2005 INFINITI FX35 engine

ON BOARD DIAGNOSTIC (OBD) SYSTEM EC-55
[VQ35DE]
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EC
Revision: 2005 July 2005 FX
The fail-safe function also operates when above diagnoses except MIL circuit are detected and demands the
driver to repair the malfunction.
Emission-Related Diagnostic InformationABS006KK
EMISSION-RELATED DIAGNOSTIC INFORMATION ITEMS
× : Applicable —: Not applicable
Engine operating condition in fail-safe mode Engine speed will not rise more than 2,500 rpm due to the fuel cut
Items
(CONSULT-II screen terms) DTC*
1
SRT code
Test value/
Test limit
(GST only) Trip
Reference
page
CONSULT-II
GST*
2ECM*3
CAN COMM CIRCUIT U1000 1000*5—— 1 ×EC-171
CAN COMM CIRCUIT U1001
1001*5—— 2 — EC-171
NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED. P0000 0000
———
Flashing*9—
INT/V TIM CONT-B1 P0011 0011 — — 2 ×EC-174
INT/V TIM CONT-B2 P0021 0021 — — 2 ×EC-174
HO2S2 HTR (B1) P0037 0037 ××2×EC-178
HO2S2 HTR (B1) P0038 0038 ××2×EC-178
HO2S2 HTR (B2) P0057 0057 ××2×EC-178
HO2S2 HTR (B2) P0058 0058 ××2×EC-178
MAF SEN/CIRCUIT P0101 0101 — — 2 ×EC-186
MAF SEN/CIRCUIT P0102 0102 — — 1 ×EC-195
MAF SEN/CIRCUIT P0103 0103 — — 1 ×EC-195
IAT SEN/CIRCUIT P0112 0112 — — 2 ×EC-203
IAT SEN/CIRCUIT P0113 0113 — — 2 ×EC-203
ECT SEN/CIRCUIT P0117 0117 — — 1 ×EC-208
ECT SEN/CIRCUIT P0118 0118 — — 1 ×EC-208
TP SEN 2/CIRC P0122 0122 — — 1 ×EC-213
TP SEN 2/CIRC P0123 0123 — — 1 ×EC-213
ECT SENSOR P0125 0125 — — 1 ×EC-220
IAT SENSOR P0127 0127 — — 2 ×EC-223
THERMSTAT FNCTN P0128 0128 — — 2 ×EC-226
HO2S2 (B1) P0138 0138 — ×2 ×EC-228
HO2S2 (B1) P0139 0139 ××2×EC-237
HO2S2 (B2) P0158 0158 — ×2 ×EC-228
HO2S2 (B2) P0159 0159 ××2×EC-237
FUEL SYS-LEAN-B1 P0171 0171 — — 2 ×EC-248
FUEL SYS-RICH-B1 P0172 0172 — — 2 ×EC-258
FUEL SYS-LEAN-B2 P0174 0174 — — 2 ×EC-248
FUEL SYS-RICH-B2 P0175 0175 — — 2 ×EC-258
FTT SENSOR P0181 0181 — — 2 ×EC-267
FTT SEN/CIRCUIT P0182 0182 — — 2 ×EC-273
FTT SEN/CIRCUIT P0183 0183 — — 2 ×EC-273
TP SEN 1/CIRC P0222 0222 — — 1 ×EC-278
TP SEN 1/CIRC P0223 0223 — — 1 ×EC-278
MULTI CYL MISFIRE P0300 0300 — — 2 ×EC-285

EC-56
[VQ35DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Revision: 2005 July 2005 FX
CYL 1 MISFIRE P0301 0301 — — 2 ×EC-285
CYL 2 MISFIRE P0302 0302 — — 2 ×EC-285
CYL 3 MISFIRE P0303 0303 — — 2 ×EC-285
CYL 4 MISFIRE P0304 0304 — — 2 ×EC-285
CYL 5 MISFIRE P0305 0305 — — 2 ×EC-285
CYL 6 MISFIRE P0306 0306 — — 2 ×EC-285
KNOCK SEN/CIRC-B1 P0327 0327 — — 2 — EC-295
KNOCK SEN/CIRC-B1 P0328 0328 — — 2 —EC-295
CKP SEN/CIRCUIT P0335 0335 — — 2×EC-300
CMP SEN/CIRC-B1 P0340 0340 — — 2 ×EC-307
CMP SEN/CIRC-B2 P0345 0345 — — 2 ×EC-307
TW CATALYST SYS-B1 P0420 0420 ××2×EC-316
TW CATALYST SYS-B2 P0430 0430 ××2×EC-316
EVAP PURG FLOW/MON P0441 0441 ××2×EC-322
EVAP SMALL LEAK P0442 0442 ××2×EC-327
PURG VOLUME CONT/V P0444 0444 — — 2 ×EC-336
PURG VOLUME CONT/V P0445 0445 — — 2 ×EC-336
VENT CONTROL VALVE P0447 0447 — — 2 ×EC-343
EVAP SYS PRES SEN P0451 0451 — — 2 ×EC-350
EVAP SYS PRES SEN P0452 0452 — — 2 ×EC-353
EVAP SYS PRES SEN P0453 0453 — — 2 ×EC-359
EVAP GROSS LEAK P0455 0455 — — 2 ×EC-367
EVAP VERY SML LEAK P0456 0456
× *4× 2 ×EC-375
FUEL LEV SEN SLOSH P0460 0460 — — 2 ×EC-385
FUEL LEVEL SENSOR P0461 0461 — — 2 ×EC-387
FUEL LEVL SEN/CIRC P0462 0462 — — 2 ×EC-389
FUEL LEVEL SEN/CIRC P0463 0463 — — 2 ×EC-389
VEH SPEED SEN/CIRC*6P0500 0500 — — 2 ×EC-391
ISC SYSTEM P0506 0506 — — 2 ×EC-393
ISC SYSTEM P0507 0507 — — 2 ×EC-395
PW ST P SEN/CIRC P0550 0550 — — 2 — EC-397
ECM P0605 0605 — — 1 or 2× or — EC-402
TCM P0700 0700 — — 1 ×AT- 11 3
PNP SW/CIRC P0705 0705 — — 2 ×AT- 11 4
ATF TEMP SEN/CIRC P0710 0710 — — 2 ×AT-136
VEH SPD SEN/CIR AT*6P0720 0720 — — 2 ×AT- 11 8
ENGINE SPEED SIG P0725 0725 — — 2 ×AT-123
TCC SOLENOID/CIRC P0740 0740 — — 2 ×AT-125
A/T TCC S/V FNCTN P0744 0744 — — 2 ×AT-127
L/PRESS SOL/CIRC P0745 0745 — — 2 ×AT-129
A/F SEN1 HTR (B1) P1031 1031 ××2×EC-405
A/F SEN1 HTR (B1) P1032 1032 ××2×EC-405
Items
(CONSULT-II screen terms) DTC*
1
SRT code
Test value/
Test limit
(GST only) Trip
Reference
page
CONSULT-II
GST*
2ECM*3

ON BOARD DIAGNOSTIC (OBD) SYSTEM EC-59
[VQ35DE]
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Revision: 2005 July 2005 FX
For malfunctions in which 1st trip DTCs are displayed, refer to EC-55, "EMISSION-RELATED DIAGNOSTIC
INFORMATION ITEMS" . These items are required by legal regulations to continuously monitor the system/
component. In addition, the items monitored non-continuously are also displayed on CONSULT-II.
1st trip DTC is specified in Service $07 of SAE J1979. 1st trip DTC detection occurs without lighting up the MIL
and therefore does not warn the driver of a malfunction. However, 1st trip DTC detection will not prevent the
vehicle from being tested, for example during Inspection/Maintenance (I/M) tests.
When a 1st trip DTC is detected, check, print out or write down and erase (1st trip) DTC and Freeze Frame
data as specified in Work Flow procedure Step II, refer to EC-102, "
WORK FLOW" . Then perform DTC Con-
firmation Procedure or Overall Function Check to try to duplicate the malfunction. If the malfunction is dupli-
cated, the item requires repair.
How to Read DTC and 1st Trip DTC
DTC and 1st trip DTC can be read by the following methods.
With CONSULT-II
With GST
CONSULT-II or GST (Generic Scan Tool) Examples: P0340, P1148, P1706, etc.
These DTCs are prescribed by SAE J2012.
(CONSULT-II also displays the malfunctioning component or system.)
No Tools
The number of blinks of the MIL in the Diagnostic Test Mode II (Self-Diagnostic Results) indicates the DTC.
Example: 0340, 1148, 1706, etc.
These DTCs are controlled by NISSAN.

1st trip DTC No. is the same as DTC No.

Output of a DTC indicates a malfunction. However, GST or the Diagnostic Test Mode II do not indi-
cate whether the malfunction is still occurring or has occurred in the past and has returned to nor-
mal. CONSULT-II can identify malfunction status as shown below. Therefore, using CONSULT-II (if
available) is recommended.
A sample of CONSULT-II display for DTC and 1st trip DTC is shown below. DTC or 1st trip DTC of a malfunc-
tion is displayed in SELF-DIAGNOSTIC RESULTS mode of CONSULT-II. Time data indicates how many times
the vehicle was driven after the last detection of a DTC.
If the DTC is being detected currently, the time data will be [0].
If a 1st trip DTC is stored in the ECM, the time data will be [1t].
FREEZE FRAME DATA AND 1ST TRIP FREEZE FRAME DATA
The ECM records the driving conditions such as fuel system status, calculated load value, engine coolant tem-
perature, short term fuel trim, long term fuel trim, engine speed, vehicle speed, base fuel schedule and intake
air temperature at the moment a malfunction is detected.
Data which are stored in the ECM memory, along with the 1st trip DTC, are called 1st trip freeze frame data.
The data, stored together with the DTC data, are called freeze frame data and displayed on CONSULT-II or
GST. The 1st trip freeze frame data can only be displayed on the CONSULT-II screen, not on the GST. For
details, see EC-136, "
Freeze Frame Data and 1st Trip Freeze Frame Data" .
Only one set of freeze frame data (either 1st trip freeze frame data or freeze frame data) can be stored in the
ECM. 1st trip freeze frame data is stored in the ECM memory along with the 1st trip DTC. There is no priority
for 1st trip freeze frame data and it is updated each time a different 1st trip DTC is detected. However, once
freeze frame data (2nd trip detection/MIL on) is stored in the ECM memory, 1st trip freeze frame data is no
longer stored. Remember, only one set of freeze frame data can be stored in the ECM. The ECM has the fol-
lowing priorities to update the data.
PBIB0911E

EC-66
[VQ35DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Revision: 2005 July 2005 FX

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.

replace the accelerator pedal during decelerating vehicle speed
from 90km/h(56MPH) to 0km/h(0MPH).
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.
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.
PBIB2244E

EC-68
[VQ35DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Revision: 2005 July 2005 FX
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 EC-15
), 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.)
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 EC-15
), 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.
SCIA5671E

ON BOARD DIAGNOSTIC (OBD) SYSTEM EC-69
[VQ35DE]
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EC
Revision: 2005 July 2005 FX
2. Perform AT- 4 2 . (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 A/T related items (see EC-15
), 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- 4 2
. (The DTC in TCM will be erased.)
3. Change the diagnostic test mode from Mode II to Mode I by depressing the accelerator pedal. Refer to EC-70, "
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
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.
Malfunction Indicator Lamp (MIL)ABS006KM
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 DI-42, "
WARNING LAMPS" ,
or see EC-703
.
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.
SEF217U

EC-70
[VQ35DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Revision: 2005 July 2005 FX
ON BOARD DIAGNOSTIC SYSTEM FUNCTION
The on board diagnostic system has the following three functions.
When there is an open circuit on MIL circuit, the ECM cannot warn the driver by lighting up MIL when there is
malfunction on engine control system.
Therefore, when electrical controlled throttle and part of ECM related diagnoses are continuously detected as
NG for 5 trips, ECM warns the driver that engine control system malfunctions and MIL circuit is open by means
of operating fail-safe function.
The fail-safe function also operates when above diagnoses except MIL circuit are detected and demands the
driver to repair the malfunction.
MIL Flashing Without DTC
When any SRT codes are not set, MIL may flash without DTC. For the details, refer to EC-63, "How to Display
SRT Status" .
HOW TO SWITCH DIAGNOSTIC TEST MODE
NOTE:

It is better to count the time accurately with a clock.

It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit
has a malfunction.

Always ECM returns to Diagnostic Test Mode I after ignition switch is turned OFF.
How to Set Diagnostic Test Mode II (Self-Diagnostic Results)
1. Confirm that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds.
2. Repeat the following procedure quickly 5 times within 5 seconds.
a. Fully depress the accelerator pedal.
b. Fully release the accelerator pedal.
3. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 10 seconds until the MIL starts blinking.
Diagnostic Test
Mode KEY and ENG.
Sta tus Function Explanation of Function
Mode I Ignition switch in ON position
Engine stopped BULB CHECK This function checks the MIL bulb for damage (blown,
open circuit, etc.).
If the MIL does not come on, check MIL circuit.
Engine running MALFUNCTION WARNING This is a usual driving condition. When a malfunction is
detected twice in two consecutive driving cycles (two trip
detection logic), the MIL will light up to inform the driver
that a malfunction has been detected.
The following malfunctions will light up or blink the MIL in
the 1st trip.

Misfire (Possible three way catalyst damage)

One trip detection diagnoses
Mode II Ignition switch in ON position
Engine stopped SELF-DIAGNOSTIC
RESULTS This function allows DTCs and 1st trip DTCs to be read.
Engine operating condition in fail-safe mode Engine speed will not rise more than 2,500 rpm due to the fuel cut

ON BOARD DIAGNOSTIC (OBD) SYSTEM EC-75
[VQ35DE]
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EC
Revision: 2005 July 2005 FX
EXPLANATION FOR DRIVING PATTERNS FOR “MISFIRE TION>”, “FUEL INJECTION SYSTEM”

Driving pattern B means the vehicle operation as follows:
All components and systems should be monitored at least once by the OBD system.

The B counter will be cleared when the malfunction is detected once regardless of the driving pattern.

The B counter will be counted up when driving pattern B is satisfied without any malfunction.

The MIL will go off when the B counter reaches 3. (*2 in “OBD SYSTEM OPERATION CHART”)

Driving pattern C means the vehicle operation as follows:
The following conditions should be satisfied at the same time:
Engine speed: (Engine speed in the freeze frame data) ±375 rpm
Calculated load value: (Calculated load value in the freeze frame data) x (1 ±0.1) [%]
Engine coolant temperature (T) condition:

When the freeze frame data shows lower than 70 °C (158 °F), T should be lower than 70 °C (158 °F).

When the freeze frame data shows higher than or equal to 70 °C (158 °F), T should be higher than or equal
to 70 °C (158 °F).
Example:
If the stored freeze frame data is as follows:
Engine speed: 850 rpm, Calculated load value: 30%, Engine coolant temperature: 80 °C (176 °F)
To be satisfied with driving pattern C, the vehicle should run under the following conditions:
Engine speed: 475 - 1,225 rpm, Calculated load value: 27 - 33%, Engine coolant temperature: more than 70 °C
(158 °F)

The C counter will be cleared when the malfunction is detected regardless of vehicle conditions above.

The C counter will be counted up when vehicle conditions above is satisfied without the same malfunction.

The DTC will not be displayed after C counter reaches 80.

The 1st trip DTC will be cleared when C counter is counted once without the same malfunction after DTC
is stored in ECM.