Nissan X-Trail 32. Manual — part 756

FUEL PRESSURE CHECK

EC-153

< BASIC INSPECTION >

[MR20DD]

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• Use fuel tube adapter (SST: KV10120000) and fuel pressure gauge (SST: ST19590000) to check fuel

pressure.

4.

Install fuel hose for fuel pressure check to high pressure fuel
pump with hose clamp.

CAUTION:

• Wipe off oil or dirt from hose insertion part using cloth

moistened with gasoline.

• Apply proper amount of gasoline on the hose insertion

part.

• Insert fuel hose for fuel pressure check

until it touches-

the spool

on high pressure fuel pump

.

• Use NISSAN genuine hose clamp

(part number:

16439 N4710 or 16439 40U00).

• Install hose clamp to the hose end position within 1- 2 mm

(0.04 - 0.08 in) and tighten hose clamp to the specified torque.

• After connecting fuel hose for fuel pressure check, pull the hose with a force of approximately

100 N (approximately 10 kg, 22 lb) to confirm fuel sub tube does not come off.

5.

Install fuel pressure check adapter to quick connector of fuel
feed hose.

6.

Turn ignition switch ON and check for fuel leakage.

7.

Start engine and check for fuel leakage.

8.

Read the indication of fuel pressure gauge (A).

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

CHECK FUEL HOSE

Check fuel hose for clogging.
Is the inspection result normal?

YES

>> Repair or replace the malfunctioning part.

NO

>> Replace fuel filter and fuel pump assembly. Refer to

FL-11, "Exploded View"

.

Tightening torque: 1 - 1.5 N·m (0.1 - 0.15 kg

−

m)

At idling

: Approximately 500 kPa (5.0 bar,

5.1 kg/cm

2

, 73psi)

JPBIA4923GB

JSBIA1305ZZ

EC-154

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

DTC/CIRCUIT DIAGNOSIS

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

Description

INFOID:0000000010775090

The specification (SP) value indicates the tolerance of the value that is displayed in “SPEC” of “DATA MONI-
TOR” mode of CONSULT during normal operation of the Engine Control System. When the value in “SPEC” of
“DATA MONITOR” mode is within the SP value, the Engine Control System is confirmed OK. When the value
in “SPEC” of “DATA MONITOR” mode is NOT within the SP value, the Engine Control System may have one
or more malfunctions.
The SP value is used to detect malfunctions that may affect the Engine Control System, but will not light the
MIL.
The SP value will be displayed for the following three items:
• B/FUEL SCHDL (The fuel injection pulse width programmed into ECM prior to any learned on board correc-

tion)

• A/F ALPHA-B1 (The mean value of air-fuel ratio feedback correction factor per cycle)
• MASS AIR FLOW SENSOR (Hz) (The signal frequency of the mass air flow sensor)

Component Function Check

INFOID:0000000010775091

1.

START

Make sure that all of the following conditions are satisfied.
• Vehicle driven distance: More than 5,000 km (3,107 miles)
• Atmospheric pressure: 98.3 - 104.3 kPa (1.003 - 1.064 kg/cm

2

, 14.25 - 15.12 psi)

• Atmospheric temperature: 20 - 30

°

C (68 - 86

°

F)

• Engine coolant temperature: 75 - 95

°

C (167 - 203

°

F)

• Transmission: Warmed-up
- After the engine is warmed up to normal operating temperature, drive vehicle until “ATF TEMP SEN” (CVT

fluid temperature sensor signal) indicates more than 60

°

C (140

°

F).

• Electrical load: Not applied*
• Engine speed: Idle
*: Rear window defogger switch, air conditioner switch, lighting switch are OFF. Steering wheel is straight
ahead.

>> GO TO 2.

2.

PERFORM “SPEC” OF “DATA MONITOR” MODE

With CONSULT

NOTE:
Perform “SPEC” in “DATA MONITOR” mode in maximum scale display.
1.

Perform

EC-149, "Work Procedure"

.

2.

Select “B/FUEL SCHDL”, “A/F ALPHA-B1” and “MASS AIR FLOW SENSOR (Hz)” in “SPEC” of “DATA
MONITOR” mode with CONSULT.

3.

Make sure that monitor items are within the SP value.

Is the inspection result normal?

YES

>> END

NO

>> Proceed to

EC-155, "Diagnosis Procedure"

.

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

EC-155

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

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Diagnosis Procedure

INFOID:0000000010775092

OVERALL SEQUENCE

PBIB2318E

EC-156

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

DETAILED PROCEDURE

1.

CHECK “A/F ALPHA-B1”

With CONSULT

1.

Start engine.

2.

Confirm that the testing conditions are met. Refer to

EC-154, "Component Function Check"

.

3.

Select “A/F ALPHA-B1” in “SPEC” of “DATA MONITOR” mode, and make sure that the each indication is
within the SP value.

PBIB3213E