Nissan X-Trail 32. Instruction — 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
.
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.
.
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
.
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
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