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Infiniti FX35 / FX45. Manual - part 324

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-57

< SERVICE INFORMATION >

[VQ35DE]

VENT CONTROL VALVE

P0447

0447

—

EC-361

VENT CONTROL VALVE

P0448

0448

—

EC-366

EVAP SYS PRES SEN

P0451

0451

—

EC-372

EVAP SYS PRES SEN

P0452

0452

—

EC-375

EVAP SYS PRES SEN

P0453

0453

—

EC-381

EVAP GROSS LEAK

P0455

0455

—

EC-388

EVAP VERY SML LEAK

P0456

0456

EC-394

FUEL LEV SEN SLOSH

P0460

0460

—

EC-401

FUEL LEVEL SENSOR

P0461

0461

—

EC-403

FUEL LEVL SEN/CIRC

P0462

0462

—

EC-405

FUEL LEVL SEN/CIRC

P0463

0463

—

EC-405

VEH SPEED SEN/CIRC*

P0500

0500

—

EC-407

ISC SYSTEM

P0506

0506

—

EC-409

ISC SYSTEM

P0507

0507

—

EC-411

PW ST P SEN/CIRC

P0550

0550

—

EC-413

ECM BACK UP/CIRCUIT

P0603

0603

—

EC-418

ECM

P0605

0605

—

1 or 2

or —

EC-422

SENSOR POWER/CIRC

P0643

0643

—

EC-424

TCM

P0700

0700

—

AT-101

PNP SW/CIRC

P0705

0705

—

AT-102

ATF TEMP SEN/CIRC

P0710

0710

—

AT-132

TURBINE SENSOR

P0717

0717

—

AT-106

VEH SPD SEN/CIR AT*

P0720

0720

—

AT-108

A/T 1ST GR FNCTN

P0731

0731

—

AT-114

A/T 2ND GR FNCTN

P0732

0732

—

AT-116

A/T 3RD GR FNCTN

P0733

0733

—

AT-118

A/T 4TH GR FNCTN

P0734

0734

—

AT-120

A/T 5TH GR FNCTN

P0735

0735

—

AT-122

TCC SOLENOID/CIRC

P0740

0740

—

AT-124

A/T TCC S/V FNCTN

P0744

0744

—

AT-126

L/PRESS SOL/CIRC

P0745

0745

—

AT-128

P-N POS SW/CIRCUIT

P0850

0850

—

EC-429

CLOSED LOOP-B1

P1148

1148

—

EC-434

CLOSED LOOP-B2

P1168

1168

—

EC-434

TCS C/U FUNCTN

P1211

1211

—

EC-435

TCS/CIRC

P1212

1212

—

EC-436

ENG OVER TEMP

P1217

1217

—

EC-437

CTP LEARNING-B1

P1225

1225

—

EC-447

CTP LEARNING-B1

P1226

1226

—

EC-449

COLD START CONTROL

P1421

1421

—

EC-451

Items

(CONSULT-III screen terms)

DTC*

SRT code

Trip

MIL

Reference

page

CONSULT-III

GST*

ECM*

EC-58

< SERVICE INFORMATION >

[VQ35DE]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

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

*2: This number is prescribed by SAE J2012.

*3: In Diagnostic Test Mode II (Self-diagnostic results), this number is controlled by NISSAN.

*4: SRT code will not be set if the self-diagnostic result is NG.

ASCD SW

P1564

1564

—

els with ICC)

els with AS-

CD)

ICC COMMAND VALUE*

P1568

1568

—

EC-464

ASCD BRAKE SW

P1572

1572

—

els with ICC)

els with AS-

CD)

ASCD VHL SPD SEN

P1574

1574

—

els with ICC)

els with AS-

CD)

LOCK MODE

P1610

1610

—

BL-4

ID DISCARD IMM-ECM

P1611

1611

—

BL-4

CHAIN OF ECM-IMMU

P1612

1612

—

BL-4

CHAIN OF IMMU-KEY

P1614

1614

—

BL-4

DIFFERENCE OF KEY

P1615

1615

—

BL-4

IN PULLY SPEED

P1715

1715

—

EC-485

A/T INTERLOCK

P1730

1730

—

AT-139

I/C SOLENOID/CIRC

P1752

1752

—

AT-143

FR/B SOLENOID/CIRC

P1757

1757

—

AT-145

D/C SOLENOID/CIRC

P1762

1762

—

AT-147

HLR/C SOL/CIRC

P1767

1767

—

AT-149

LC/B SOLENOID/CIRC

P1772

1772

—

AT-151

LC/B SOLENOID FNCT

P1774

1774

—

AT-153

BRAKE SW/CIRCUIT

P1805

1805

—

EC-486

ETC MOT PWR-B1

P2100

2100

—

EC-490

ETC FNCTN/CIRC-B1

P2101

2101

—

EC-494

ETC MOT PWR

P2103

2103

—

EC-490

ETC MOT-B1

P2118

2118

—

EC-500

ETC ACTR-B1

P2119

2119

—

EC-504

APP SEN 1/CIRC

P2122

2122

—

EC-506

APP SEN 1/CIRC

P2123

2123

—

EC-506

APP SEN 2/CIRC

P2127

2127

—

EC-512

APP SEN 2/CIRC

P2128

2128

—

EC-512

TP SENSOR-B1

P2135

2135

—

EC-518

APP SENSOR

P2138

2138

—

EC-524

A/F SENSOR1 (B1)

P2A00

2A00

—

EC-532

A/F SENSOR1 (B2)

P2A03

2A03

—

EC-532

Items

(CONSULT-III screen terms)

DTC*

SRT code

Trip

MIL

Reference

page

CONSULT-III

GST*

ECM*

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-59

< SERVICE INFORMATION >

[VQ35DE]

*5: The trouble shooting for this DTC needs CONSULT-III.

*6: When the fail-safe operations for both self-diagnoses occur, the MIL illuminates.

*7: For models with ICC system.

*8: When the ECM is in the mode of displaying SRT status, MIL may flash. For the details, refer to “How to Display SRT Status”.

DTC AND 1ST TRIP DTC

The 1st trip DTC (whose number is the same as the DTC number) is displayed for the latest self-diagnostic
result obtained. If the ECM memory was cleared previously, and the 1st trip DTC did not reoccur, the 1st trip
DTC will not be displayed.
If a malfunction is detected during the 1st trip, the 1st trip DTC is stored in the ECM memory. The MIL will not
light up (two trip detection logic). If the same malfunction is not detected in the 2nd trip (meeting the required
driving pattern), the 1st trip DTC is cleared from the ECM memory. If the same malfunction is detected in the
2nd trip, both the 1st trip DTC and DTC are stored in the ECM memory and the MIL lights up. In other words,
the DTC is stored in the ECM memory and the MIL lights up when the same malfunction occurs in two consec-
utive trips. If a 1st trip DTC is stored and a non-diagnostic operation is performed between the 1st and 2nd
trips, only the 1st trip DTC will continue to be stored. For malfunctions that blink or light up the MIL during the
1st trip, the DTC and 1st trip DTC are stored in the ECM memory.
Procedures for clearing the DTC and the 1st trip DTC from the ECM memory are described in “HOW TO
ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION”.
For malfunctions in which 1st trip DTCs are displayed, refer to “EMISSION-RELATED DIAGNOSTIC INFOR-
MATION ITEMS”. These items are required by legal regulations to continuously monitor the system/compo-
nent. In addition, the items monitored non-continuously are also displayed on CONSULT-III.
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-89, "Trouble Diagnosis Introduction"

. Then per-

form DTC Confirmation Procedure or Overall Function Check to try to duplicate the malfunction. If the mal-
function is duplicated, 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-III
With GST

CONSULT-III or GST (Generic Scan Tool) Examples: P0340, P0850, P1148, etc.
These DTCs are prescribed by SAE J2012.
(CONSULT-III 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, 0850, 1148, 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-III can identify malfunction status as shown below. Therefore, using CONSULT-III (if
available) is recommended.

DTC or 1st trip DTC of a malfunction is displayed in SELF-DIAGNOSTIC RESULTS mode of CONSULT-III.
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, absolute throttle position, 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-III or
GST. The 1st trip freeze frame data can only be displayed on the CONSULT-III screen, not on the GST. For
details, see

EC-117, "CONSULT-III Function (ENGINE)"

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

EC-60

< SERVICE INFORMATION >

[VQ35DE]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

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.

For example, the EGR malfunction (Priority: 2) was detected and the freeze frame data was stored in the 2nd
trip. After that when the misfire (Priority: 1) is detected in another trip, the freeze frame data will be updated
from the EGR malfunction to the misfire. The 1st trip freeze frame data is updated each time a different mal-
function is detected. There is no priority for 1st trip freeze frame data. However, once freeze frame data is
stored in the ECM memory, 1st trip freeze data is no longer stored (because only one freeze frame data or 1st
trip freeze frame data can be stored in the ECM). If freeze frame data is stored in the ECM memory and freeze
frame data with the same priority occurs later, the first (original) freeze frame data remains unchanged in the
ECM memory.
Both 1st trip freeze frame data and freeze frame data (along with the DTCs) are cleared when the ECM mem-
ory is erased. Procedures for clearing the ECM memory are described in “HOW TO ERASE EMISSION-
RELATED DIAGNOSTIC INFORMATION”.

SYSTEM READINESS TEST (SRT) CODE

System Readiness Test (SRT) code is specified in Service $01 of SAE J1979.
As part of an enhanced emissions test for Inspection & Maintenance (I/M), certain states require the status of
SRT be used to indicate whether the ECM has completed self-diagnosis of major emission systems and com-
ponents. Completion must be verified in order for the emissions inspection to proceed.
If a vehicle is rejected for a State emissions inspection due to one or more SRT items indicating “INCMP”, use
the information in this Service Manual to set the SRT to “CMPLT”.
In most cases the ECM will automatically complete its self-diagnosis cycle during normal usage, and the SRT
status will indicate “CMPLT” for each application system. Once set as “CMPLT”, the SRT status remains
“CMPLT” until the self-diagnosis memory is erased.
Occasionally, certain portions of the self-diagnostic test may not be completed as a result of the customer's
normal driving pattern; the SRT will indicate “INCMP” for these items.
NOTE:
The SRT will also indicate “INCMP” if the self-diagnosis memory is erased for any reason or if the ECM mem-
ory power supply is interrupted for several hours.
If, during the state emissions inspection, the SRT indicates “CMPLT” for all test items, the inspector will con-
tinue with the emissions test. However, if the SRT indicates “INCMP” for one or more of the SRT items the
vehicle is returned to the customer untested.
NOTE:
If MIL is ON during the state emissions inspection, the vehicle is also returned to the customer untested even
though the SRT indicates “CMPLT” for all test items. Therefore, it is important to check SRT (“CMPLT”) and
DTC (No DTCs) before the inspection.

SRT Item

The table below shows required self-diagnostic items to set the SRT to “CMPLT”.

Priority

Items

Freeze frame data

Misfire — DTC: P0300 - P0306
Fuel Injection System Function — DTC: P0171, P0172, P0174, P0175

Except the above items (Includes A/T related items)

1st trip freeze frame data

SRT item

(CONSULT-III indica-

tion)

Perfor-

mance Pri-

ority*

Required self-diagnostic items to set the SRT to “CMPLT”

Corresponding DTC No.

CATALYST

Three way catalyst function

P0420, P0430

EVAP SYSTEM

EVAP control system

P0442

EVAP control system

P0456

EVAP control system purge flow monitoring

P0441

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