Infiniti Q45. Manual — part 355
ON BOARD DIAGNOSTIC (OBD) SYSTEM
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●
The time required for each diagnosis varies with road surface conditions, weather, altitude, individual driv-
ing 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 performed if the diagnosis is not completed
within zone A.
*: Normal conditions refer to the following:
●
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)], diag-
nosis 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 con-
ducted. 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.
PBIB2244E
EC-60
ON BOARD DIAGNOSTIC (OBD) SYSTEM
TEST VALUE AND TEST LIMIT (GST ONLY — NOT APPLICABLE TO CONSULT-II)
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 Test ID (TID) and Component ID (CID) and can be dis-
played on the GST screen.
Item
Self-diagnostic test item
DTC
Test value (GST display)
Test limit
Conversion
TID
CID
CATALYST
Three way catalyst function (Bank 1)
P0420
01H
01H
Max.
1/128
P0420
02H
81H
Min.
1
Three way catalyst function (Bank 2)
P0430
03H
02H
Max.
1/128
P0430
04H
82H
Min.
1
EVAP
SYSTEM
EVAP control system (Small leak)
P0442
05H
03H
Max.
1/128 mm
2
P1442
05H
03H
Max.
1/128 mm
2
EVAP control system purge flow monitoring
P0441
06H
83H
Min.
20 mV
EVAP control system (Very small leak)
P0456
07H
03H
Max.
1/128 mm
2
P1456
07H
03H
Max.
1/128 mm
2
HO2S
Air fuel ratio (A/F) sensor 1 (Bank 1)
P0131
41H
8EH
Min.
5mV
P0132
42H
0EH
Max.
5mV
P2A00
43H
0EH
Max.
0.002
P2A00
44H
8EH
Min.
0.002
P0133 45H 8EH Min. 0.004
P0130
46H
0EH
Max.
5mV
P0130
47H
8EH
Min.
5mV
P0133 48H 8EH Min. 0.004
Air fuel ratio (A/F) sensor 1 (Bank 2)
P0151
4CH
8FH
Min.
5mV
P0152
4DH
0FH
Max.
5mV
P2A03
4EH
0FH
Max.
0.002
P2A03
4FH
8FH
Min.
0.002
P0153 50H 8FH Min. 0.004
P0150
51H
0FH
Max.
5mV
P0150
52H
8FH
Min.
5mV
P0153 53H 8FH Min. 0.004
Heated oxygen sensor 2 (Bank 1)
P0139
19H
86H
Min.
10mV/500 ms
P0137
1AH
86H
Min.
10 mV
P0138
1BH
06H
Max.
10 mV
P0138
1CH
06H
Max.
10mV
Heated oxygen sensor 2 (Bank 2)
P0159
21H
87H
Min.
10 mV/500 ms
P0157
22H
87H
Min.
10 mV
P0158
23H
07H
Max.
10 mV
P0158
24H
07H
Max.
10mV
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-61
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HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION
How to Erase DTC
WITH CONSULT-II
The emission related diagnostic information in the ECM can be erased by selecting “ERASE” in the “SELF-
DIAG RESULTS” mode with CONSULT-II.
If DTCs are displayed for both ECM and TCM (Transmission control module), they need to be erased individu-
ally from the ECM and TCM (Transmission control module).
NOTE:
If the DTC is not for A/T related items (see
), skip steps 2 through 4.
1.
If the ignition switch stays ON after repair work, be sure to turn ignition switch OFF once. Wait at least 10
seconds and then turn it ON (engine stopped) again.
2.
Turn CONSULT-II ON and touch “A/T”.
3.
Touch “SELF-DIAG RESULTS”.
4.
Touch “ERASE”. [The DTC in the TCM (Transmission control module) will be erased.] Then touch “BACK”
twice.
5.
Touch “ENGINE”.
6.
Touch “SELF-DIAG RESULTS”.
7.
Touch “ERASE”. (The DTC in the ECM will be erased.)
HO2S
HEATER
A/F sensor 1 heater (Bank 1)
P0032
57H
10H
Max.
5 mV
P0031
58H
90H
Min.
5 mV
A/F sensor 1 heater (Bank 2)
P0052
59H
11H
Max.
5 mV
P0051
5AH
91H
Min.
5 mV
Heated oxygen sensor 2 heater (Bank 1)
P0038
2DH
0AH
Max.
20 mV
P0037
2EH
8AH
Min.
20 mV
Heated oxygen sensor 2 heater (Bank 2)
P0058
2FH
0BH
Max.
20 mV
P0057
30H
8BH
Min.
20 mV
Item
Self-diagnostic test item
DTC
Test value (GST display)
Test limit
Conversion
TID
CID
EC-62
ON BOARD DIAGNOSTIC (OBD) SYSTEM
WITH GST
The emission related diagnostic information in the ECM can be erased by selecting Service $04 with GST.
NOTE:
If the DTC is not for A/T related items (see
1.
If the ignition switch stays ON after repair work, be sure to turn ignition switch OFF once. Wait at least 10
seconds and then turn it ON (engine stopped) again.
2.
Perform
AT-41, "HOW TO ERASE DTC (WITH GST)"
. (The DTC in TCM will be erased)
3.
Select Service $04 with GST (Generic Scan Tool).
No Tools
NOTE:
If the DTC is not for AT related items (see
), skip step 2.
1.
If the ignition switch stays ON after repair work, be sure to turn ignition switch OFF once.
Wait at least 10 seconds and then turn it ON (engine stopped) again.
2.
Perform
AT-41, "HOW TO ERASE DTC (NO TOOLS)"
. (The DTC in the TCM will be erased.)
3.
Change the diagnostic test mode from Mode II to Mode I by depressing the accelerator pedal. Refer to
EC-64, "HOW TO SWITCH DIAGNOSTIC TEST MODE"
.
●
If the battery is disconnected, the emission-related diagnostic information will be lost within 24
hours.
●
The following data are cleared when the ECM memory is erased.
–
Diagnostic trouble codes
–
1st trip diagnostic trouble codes
–
Freeze frame data
–
1st trip freeze frame data
–
System readiness test (SRT) codes
SCIA5671E
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