Infiniti EX35. Manual - part 680

EC-462

< COMPONENT DIAGNOSIS >

[VQ35HR]

IGNITION SIGNAL

3.

Remove fuel pump fuse (1) in IPDM E/R (2) to release fuel pres-
sure.
NOTE:
Do not use CONSULT-III to release fuel pressure, or fuel pres-
sure applies again during the following procedure.

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 electri-
cal 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 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.

Component Inspection (Condenser)

INFOID:0000000003133650

1.

CHECK CONDENSER

1.

Turn ignition switch OFF.

2.

Disconnect condenser harness connector.

3.

Check resistance between condenser terminals as follows.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace condenser.

Spark should be generated.

JMBIA0021ZZ

JMBIA0066GB

Terminals

Resistance

1 and 2

Above 1 M

Ω

 [at 25

°

C (77

°

F)]

MALFUNCTION INDICATOR LAMP

EC-463

< COMPONENT DIAGNOSIS >

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MALFUNCTION INDICATOR LAMP

Description

INFOID:0000000003133651

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 

EC-100, "Diagnosis Description"

.

Component Function Check

INFOID:0000000003133652

1.

CHECK MIL FUNCTION

1.

Turn ignition switch ON.

2.

Check that MIL lights up.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC-463, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000003133653

1.

CHECK DTC

Check that DTC U1000 or U1001 is not displayed.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Perform trouble diagnosis for DTC U1000, U1001. Refer to 

EC-136, "Diagnosis Procedure"

.

2.

CHECK DTC WITH “UNIFIED METER AND A/C AMP.”

Refer to 

MWI-40, "CONSULT-III Function (METER/M&A)"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace malfunctioning part.

3.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-38, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace combination meter.

NO

>> Repair or replace malfunctioning part.

SEF217U

EC-464

< COMPONENT DIAGNOSIS >

[VQ35HR]

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

Description

INFOID:0000000003133654

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, be sure to observe the following:
• Put a “CAUTION: FLAMMABLE” sign in workshop.
• Do not smoke while servicing fuel system. Keep open flames and sparks away from work area.
• Be sure to 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 

EC-538, "Inspection"

.

- Disconnect battery ground cable.
• Always replace O-ring when the fuel gauge retainer is removed.
• Do not kink or twist hose and tube when they are installed.
• Do not tighten hose and clamps excessively to avoid damaging hoses.
• After installation, run engine and check for fuel leaks at connection.
• Do not 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.

Component Function Check

INFOID:0000000003133655

1.

CHECK ORVR FUNCTION

Check whether the following symptoms are present.
• Fuel odor from EVAP canister is strong.
• Cannot refuel/Fuel odor from the fuel filler opening is strong while refueling.
Is any symptom present?

YES

>> Go to 

EC-464, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003133656

1.

INSPECTION START

Check whether the following symptoms are present.
A: Fuel odor from EVAP canister is strong.

PBIB1068E

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

EC-465

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B: Cannot refuel/Fuel odor from the fuel filler opening is strong while refueling.

Which symptom is present?

A

>> GO TO 2.

B

>> GO TO 7.

2.

CHECK EVAP CANISTER

1.

Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.

2.

Weigh the EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.
The weight should be less than 2.1 kg (4.6 lb).

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 4.

3.

CHECK IF EVAP CANISTER SATURATED WITH WATER

Check if water will drain from EVAP canister (1).

Does water drain from the EVAP canister?

YES

>> GO TO 4.

NO

>> GO TO 6.

4.

REPLACE EVAP CANISTER

Replace EVAP canister with a new one.

>> GO TO 5.

5.

DETECT MALFUNCTIONING PART

Check the EVAP hose between EVAP canister and vehicle frame for clogging or poor connection.

>> Repair or replace EVAP hose.

6.

CHECK REFUELING EVAP VAPOR CUT VALVE

Refer to 

EC-467, "Component Inspection"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace refueling EVAP vapor cut valve with fuel tank.

7.

CHECK EVAP CANISTER

1.

Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.

2.

Weigh the EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.
The weight should be less than 2.1 kg (4.6 lb).

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> GO TO 9.

8.

CHECK IF EVAP CANISTER SATURATED WITH WATER

2

: EVAP canister vent control valve

PBIB2731E