Infiniti QX56 (Z62). Manual — part 544
EC-154
< BASIC INSPECTION >
[VK56VD]
FUEL PRESSURE
4.
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.
5.
Connect fuel tube adapter (C) to fuel feed hose (1) in the same
manner as instructed in Step 4.
6.
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.
7.
Reinstall the part removed at Step 3.
NOTE:
Install the part to allow smooth engine starts.
8.
Turn ignition switch ON and check for fuel leakage.
9.
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.
HIGH FUEL PRESSURE CHECK
NOTE:
Since the fuel pressure gauge kit cannot be connected, follow the method shown below to check high fuel
pressure.
WITH CONSULT-III
1.
Start engine.
2.
Check “FUEL PRES SEN V” in “DATA MONITOR” mode with CONSULT-III.
5 : No.2 spool
Tightening torque
: 1.0 - 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
JSBIA0491ZZ
At idling
: Approximately 450 kPa (4.5 bar, 4.6 kg/cm
2
,
65 psi)
FUEL PRESSURE
EC-155
< BASIC INSPECTION >
[VK56VD]
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WITHOUT CONSULT-III
1.
Start the engine.
2.
Check fuel rail pressure sensor signal voltage.
Monitor Item
Condition
Values/Status
FUEL PRES SEN V
Idle
980 – 1,200 mV
Revving engine from idle to 4,000 rpm quickly
1,100 – 2,900 mV
+
−
Condition
Value
(Approx.)
Fuel rail pressure sensor
Connector
Terminal
F26
2
Ground
Engine speed: idle
0.98 – 1.2 V
Engine speed: Revving engine from idle to 4,000 rpm quickly
1.1 – 2.9 V
EC-156
< BASIC INSPECTION >
[VK56VD]
HOW TO SET SRT CODE
HOW TO SET SRT CODE
Description
INFOID:0000000006265593
OUTLINE
In order to set all SRTs, the self-diagnoses as in the “SRT ITEM” table must have been performed at least
once. Each diagnosis may require actual driving for a long period of time under various conditions.
SRT ITEM
The table below shows required self-diagnostic items to set the SRT to “CMPLT”.
*1: Though displayed on the CONSULT-III screen, “HO2S HTR” is not SRT item.
SRT SERVICE PROCEDURE
If a vehicle has failed the state emissions inspection due to one or more SRT items indicating “INCMP”, review
the flowchart diagnostic sequence, referring to the following flowchart.
SRT item
*1
(CONSULT-III indication)
Required self-diagnostic items to set the SRT to “CMPLT”
Corresponding DTC No.
CATALYST
Three way catalyst function
P0420, P0430
EVAP SYSTEM
EVAP control system purge flow monitoring
P0441
EVAP control system
P0456
HO2S
Air fuel ratio (A/F) sensor 1
P0130, P0133, P0150, P0153
Heated oxygen sensor 2
P0137, P0157
Heated oxygen sensor 2
P0138, P0158
Heated oxygen sensor 2
P0139, P0159
EGR/VVT SYSTEM
Intake value timing control function
P0011, P0021
HOW TO SET SRT CODE
EC-157
< BASIC INSPECTION >
[VK56VD]
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SRT Set Driving Pattern
INFOID:0000000006265594
CAUTION:
JSBIA0399GB
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