Nissan Altima L32. Instruction — part 461
IGNITION SIGNAL
EC-965
< COMPONENT DIAGNOSIS >
[QR25DE EXCEPT FOR CALIFORNIA]
C
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EC
N
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YES
>> GO TO 6.
NO
>> Replace condenser.
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 open circuit or short to ground or short to power in 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 ground 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 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 9.
NO
>> Repair open circuit or short to ground or short to power in harness or connectors.
9.
CHECK IGNITION COIL WITH POWER TRANSISTOR
EC-966, "Component Inspection (Ignition Coil with Power Transistor)"
.
Ignition coil
Ground
Voltage
Cylinder
Connector
Terminal
1
F34
3
Ground
Battery voltage
2
F35
3
3
F36
3
4
F37
3
PBIB0138E
Ignition coil
Ground
Continuity
Cylinder
Connector
Terminal
1
F34
2
Ground
Existed
2
F35
2
3
F36
2
4
F37
2
Ignition coil
ECM
Continuity
Cylinder
Connector
Terminal
Connector
Terminal
1
F34
1
F14
11
Existed
2
F35
1
10
3
F36
1
9
4
F37
1
21
EC-966
< COMPONENT DIAGNOSIS >
[QR25DE EXCEPT FOR CALIFORNIA]
IGNITION SIGNAL
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Replace malfunctioning ignition coil with power transistor.
10.
CHECK INTERMITTENT INCIDENT
GI-42, "Intermittent Incident"
>> INSPECTION END
Component Inspection (Ignition Coil with Power Transistor)
INFOID:0000000004349960
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 follows.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace malfunctioning ignition coil with power transis-
tor.
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-III to release fuel pressure, or fuel pressure applies again during the following pro-
cedure.
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.
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 about three seconds, and check whether spark
is generated between the spark plug and the grounded metal
portion.
CAUTION:
• Do not approach to the spark plug and the ignition coil
within 50 cm (19.7 in). Be careful not to get an electrical
shock while checking, because the electrical discharge
voltage becomes 20kV or more.
• It might cause to damage the ignition coil if the gap of more than 17 mm (0.66 in) is taken.
NOTE:
Terminals
Resistance
Ω [at 25°C (77°F)]
1 and 2
Except 0 or
∞
1 and 3
Except 0
2 and 3
PBIB0847E
Spark should be generated.
JMBIA0066GB
IGNITION SIGNAL
EC-967
< COMPONENT DIAGNOSIS >
[QR25DE EXCEPT FOR CALIFORNIA]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
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.
Component Inspection (Condenser-2)
INFOID:0000000004349961
1.
CHECK CONDENSER-2
1. Turn ignition switch OFF.
2. Disconnect condenser-2 harness connector.
3. Check resistance between condenser-2 terminals as follows.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace condenser-2.
Terminals
Resistance
1 and 2
Above 1 M
Ω [at 25°C (77°F)]
PBIB0794E
EC-968
< COMPONENT DIAGNOSIS >
[QR25DE EXCEPT FOR CALIFORNIA]
MALFUNCTION INDICATOR LAMP
MALFUNCTION INDICATOR LAMP
Description
INFOID:0000000004349962
The Malfunction Indicator Lamp (MIL) is located on the combination
meter.
The MIL will light up when the ignition switch is turned ON without
the engine running. This is a bulb check.
When the engine is started, the MIL should go off. If the MIL remains
on, the on board diagnostic system has detected an engine system
malfunction.
For details, refer to
Component Function Check
INFOID:0000000004349963
1.
CHECK MIL FUNCTION
1. Turn ignition switch ON.
2. Make sure that MIL lights up.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Diagnosis Procedure
INFOID:0000000004349964
1.
CHECK DTC
Check that DTC UXXXX is not displayed.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Perform trouble diagnosis for DTC UXXXX.
2.
CHECK DTC WITH METER
MWI-38, "CONSULT-III Function (METER/M&A)"
.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace.
3.
CHECK INTERMITTENT INCIDENT
GI-42, "Intermittent Incident"
Is the inspection result normal?
YES
>> Replace combination meter.
NO
>> Repair or replace.
SEF217U
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