trical 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:0000000012198760
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.
Spark should be generated.
JMBIA0066GB
Condenser
Resistance
+
−
Terminal
1
2
Above 1 M
Ω [at 25°C (77°F)]
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