Index Manuals Nissan Pathfinder (2008 year) - Service and Repair Manual

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Nissan Pathfinder (2008 year). Manual - part 292

ECM

EC-453

< ECU DIAGNOSIS >

[VQ40DE]

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DTC Index

INFOID:0000000001366435

EMISSION-RELATED DIAGNOSTIC INFORMATION ITEMS

×

: Applicable

—: Not applicable

Items

(CONSULT-III screen terms)

DTC*

1

SRT code

Trip

MIL

Reference

page

CONSULT-III

GST*

2

ECM*

3

CAN COMM CIRCUIT

U1000

1000*

5

—

1

×

CAN COMM CIRCUIT

U1001

1001*

5

—

2

—

CONTROL UNIT (CAN)

U1010

1010

—

1

×

NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.

P0000

0000

—

—

Flashing*

7

INT/V TIM CONT-B1

P0011

0011

—

2

×

INT/V TIM CONT-B2

P0021

0021

—

2

×

A/F SEN1 HTR (B1)

P0031

0031

—

2

×

A/F SEN1 HTR (B1)

P0032

0032

—

2

×

HO2S2 HTR (B1)

P0037

0037

—

2

×

HO2S2 HTR (B1)

P0038

0038

—

2

×

A/F SEN1 HTR (B2)

P0051

0051

—

2

×

A/F SEN1 HTR (B2)

P0052

0052

—

2

×

HO2S2 HTR (B2)

P0057

0057

—

2

×

HO2S2 HTR (B2)

P0058

0058

—

2

×

INT/V TIM V/CIR-B1

P0075

0075

—

2

×

INT/V TIM V/CIR-B2

P0081

0081

—

2

×

MAF SEN/CIRCUIT-B1

P0101

0101

—

2

×

MAF SEN/CIRCUIT-B1

P0102

0102

—

1

×

MAF SEN/CIRCUIT-B1

P0103

0103

—

1

×

IAT SEN/CIRCUIT-B1

P0112

0112

—

2

×

IAT SEN/CIRCUIT-B1

P0113

0113

—

2

×

ECT SEN/CIRC

P0117

0117

—

1

×

ECT SEN/CIRC

P0118

0118

—

1

×

TP SEN 2/CIRC-B1

P0122

0122

—

1

×

TP SEN 2/CIRC-B1

P0123

0123

—

1

×

ECT SENSOR

P0125

0125

—

2

×

IAT SENSOR-B1

P0127

0127

—

2

×

THERMSTAT FNCTN

P0128

0128

—

2

×

A/F SENSOR1 (B1)

P0130

0130

—

2

×

A/F SENSOR1 (B1)

P0131

0131

—

2

×

A/F SENSOR1 (B1)

P0132

0132

—

2

×

A/F SENSOR1 (B1)

P0133

0133

×

2

×

HO2S2 (B1)

P0137

0137

×

2

×

HO2S2 (B1)

P0138

0138

×

2

×

HO2S2 (B1)

P0139

0139

×

2

×

A/F SENSOR1 (B2)

P0150

0150

—

2

×

A/F SENSOR1 (B2)

P0151

0151

—

2

×

EC-454

< ECU DIAGNOSIS >

[VQ40DE]

ECM

A/F SENSOR1 (B2)

P0152

0152

—

2

×

A/F SENSOR1 (B2)

P0153

0153

×

2

×

HO2S2 (B2)

P0157

0157

×

2

×

HO2S2 (B2)

P0158

0158

×

2

×

HO2S2 (B2)

P0159

0159

×

2

×

FUEL SYS-LEAN-B1

P0171

0171

—

2

×

FUEL SYS-RICH-B1

P0172

0172

—

2

×

FUEL SYS-LEAN-B2

P0174

0174

—

2

×

FUEL SYS-RICH-B2

P0175

0175

—

2

×

FTT SENSOR

P0181

0181

—

2

×

FTT SEN/CIRCUIT

P0182

0182

—

2

×

FTT SEN/CIRCUIT

P0183

0183

—

2

×

TP SEN 1/CIRC-B1

P0222

0222

—

1

×

TP SEN 1/CIRC-B1

P0223

0223

—

1

×

MULTI CYL MISFIRE

P0300

0300

—

2

×

CYL 1 MISFIRE

P0301

0301

—

2

×

CYL 2 MISFIRE

P0302

0302

—

2

×

CYL 3 MISFIRE

P0303

0303

—

2

×

CYL 4 MISFIRE

P0304

0304

—

2

×

CYL 5 MISFIRE

P0305

0305

—

2

×

CYL 6 MISFIRE

P0306

0306

—

2

×

KNOCK SEN/CIRC-B1

P0327

0327

—

2

—

KNOCK SEN/CIRC-B1

P0328

0328

—

2

—

KNOCK SEN/CIRC-B2

P0332

0332

—

2

—

KNOCK SEN/CIRC-B2

P0333

0333

—

2

—

CKP SEN/CIRCUIT

P0335

0335

—

2

×

CMP SEN/CIRC-B1

P0340

0340

—

2

×

CMP SEN/CIRC-B2

P0345

0345

—

2

×

TW CATALYST SYS-B1

P0420

0420

×

2

×

TW CATALYST SYS-B2

P0430

0430

×

2

×

EVAP PURG FLOW/MON

P0441

0441

×

2

×

EVAP SMALL LEAK

P0442

0442

×

2

×

PURG VOLUME CONT/V

P0443

0443

—

2

×

PURG VOLUME CONT/V

P0444

0444

—

2

×

PURG VOLUME CONT/V

P0445

0445

—

2

×

VENT CONTROL VALVE

P0447

0447

—

2

×

VENT CONTROL VALVE

P0448

0448

—

2

×

EVAP SYS PRES SEN

P0451

0451

—

2

×

EVAP SYS PRES SEN

P0452

0452

—

2

×

EVAP SYS PRES SEN

P0453

0453

—

2

×

EVAP GROSS LEAK

P0455

0455

—

2

×

EVAP VERY SML LEAK

P0456

0456

×

*

4

2

×

Items

(CONSULT-III screen terms)

DTC*

1

SRT code

Trip

MIL

Reference

page

CONSULT-III

GST*

2

ECM*

3

ECM

EC-455

< ECU DIAGNOSIS >

[VQ40DE]

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FUEL LEV SEN SLOSH

P0460

0460

—

2

×

FUEL LEVEL SENSOR

P0461

0461

—

2

×

FUEL LEVL SEN/CIRC

P0462

0462

—

2

×

FUEL LEVEL SEN/CIRC

P0463

0463

—

2

×

VEH SPEED SEN/CIRC*

6

P0500

0500

—

2

×

ISC SYSTEM

P0506

0506

—

2

×

ISC SYSTEM

P0507

0507

—

2

×

PW ST P SEN/CIRC

P0550

0550

—

2

—

ECM BACK UP/CIRCUIT

P0603

0603

—

2

×

ECM

P0605

0605

—

1 or 2

×

or —

SENSOR POWER/CIRCUIT

P0643

0643

—

1

×

TCM

P0700

0700

—

1

×

PNP SW/CIRC

P0705

0705

—

2

×

ATF TEMP SEN/CIRC

P0710

0710

—

2

×

TURBINE SENSOR

P0717

0717

—

2

×

VEH SPD SEN/CIR AT*

6

P0720

0720

—

2

×

A/T 1ST GR FNCTN

P0731

0731

—

2

×

A/T 2ND GR FNCTN

P0732

0732

—

2

×

A/T 3RD GR FNCTN

P0733

0733

—

2

×

A/T 4TH GR FNCTN

P0734

0734

—

2

×

A/T 5TH GR FNCTN

P0735

0735

—

2

×

TCC SOLENOID/CIRC

P0740

0740

—

2

×

A/T TCC S/V FNCTN

P0744

0744

—

2

×

L/PRESS SOL/CIRC

P0745

0745

—

2

×

P-N POS SW/CIRCUIT

P0850

0850

—

2

×

CLOSED LOOP-B1

P1148

1148

—

1

×

CLOSED LOOP-B2

P1168

1168

—

1

×

TCS C/U FUNCTN

P1211

1211

—

2

—

TCS/CIRC

P1212

1212

—

2

—

ENG OVER TEMP

P1217

1217

—

1

×

CTP LEARNING-B1

P1225

1225

—

2

—

CTP LEARNING-B1

P1226

1226

—

2

—

COLD START CONTROL

P1421

1421

—

2

×

BAT CURRENT SENSOR

P1550

1550

—

2

—

BAT CURRENT SENSOR

P1551

1551

—

2

—

BAT CURRENT SENSOR

P1552

1552

—

2

—

BAT CURRENT SENSOR

P1553

1553

—

2

—

BAT CURRENT SENSOR

P1554

1554

—

2

—

ASCD SW

P1564

1564

—

1

—

ASCD BRAKE SW

P1572

1572

—

1

—

ASCD VHL SPD SEN

P1574

1574

—

1

—

Items

(CONSULT-III screen terms)

DTC*

1

SRT code

Trip

MIL

Reference

page

CONSULT-III

GST*

2

ECM*

3

EC-456

< ECU DIAGNOSIS >

[VQ40DE]

ECM

*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.

*5: The troubleshooting for this DTC need CONSULT-III.

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

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

Emission-related Diagnostic Information

INFOID:0000000001376546

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.

LOCK MODE

P1610

1610

—

2

—

or

ID DISCARD IMM-ECM

P1611

1611

—

2

—

or

CHAIN OF ECM-IMMU

P1612

1612

—

2

—

or

CHAIN OF IMMU-KEY

P1614

1614

—

2

—

or

DIFFERENCE OF KEY

P1615

1615

—

2

—

or

IN PLUY SPEED

P1715

1715

—

2

—

A/T INTERLOCK

P1730

1730

—

1

×

I/C SOLENOID/CIRC

P1752

1752

—

1

×

FR/B SOLENOID/CIRC

P1757

1757

—

1

×

D/C SOLENOID/CIRC

P1762

1762

—

1

×

HLR/C SOL/CIRC

P1767

1767

—

1

×

LC/B SOLENOID/CIRC

P1772

1772

—

1

×

LC/B SOLENOID FNCT

P1774

1774

—

1

×

VIAS S/V-1

P1800

1800

—

2

—

BRAKE SW/CIRCUIT

P1805

1805

—

2

—

ETC MOT PWR-B1

P2100

2100

—

1

×

ETC FUNCTION/CIRC-B1

P2101

2101

—

1

×

ETC MOT PWR

P2103

2103

—

1

×

ETC MOT-B1

P2118

2118

—

1

×

ETC ACTR-B1

P2119

2119

—

1

×

APP SEN 1/CIRC

P2122

2122

—

1

×

APP SEN 1/CIRC

P2123

2123

—

1

×

APP SEN 2/CIRC

P2127

2127

—

1

×

APP SEN 2/CIRC

P2128

2128

—

1

×

TP SENSOR-B1

P2135

2135

—

1

×

APP SENSOR

P2138

2138

—

1

×

A/F SENSOR1 (B1)

P2A00

2A00

—

2

×

A/F SENSOR1 (B2)

P2A03

2A03

—

2

×

Items

(CONSULT-III screen terms)

DTC*

1

SRT code

Trip

MIL

Reference

page

CONSULT-III

GST*

2

ECM*

3

ECM

EC-457

< ECU DIAGNOSIS >

[VQ40DE]

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EC

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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 2, refer to

EC-14, "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-74, "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
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.

EC-458

< ECU DIAGNOSIS >

[VQ40DE]

ECM

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”.

*1: If completion of several SRTs is required, perform driving patterns (DTC confirmation procedure), one by one based on the priority for
models with CONSULT-III.

Priority

Items

1

Freeze frame data

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

2

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

3

1st trip freeze frame data

SRT item

(CONSULT-III indica-

tion)

Perfor-

mance Pri-

ority*1

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

Corresponding DTC No.

CATALYST

2

Three way catalyst function

P0420, P0430

EVAP SYSTEM

2

EVAP control system purge flow monitoring

P0441

1

EVAP control system

P0442

2

EVAP control system

P0456

HO2S

1

Air fuel ratio (A/F) sensor 1

P0133, P0153

Heated oxygen sensor 2

P0137, P0157

Heated oxygen sensor 2

P0138, P0158

Heated oxygen sensor 2

P0139, P0159

ECM

EC-459

< ECU DIAGNOSIS >

[VQ40DE]

C

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EC

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SRT Set Timing

SRT is set as “CMPLT” after self-diagnosis has been performed one or more times. Completion of SRT is
done regardless of whether the result is OK or NG. The set timing is different between OK and NG results and
is shown in the table below.

OK: Self-diagnosis is carried out and the result is OK.

NG: Self-diagnosis is carried out and the result is NG.

—: Self-diagnosis is not carried out.

When all SRT related self-diagnoses showed OK results in a single cycle (Ignition OFF-ON-OFF), the SRT will
indicate “CMPLT”.

→

Case 1 above

When all SRT related self-diagnoses showed OK results through several different cycles, the SRT will indicate
“CMPLT” at the time the respective self-diagnoses have at least one OK result.

→

Case 2 above

If one or more SRT related self-diagnoses showed NG results in 2 consecutive cycles, the SRT will also indi-
cate “CMPLT”.

→

Case 3 above

The table above shows that the minimum number of cycles for setting SRT as “INCMP” is one (1) for each
self-diagnosis (Case 1 & 2) or two (2) for one of self-diagnoses (Case 3). However, in preparation for the state
emissions inspection, it is unnecessary for each self-diagnosis to be executed twice (Case 3) for the following
reasons:
• The SRT will indicate “CMPLT” at the time the respective self-diagnoses have one (1) OK result.
• The emissions inspection requires “CMPLT” of the SRT only with OK self-diagnosis results.
• When, during SRT driving pattern, 1st trip DTC (NG) is detected prior to “CMPLT” of SRT, the self-diagnosis

memory must be erased from ECM after repair.

• If the 1st trip DTC is erased, all the SRT will indicate “INCMP”.

NOTE:
SRT can be set as “CMPLT” together with the DTC(s). Therefore, DTC check must always be carried out
prior to the state emission inspection even though the SRT indicates “CMPLT”.

SRT Service Procedure

If a vehicle has failed the state emissions inspection due to one or more SRT items indicating “INCMP”, review
the flowchart diagnostic sequence on the next page.

Self-diagnosis result

Example

Diagnosis

Ignition cycle

←

ON

→

OFF

←

ON

→

OFF

←

ON

→

OFF

←

ON

→

All OK

Case 1

P0400

OK (1)

— (1)

OK (2)

— (2)

P0402

OK (1)

— (1)

— (1)

OK (2)

P1402

OK (1)

OK (2)

— (2)

— (2)

SRT of EGR

“CMPLT”

“CMPLT”

“CMPLT”

“CMPLT”

Case 2

P0400

OK (1)

— (1)

— (1)

— (1)

P0402

— (0)

— (0)

OK (1)

— (1)

P1402

OK (1)

OK (2)

— (2)

— (2)

SRT of EGR

“INCMP”

“INCMP”

“CMPLT”

“CMPLT”

NG exists

Case 3

P0400

OK

OK

—

—

P0402

—

—

—

—

P1402

NG

—

NG

NG

(Consecutive

NG)

(1st trip)

DTC

1st trip DTC

—

1st trip DTC

DTC

(= MIL ON)

SRT of EGR

“INCMP”

“INCMP”

“INCMP”

“CMPLT”

EC-460

< ECU DIAGNOSIS >

[VQ40DE]

ECM

How to Display SRT Status

WITH CONSULT-III

Selecting “SRT STATUS” in “DTC & SRT CONFIRMATION” mode with CONSULT-III.
For items whose SRT codes are set, a “CMPLT” is displayed on the CONSULT-III screen; for items whose
SRT codes are not set, “INCMP” is displayed.
NOTE:
Though displayed on the CONSULT-III screen, “HO2S HTR” is not SRT item.

WITH GST

Selecting Service $01 with GST (Generic Scan Tool)

NO TOOLS

A SRT code itself can no be displayed while only SRT status can be.
1.

Turn ignition switch ON and wait 20 seconds.

2.

SRT status is indicated as shown below.
• When all SRT codes are set, MIL lights up continuously.

*1

"How to Read DTC and 1st Trip DTC" *2

"How to Display SRT Status"

*3

"How to Set SRT Code"

PBIB2320E

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