Infiniti Q45 (FY33). Manual - part 132
I
The time required for each diagnosis varies with road sur-
face conditions, weather, altitude, individual driving habits,
etc.
Zone A refers to the range where the time required, for the
diagnosis under normal conditions*, is the shortest. Zone B
refers to the range where the diagnosis can still be per-
formed if the diagnosis is not completed within zone A.
*: Normal conditions refer to the following:
— Sea level
— Flat road
— Ambient temperature: 20 - 30°C (68 - 86°F)
— Diagnosis is performed as quickly as possible under nor-
mal conditions.
Under different conditions [For example: ambient tempera-
ture is other than 20 - 30°C (68 - 86°F)], diagnosis may
also be performed.
Pattern 1:
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The engine is started at the engine coolant tem-
perature of −10 to 35°C (14 to 95°F) (where the
voltage between the ECM terminal
q
67
and
ground is 3.0 - 4.3 V.)
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The engine must be operated at idle speed until
the engine coolant temperature is greater than
70°C (158°F) (where the voltage between the
ECM terminal
q
67
and ground is lower than 1.4 V.)
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The engine is started at a fuel tank temperature
warmer than 0°C (32°F) (where the voltage
between the ECM terminal
q
91
and ground is less
than 4.1V).
Pattern 2:
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When steady-state driving is performed again
even after it is interrupted, each diagnosis can
be conducted. In this case, the time required for
diagnosis may be extended.
Pattern 3:
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The driving pattern outlined in *2 must be
repeated at least 3 times.
Pattern 4:
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Tests are performed after the engine has been
operated for at least 17 minutes.
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The accelerator pedal must be held very steady
during steady-state driving.
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If the accelerator pedal is moved, the test must
be conducted all over again.
*1: Depress the accelerator pedal until vehicle speed is 90
km/h (56 MPH), then release the accelerator pedal and
keep it released for more than 10 seconds. Depress the
accelerator pedal until vehicle speed is 90 km/h (56 MPH)
again.
*2: Operate the vehicle in the following driving pattern.
1) Decelerate vehicle to 0 km/h (0 MPH) and let it idle.
2) Repeat driving pattern shown below at least 10 times.
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During acceleration, hold the accelerator pedal
as steady as possible.
3) Repeat steps and 2 until the EGR system SRT is set.
SEF414S
*3: Checking the vehicle speed with GST is advised.
Suggested transmission gear position
Set the selector lever in the “D” position with “OD”
ON.
Suggested maximum speed in each gear
Downshift to a lower gear if the engine is not running
smoothly, or if you need to accelerate.
Do not exceed the maximum suggested speed
(shown below) in any gear. For level road driving,
use the highest gear suggested for that speed.
Always observe posted speed limits, and drive
according to the road conditions, which will ensure
safe operation. Do not over-rev the engine when
shifting to a lower gear as it may cause engine dam-
age or loss of vehicle control.
Gear
km/h (MPH)
1st
50 (30)
2nd
95 (60)
3rd
145 (90)
4th
—
5th
—
GI
MA
EM
LC
FE
AT
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Emission-related Diagnostic Information
(Cont’d)
EC-57