Infiniti FX35 / FX45. Manual — part 470
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-641
< SERVICE INFORMATION >
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• When all SRT codes are set, MIL lights up continuously.
• When any SRT codes are not set, MIL will flash periodically for 10 seconds.
How to Set SRT Code
To set all SRT codes, self-diagnosis for the items indicated above must be performed one or more times. Each
diagnosis may require a long period of actual driving under various conditions.
WITH CONSULT-III
Perform corresponding DTC Confirmation Procedure one by one based on Performance Priority in the table
on "SRT Item".
WITHOUT CONSULT-III
The most efficient driving pattern in which SRT codes can be properly set is explained on the next page. The
driving pattern should be performed one or more times to set all SRT codes.
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ON BOARD DIAGNOSTIC (OBD) SYSTEM
Driving Pattern
• The time required for each diagnosis varies with road surface 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 short-
est.
Zone B refers to the range where the diagnosis can still be performed if the diagnosis is not completed within
zone A.
*: Normal conditions refer to the following:
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ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-643
< SERVICE INFORMATION >
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• Sea level
• Flat road
• Ambient air temperature: 20 - 30
°
C (68 - 86
°
F)
• Diagnosis is performed as quickly as possible under normal conditions.
Under different conditions [For example: ambient air temperature other than 20 - 30
°
C (68 - 86
°
F)], diagno-
sis may also be performed.
Pattern 1:
• The engine is started at the engine coolant temperature of
−
10 to 35
°
C (14 to 95
°
F)
(where the voltage between the ECM terminal 73 and ground is 3.0 - 4.3V).
• 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 73 and ground is lower than 1.4V).
• The engine is started at the fuel tank temperature of warmer than 0
°
C (32
°
F) (where the voltage
between the ECM terminal 107 and ground is less than 4.1V).
Pattern 2:
• 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:
• Operate vehicle following the driving pattern shown in the figure.
• Release the accelerator pedal during decelerating vehicle speed
from 90 km/h (56 MPH) to 0 km/h (0 MPH).
Pattern 4:
• The accelerator pedal must be held very steady during steady-
state driving.
• 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: Checking the vehicle speed with GST is advised.
Suggested Transmission Gear Position
Set the selector lever in the D position with the overdrive switch turned ON.
TEST VALUE AND TEST LIMIT
The following is the information specified in Service $06 of SAE J1979.
The test value is a parameter used to determine whether a system/circuit diagnostic test is OK or NG while
being monitored by the ECM during self-diagnosis. The test limit is a reference value which is specified as the
maximum or minimum value and is compared with the test value being monitored.
These data (test value and test limit) are specified by On Board Monitor ID(OBDMID), Test ID (TID), Unit and
Scaling ID and can be displayed on the GST screen.
The items of the test value and test limit will be displayed with GST screen which items are provided by the
ECM. (eg., if the bank 2 is not applied on this vehicle, only the items of the bank 1 is displayed)
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EC-644
< SERVICE INFORMATION >
[VK45DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Item
OBD-
MID
Self-diagnostic test item
DTC
Test value and Test
limit
(GST display)
Description
TID
Unit and
Scaling
ID
HO2S
01H
Air fuel ratio (A/F) sensor 1
(Bank 1)
P0131
83H
0BH
Minimum sensor output voltage for test
cycle
P0131
84H
0BH
Maximum sensor output voltage for test
cycle
P0130
85H
0BH
Minimum sensor output voltage for test
cycle
P0130
86H
0BH
Maximum sensor output voltage for test
cycle
P0133
87H
04H
Response rate: Response ratio (Lean to
Rich)
P0133
88H
04H
Response rate: Response ratio (Rich to
Lean)
P2A00
89H
84H
The amount of shift in air fuel ratio
P2A00
8AH
84H
The amount of shift in air fuel ratio
P0130
8BH
0BH
Difference in sensor output voltage
P0133
8CH
83H
Response gain at the limited frequency
02H
Heated oxygen sensor 2
(Bank 1)
P0138
07H
0CH
Minimum sensor output voltage for test
cycle
P0137
08H
0CH
Maximum sensor output voltage for test
cycle
P0138
80H
0CH
Sensor output voltage
P0139
81H
0CH
Difference in sensor output voltage
03H
Heated oxygen sensor 3
(Bank 1)
P0143
07H
0CH
Minimum sensor output voltage for test
cycle
P0144
08H
0CH
Maximum sensor output voltage for test
cycle
P0146
80H
0CH
Sensor output voltage
P0145
81H
0CH
Difference in sensor output voltage
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