Content .. 161 162 163 164 ..

Nissan March K13. Manual - part 163

FUEL PRESSURE CHECK

EC-113

< BASIC INSPECTION >

[HR12DE (TYPE 1)]

FUEL PRESSURE CHECK

Work Procedure

INFOID:0000000005995488

FUEL PRESSURE RELEASE

With CONSULT-III

Turn ignition switch ON.

Perform “FUEL PRESSURE RELEASE” in “WORK SUPPORT” mode with CONSULT-III.

Start engine.

After engine stalls, crank it two or three times to release all fuel pressure.

Turn ignition switch OFF.

Without CONSULT-III

Remove fuel pump fuse located in IPDM E/R.

Start engine.

After engine stalls, crank it two or three times to release all fuel pressure.

Turn ignition switch OFF.

Reinstall fuel pump fuse after servicing fuel system.

>> INSPECTION END

FUEL PRESSURE CHECK

CAUTION:

• Before disconnecting fuel line, release fuel pressure from fuel line to eliminate danger.
• The fuel hose connection method used when taking fuel pressure check must not be used for other

purposes.

• Be careful not to scratch or put debris around connection area when servicing, so that the quick

connector maintains seal ability with O-rings inside.

• Do not perform fuel pressure check with electrical systems operating (i.e. lights, rear defogger, A/C,

etc.) Fuel pressure gauge may indicate false readings due to varying engine load and changes in
manifold vacuum.

NOTE:
Prepare pans or saucers under the disconnected fuel line because the fuel may spill out. The fuel pres-
sure cannot be completely released because this models do not have fuel return system.
1.

Release fuel pressure to zero.

Prepare fuel hose for fuel pressure check (B) and fuel tube
adapter [SST (KV10120000)] (D), then connect fuel pressure
gauge (A).

CAUTION:

• Use suitable fuel hose for fuel pressure check (genuine

NISSAN fuel hose without quick connector).

• To avoid unnecessary force or tension to hose, use mod-

erately long fuel hose for fuel pressure check.

• Do not use the fuel hose for checking fuel pressure with damage or cracks on it.
• Use Pressure Gauge to check fuel pressure.

Disconnect fuel feed hose from fuel tube. Refer to

EM-37, "Exploded View"

CAUTION:

Do not twist or kink fuel hose because it is plastic hose.

To quick connector

To fuel tube (engine side)

: Hose clamp

PBIB2982E

EC-114

< BASIC INSPECTION >

[HR12DE (TYPE 1)]

FUEL PRESSURE CHECK

Connect fuel hose for fuel pressure check (1) to fuel tube
(engine side) with clamp (2) as shown in the figure.

CAUTION:

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

moistened with gasoline.

• Apply proper amount of gasoline between top of the fuel

tube (3) and No.1 spool (4).

• Insert fuel hose for fuel pressure check until it touches

the No.1 spool on fuel tube.

• Use NISSAN genuine hose clamp (part number: 16439

N4710 or 16439 40U00).

• When reconnecting fuel line, always use new clamps.
• Use a torque driver to tighten clamps.
• Install hose clamp to the position within 1 - 2 mm (0.04 - 0.08 in).

• Make sure that clamp screw does not contact adjacent parts.

Connect fuel tube adapter (C) to quick connector (1).

After connecting fuel hose for fuel pressure check, pull the hose with a force of approximately 98 N (10 kg,
22 lb) to confirm fuel tube does not come off.

Reinstall the part removed at Step 3.
NOTE:
Install the part to allow smooth engine starts.

Turn ignition switch ON and check for fuel leakage.

Start engine and check for fuel leakage.

10. Read the indication of fuel pressure gauge.

CAUTION:

• Do not perform fuel pressure check with system operating. Fuel pressure gauge may indicate

false readings.

• During fuel pressure check, confirm for fuel leakage from fuel connection every 3 minutes.

Is the inspection result normal?

YES

>> INSPECTION END

>> GO TO 2.

CHECK FUEL HOSE AND FUEL TUBE

If result is unsatisfactory, check fuel hoses and fuel tubes for clogging.

Is the inspection result normal?

YES

>> Replace fuel level sensor unit, fuel filter and fuel pump assembly. Refer to

FL-5, "Exploded View"

>> Repair or replace.

5 : No.2 spool

Tightening torque

: 1 - 1.5 N·m (0.1 - 0.15 kg-m, 9 - 13 in-lb)

A : Fuel pressure gauge

B : Fuel hose for fuel pressure check

PBIB2983E

JSBIA0380ZZ

At idling:

Approximately 350 kPa (3.5 bar, 3.57 kg/cm

, 51 psi)

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

EC-115

< DTC/CIRCUIT DIAGNOSIS >

[HR12DE (TYPE 1)]

DTC/CIRCUIT DIAGNOSIS

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

Description

INFOID:0000000005989223

The specification (SP) value indicates the tolerance of the value that is displayed in “SPEC” of “DATA MONI-
TOR” mode of CONSULT-III 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)
• MAS A/F SE-B1 (The signal voltage of the mass air flow sensor)

Component Function Check

INFOID:0000000005989224

START

Make sure that all of the following conditions are satisfied.
• Vehicle driven distance: More than 5,000 km (3,107 miles)
• Barometric pressure: 98.3 - 104.3 kPa (0.983 - 1.043 bar, 1.003 - 1.064 kg/cm

, 14.25 - 15.12 psi)

• Atmospheric temperature: 20 - 30

C (68 - 86

• Engine coolant temperature: 75 - 95

C (167 - 203

• Transmission: Warmed-up
- After the engine is warmed up to normal operating temperature, drive vehicle for 5 minutes.
• Electrical load: Not applied
- Rear window defogger switch, air conditioner switch, lighting switch are OFF. Steering wheel is straight

ahead.

• Engine speed: Idle

>> GO TO 2.

PERFORM “SPEC” OF “DATA MONITOR” MODE

With CONSULT-III

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

Perform

EC-109, "Work Procedure"

Select “B/FUEL SCHDL”, “A/F ALPHA-B1” and “MAS A/F SE-B1” in “SPEC” of “DATA MONITOR” mode
with CONSULT-III.

Make sure that monitor items are within the SP value.

Is the inspection result normal?

YES