Infiniti M45 (Y34). Manual — part 343
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-61
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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 121 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 121 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 92 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:
●
The driving pattern outlined in *2 must be repeated at least 3 times.
Pattern 4:
●
Tests are performed after the engine has been operated for at least 17 minutes.
●
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: Operate the vehicle in the following driving pattern.
1.
Decelerate vehicle to 0 km/h (0 MPH) and let engine idle.
2.
Repeat driving pattern shown at right at least 10 times.
–
During acceleration, hold the accelerator pedal as steady as
possible.
*3: Checking the vehicle speed with GST is advised.
Suggested Transmission Gear Position
Set the selector lever in the D position.
TEST VALUE AND TEST LIMIT (GST ONLY — NOT APPLICABLE TO CONSULT-II)
The following is the information specified in Mode 6 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.
SEF414S
EC-62
ON BOARD DIAGNOSTIC (OBD) SYSTEM
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
SRT 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
CATALYST
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
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
Heated oxygen sensor 1 (Bank 1)
P0133
09H
04H
Max.
16 ms
P1143
0AH
84H
Min.
10 mV
P1144
0BH 04H
Max.
10
mV
P0132
0CH
04H
Max.
10 mV
P0134
0DH
04H
Max.
1s
Heated oxygen sensor 1 (Bank 2)
P0153
11H
05H
Max.
16 ms
P1163
12H
85H
Min.
10 mV
P1164
13H
05H
Max.
10 mV
P0152
14H
05H
Max.
10 mV
P0154
15H
05H
Max.
1s
Heated oxygen sensor 2 (Bank 1)
P0139
19H
86H
Min.
10 mV/500 ms
P1147
1AH
86H
Min.
10 mV
P1146
1BH
06H
Max.
10 mV
P0138
1CH
06H
Max.
10 mV
Heated oxygen sensor 2 (Bank 2)
P0159
21H
87H
Min.
10 mV/500 ms
P1167
22H
87H
Min.
10 mV
P1166
23H
07H
Max.
10 mV
P0158
24H
07H
Max.
10 mV
HO2S HTR
Heated oxygen sensor 1 heater (Bank 1)
P0032
29H
08H
Max.
20 mV
P0031
2AH
88H
Min.
20 mV
Heated oxygen sensor 1 heater (Bank 2)
P0052
2BH
09H
Max.
20 mV
P0051
2CH
89H
Min.
20 mV
Heated oxygen sensor 2 heater (Bank 1)
P0038
2DH
0AH
Max.
20 mV
P0037
2EH
8AH
Min.
20 mV
Heated oxygen sensor 2 (Bank 2)
P0058
2FH
0BH
Max.
20 mV
P0057
30H
8BH
Min.
20 mV
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-63
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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.)
With GST
The emission related diagnostic information in the ECM can be erased by selecting Mode 4 with GST.
NOTE:
If the DTC is not for A/T 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 (WITH GST)"
. (The DTC in the TCM will be erased.)
3.
Select Mode 4 with GST (Generic Scan Tool).
NO Tools
NOTE:
If the DTC is not for A/T 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-42, "HOW TO ERASE DTC (NO TOOLS)"
. (The DTC in the TCM will be erased.)
SCIA5334E
EC-64
ON BOARD DIAGNOSTIC (OBD) SYSTEM
3.
Change the diagnostic test mode from Mode II to Mode I by depressing the accelerator pedal. Refer to
EC-65, "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
–
Test values
–
Others
Actual work procedures are explained using a DTC as an example. Be careful so that not only the DTC, but all
of the data listed above, are cleared from the ECM memory during work procedures.
IVIS (Infiniti Vehicle Immobilizer System — NATS)
ABS002DI
●
If the security indicator lights up with the ignition switch in
the ON position or “NATS MALFUNCTION” is displayed on
“SELF-DIAG RESULTS” screen, perform self-diagnostic
results mode with CONSULT-II using NATS program card.
Refer to
BL-172, "IVIS (INFINITI VEHICLE IMMOBILIZER
.
●
Confirm no self-diagnostic results of IVIS (NATS) is dis-
played before touching “ERASE” in “SELF-DIAG RESULTS”
mode with CONSULT-II.
●
When replacing ECM, initialization of IVIS (NATS) system
and registration of all IVIS (NATS) ignition key IDs must be
carried out with CONSULT-II using NATS program card.
Therefore, be sure to receive all keys from vehicle owner. Regarding the procedures of IVIS (NATS)
initialization and all IVIS (NATS) ignition key ID registration, refer to CONSULT-II Operation Manual,
IVIS/NVIS.
Malfunction Indicator Lamp (MIL)
ABS002DJ
DESCRIPTION
The MIL is located on the instrument panel.
1.
The MIL will light up when the ignition switch is turned ON with-
out the engine running. This is a bulb check.
If the MIL does not light up, refer to
or see
2.
When the engine is started, the MIL should go off.
If the MIL remains on, the on board diagnostic system has
detected an engine system malfunction.
SEF543X
SEF217U
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