Nissan Pathfinder (2012 year). Instruction — part 291
FUEL PUMP
EC-409
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
Component Inspection
INFOID:0000000007358374
FUEL PUMP
1. Disconnect “fuel level sensor unit and fuel pump” harness connector.
2. Check resistance between “fuel level sensor unit and fuel pump”
terminals 1 and 3.
Resistance: Approximately 0.2 - 5.0
Ω
[at 25
°
C (77
°
F)]
SEC918C
August 2012
2012 Pathfinder
EC-410
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
IGNITION SIGNAL
IGNITION SIGNAL
Component Description
INFOID:0000000007358375
IGNITION COIL & POWER TRANSISTOR
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.
Diagnosis Procedure
INFOID:0000000007358376
1.
CHECK ENGINE START
Turn ignition switch OFF, and restart engine.
Is engine running?
Yes or No
Yes (With CONSULT)>>GO TO 2.
Yes (Without CONSULT)>>GO TO 3.
No
>> GO TO 4.
2.
CHECK OVERALL FUNCTION
With CONSULT
1. Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT.
2. Make sure that each circuit produces a momentary engine speed drop.
OK or NG
OK
>>
INSPECTION END
NG
>> GO TO 10.
3.
CHECK OVERALL FUNCTION
Without CONSULT
1. Let engine idle.
2. Read the voltage signal between ECM terminals 60, 61, 62, 79,
80, 81 and ground with an oscilloscope.
3. Verify that the oscilloscope screen shows the signal wave as
shown below.
NOTE:
The pulse cycle changes depending on rpm at idle.
OK or NG
OK
>>
INSPECTION END
NG
>> GO TO 10.
4.
CHECK IGNITION COIL POWER SUPPLY CIRCUIT-I
BBIA0561E
PBIB1186E
SEC986C
August 2012
2012 Pathfinder
IGNITION SIGNAL
EC-411
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
1. Turn ignition switch OFF, wait at least 10 seconds and then turn it ON.
2. Check voltage between ECM terminals 119, 120 and ground
with CONSULT or tester.
OK or NG
OK
>> GO TO 5.
NG
>> Go to
.
5.
CHECK IGNITION COIL POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect condenser-1 harness connector.
3. Turn ignition switch ON.
4. Check voltage between condenser-1 terminal 1 and ground with
CONSULT or tester.
OK or NG
OK
>> GO TO 8.
NG
>> GO TO 6.
6.
CHECK IGNITION COIL POWER SUPPLY CIRCUIT-III
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector E119.
3. Check harness continuity between IPDM E/R terminal 3 and condenser-1 terminal 1.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 17.
NG
>> GO TO 7.
7.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E2, F32
• Harness for open or short between condenser-1 and IPDM E/R
>> Repair open circuit or short to ground or short to power in harness or connectors.
Voltage: Battery voltage
MBIB0034E
BBIA0562E
Voltage: Battery voltage
PBIB0624E
Continuity should exist.
August 2012
2012 Pathfinder
EC-412
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
IGNITION SIGNAL
8.
CHECK CONDENSER-1 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Check harness continuity between condenser-1 terminal 2 and ground.
Refer to Wiring Diagram.
3. Also check harness for short to power.
OK or NG
OK
>> GO TO 9.
NG
>> Repair open circuit or short to power in harness or connectors.
9.
CHECK CONDENSER-1
EC-413, "Component Inspection"
OK or NG
OK
>> GO TO 10.
NG
>> Replace condenser-1.
10.
CHECK IGNITION COIL POWER SUPPLY CIRCUIT-V
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Disconnect ignition coil harness connector.
4. Turn ignition switch ON.
5. Check voltage between ignition coil terminal 3 and ground with
CONSULT or tester.
OK or NG
OK
>> GO TO 12.
NG
>> GO TO 11.
11.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors F26, F225
• Harness for open or short between ignition coil and harness connector F32
>> Repair or replace harness or connectors.
12.
CHECK IGNITION COIL GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Check harness continuity between ignition coil terminal 2 and ground.
Refer to Wiring Diagram.
Continuity should exist.
Voltage: Battery voltage
BBIA0561E
PBIB0138E
Continuity should exist.
August 2012
2012 Pathfinder
IGNITION SIGNAL
EC-413
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
3. Also check harness for short to power.
OK or NG
OK
>> GO TO 14.
NG
>> GO TO 13.
13.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors F225, F26
• Harness for open or short between ignition coil and ground
>> Repair open circuit or short to power in harness or connectors.
14.
CHECK IGNITION COIL OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminals 60, 61, 62, 79, 80, 81 and ignition coil terminal 1.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 16.
NG
>> GO TO 15.
15.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors F26, F225
• Harness for open or short between ignition coil and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
16.
CHECK IGNITION COIL WITH POWER TRANSISTOR
EC-413, "Component Inspection"
OK or NG
OK
>> GO TO 17.
NG
>> Replace malfunctioning ignition coil with power transistor. Refer to
.
17.
CHECK INTERMITTENT INCIDENT
GI-37, "Intermittent Incident"
.
>>
INSPECTION END
Component Inspection
INFOID:0000000007358377
IGNITION COIL WITH POWER TRANSISTOR
CAUTION:
Do the following procedure in the place where ventilation is good without the combustible.
1. Turn ignition switch OFF.
2. Disconnect ignition coil harness connector.
Continuity should exist.
August 2012
2012 Pathfinder
EC-414
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
IGNITION SIGNAL
3. Check resistance between ignition coil terminals as follows.
4. If NG, Replace ignition coil with power transistor. Refer to
42, "Removal and Installation"
.
If OK, go to next step.
5. Turn ignition switch OFF.
6. Reconnect all harness connectors disconnected.
7. Remove fuel pump fuse (No.48) 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 procedure.
8. Start engine.
9. After engine stalls, crank it two or three times to release all fuel
pressure.
10. Turn ignition switch OFF.
11. Remove ignition coil harness connectors to avoid the electrical
discharge from the ignition coils.
12. Remove ignition coil and spark plug of the cylinder to be
checked. Refer to
EM-42, "Removal and Installation"
.
13. Crank engine for five seconds or more to remove combustion gas in the cylinder.
14. Connect spark plug and harness connector to ignition coil.
15. 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.
16. Crank engine for about three seconds, and check whether spark
is generated between the spark plug and the grounded part.
CAUTION:
• Never place to the spark plug and the ignition coil within
50cm (19.7 in) each other. Be careful not to get an electri-
cal shock while checking, because the electrical dis-
charge 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 made.
NOTE:
When the gap is less than 13 mm (0.52 in), the spark might be generated even if the coil is mal-
functioning.
17. If NG, Replace ignition coil with power transistor. Refer to
EM-42, "Removal and Installation"
.
CONDENSER-1
1. Turn ignition switch OFF.
2. Disconnect condenser-1 harness connector. For the condenser number, refer to
. For the condenser layout, refer to
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.
PBIB0847E
BBIA0534E
JMBIA0066GB
August 2012
2012 Pathfinder
IGNITION SIGNAL
EC-415
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
3. Check resistance between condenser-1 terminals 1 and 2.
Resistance
Above 1 M
Ω
at 25
°
C (77
°
F)
PBIB0794E
August 2012
2012 Pathfinder
EC-416
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
ON BOARD REFUELING VAPOR RECOVERY (ORVR)
ON BOARD REFUELING VAPOR RECOVERY (ORVR)
System Description
INFOID:0000000007358378
From the beginning of refueling, the air and vapor inside the fuel tank go through refueling EVAP vapor cut
valve and EVAP/ORVR line to the EVAP canister. The vapor is absorbed by the EVAP canister and the air is
released to the atmosphere.
When the refueling has reached the full level of the fuel tank, the refueling EVAP vapor cut valve is closed and
refueling is stopped because of auto shut-off. The vapor which was absorbed by the EVAP canister is purged
during driving.
WARNING:
When conducting inspections below, Always observe the following:
• Put a “CAUTION: FLAMMABLE” sign in workshop.
• Never smoke while servicing fuel system. Keep open flames and sparks away from work area.
• Always furnish the workshop with a CO
2
fire extinguisher.
CAUTION:
• Before removing fuel line parts, carry out the following procedures:
- Put drained fuel in an explosion-proof container and put lid on securely.
- Release fuel pressure from fuel line. Refer to
- Disconnect battery negative cable.
• Always replace O-ring when the fuel gauge retainer is removed.
• Never kink or twist hose and tube when they are installed.
• Never tighten hose and clamps excessively to avoid damaging hoses.
• After installation, run engine and check for fuel leaks at connections.
• Never attempt to top off the fuel tank after the fuel pump nozzle shuts off automatically.
Continued refueling may cause fuel overflow, resulting in fuel spray and possibly a fire.
Diagnosis Procedure
INFOID:0000000007358379
SYMPTOM: FUEL ODOR FROM EVAP CANISTER IS STRONG.
1.
CHECK EVAP CANISTER
1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached. Refer to
FL-16, "Removal and Installation"
2. Weigh the EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.
The weight should be less than 2.0 kg (4.4 lb).
OK or NG
OK
>> GO TO 2.
NG
>> GO TO 3.
PBIB1068E
August 2012
2012 Pathfinder
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст