Nissan Sentra. Instruction — part 440
EC-456
< DTC/CIRCUIT DIAGNOSIS >
[MRA8DE]
IGNITION SIGNAL
IGNITION SIGNAL
Component Function Check
INFOID:0000000009758714
1.
INSPECTION START
1. Turn ignition switch OFF.
2. Start engine.
Does the engine start?
YES
>> GO TO 2.
NO
>> Proceed to
.
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
.
Diagnosis Procedure
INFOID:0000000009758715
1.
CHECK FUSE
1. Turn ignition switch OFF.
2. Pull out #51 fuse and check that the fuse is not fusing.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace the fuse after repairing the applicable circuit.
2.
CHECK IGNITION COIL POWER SUPPLY
1. Insert the fuse which pulled out.
2. Disconnect ignition coil harness connector.
3. Turn ignition switch ON.
4. Check the voltage between ignition coil harness connector and ground.
ECM
Voltage signal
+
−
Connector
Terminal
Connector
Terminal
F25
86
E16
128
87
90
91
JPBIA4733ZZ
IGNITION SIGNAL
EC-457
< DTC/CIRCUIT DIAGNOSIS >
[MRA8DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 3.
3.
CHECK IGNITION COIL 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 ignition coil harness connector.
4. Also check harness for short to ground.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-39, "Intermittent Incident"
.
NO
>> Repair or replace error-detected parts.
4.
CHECK IGNITION COIL GROUND CIRCUIT
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 5.
NO
>> Repair or replace error-detected parts.
5.
CHECK IGNITION COIL OUTPUT SIGNAL CIRCUIT
1. Disconnect ECM harness connector.
2. Check the continuity between ECM harness connector and ignition coil harness connector.
+
−
Voltage
Ignition coil
Cylinder
Connector
Terminal
1
F34
3
Ground
Battery voltage
2
F35
3
3
F36
3
4
F37
3
+
−
Continuity
IPDM E/R
Ignition coil
Connector
Terminal
Cylinder
Connector
Terminal
E43
17
1
F34
3
Existed
2
F35
3
3
F36
3
4
F37
3
+
−
Continuity
Ignition coil
Cylinder
Connector
Terminal
1
F34
2
Ground
Existed
2
F35
2
3
F36
2
4
F37
2
EC-458
< DTC/CIRCUIT DIAGNOSIS >
[MRA8DE]
IGNITION SIGNAL
3. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace error-detected parts.
6.
CHECK IGNITION COIL WITH POWER TRANSISTOR
Check ignition coil with power transistor. Refer to
EC-459, "Component Inspection (Ignition Coil with Power
.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Replace malfunctioning ignition coil with power transistor. Refer to
7.
CHECK CONDENSER CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect condenser.
3. Disconnect IPDM E/R harness connector.
4. Check the continuity between IPDM E/R harness connector and condenser harness connector.
5. Also check harness for short to ground.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Repair or replace error-detected parts.
8.
CHECK CONDENSER GROUND CIRCUIT
1. Check the continuity between Condenser harness connector and ground.
2. Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Repair or replace error-detected parts.
9.
CHECK CONDENSER
Check condenser. Refer to
EC-459, "Component Inspection (Condenser)"
.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace condenser.
+
−
Continuity
Ignition coil
ECM
Cylinder
Connector
Terminal
Connector
Terminal
1
F34
1
F25
86
Existed
2
F35
1
87
3
F36
1
90
4
F37
1
91
+
−
Continuity
IPDM E/R
Condenser
Connector
Terminal
Connector
Terminal
E43
17
F4
1
Existed
+
−
Continuity
Condenser
Connector
Terminal
F4
2
Ground
Existed
IGNITION SIGNAL
EC-459
< DTC/CIRCUIT DIAGNOSIS >
[MRA8DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
Component Inspection (Condenser)
INFOID:0000000009758716
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.
Component Inspection (Ignition Coil with Power Transistor)
INFOID:0000000009758717
1.
CHECK IGNITION COIL WITH POWER TRANSISTOR-1
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-2
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.
Condenser
Condition
Resistance
+
−
Terminal
1
2
Temperature
°C (°F)
25 (77)
Above 1 M
Ω
Ignition coil with power tran-
sistor
Condition
Resistance
+
−
Terminal
1
2
Temperature
°C (°F)
25 (77)
Except 0 or
∞ Ω
3
Except 0
Ω
2
3
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст