Index Manuals Nissan Pathfinder (2010 year) - Service and Repair Manual

Search copyright infringement

Content .. 294 295 296 297 ..

Nissan Pathfinder (2010 year). Manual - part 296

EC-460

< ECU DIAGNOSIS >

[VQ40DE]

ECM

DTC Inspection Priority Chart

INFOID:0000000005257461

If some DTCs are displayed at the same time, perform inspections one by one based on the following priority

chart.

NOTE:

•

If DTC UXXXX is displayed with other DTC, first perform the trouble diagnosis for DTC UXXXX.

•

If DTC P0607 is displayed with other DTC, first perform the trouble diagnosis for DTC P0607. Refer to

EC-308, "Description"

.

Priority

Detected items (DTC)

1

• U0101 U1001 CAN communication line
• P0101 P0102 P0103 Mass air flow sensor
• P0112 P0113 P0127 Intake air temperature sensor
• P0116 P0117 P0118 P0125 Engine coolant temperature sensor
• P0122 P0123 P0222 P0223 P1225 P1226 P2135 Throttle position sensor
• P0128 Thermostat function
• P0181 P0182 P0183 Fuel tank temperature sensor
• P0327 P0328 P0332 P0333 Knock sensor
• P0335 Crankshaft position sensor (POS)
• P0340 P0345 Camshaft position sensor (PHASE)
• P0460 P0461 P0462 P0463 Fuel level sensor
• P0500 Vehicle speed sensor
• P0605 P607 ECM
• P0643 Sensor power supply
• P0700 TCM
• P0705 Transmission range switch
• P0850 Park/Neutral position (PNP) switch
• P1550 P1551 P1552 P1553 P1554 Battery current sensor
• P1610 - P1615 NATS
• P2122 P2123 P2127 P2128 P2138 Accelerator pedal position sensor

2

• P0031 P0032 P0051 P0052 Air fuel ratio (A/F) sensor 1 heater
• P0037 P0038 P0057 P0058 Heated oxygen sensor 2 heater
• P0075 P0081 Intake valve timing control solenoid valve
• P0130 P0131 P0132 P0133 P0150 P0151 P0152 P0153 P2A00 P2A03 Air fuel ratio (A/F) sensor 1
• P0137 P0138 P0139 P0157 P0158 P0159 Heated oxygen sensor 2
• P0441 EVAP control system purge flow monitoring
• P0443 P0444 P0445 EVAP canister purge volume control solenoid valve
• P0447 P0448 EVAP canister vent control valve
• P0451 P0452 P0453 EVAP control system pressure sensor
• P0550 Power steering pressure sensor
• P0603 ECM power supply
• P0710 P0717 P0720 P0731 P0732 P0733 P0734 P0735 P0740 P0744 P0745 P1730 P1752 P1757 P1762 P1767

P1772 P1774 A/T related sensors, solenoid valves and switches

• P1217 Engine over temperature (OVERHEAT)
• P1800 VIAS control solenoid valve
• P1805 Brake switch
• P2100 P2103 P2118 Electric throttle control actuator
• P2101 Electric throttle control function

3

• P0011 P0021 Intake valve timing control
• P0171 P0172 P0174 P0175 Fuel injection system function
• P0300 - P0306 Misfire
• P0420 P0430 Three way catalyst function
• P0442 P0455 P0456 EVAP control system
• P0506 P0507 Idle speed control system
• P050E Cold start control
• P1148 P1168 Closed loop control
• P1211 TCS control unit
• P1212 TCS communication line
• P1564 ASCD steering switch
• P1572 ASCD brake switch
• P1574 ASCD vehicle speed sensor
• P2119 Electric throttle control actuator

2010 Pathfinder

ECM

EC-461

< ECU DIAGNOSIS >

[VQ40DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

DTC Index

INFOID:0000000005257462

EMISSION-RELATED DIAGNOSTIC INFORMATION ITEMS

×

: Applicable —: Not applicable

Items

(CONSULT-III screen terms)

DTC*

1

SRT

code

Trip

MIL

Permanent

DTC group*

4

Reference

page

CONSULT-III

GST*

2

ECM*

3

LOST COMM (TCM)

U0101

0101*

5

—

1

×

B

CAN COMM CIRCUIT

U1001

1001*

5

—

2

—

—

NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.

P0000

0000

—

—

Blinking

*

6

—

INT/V TIM CONT-B1

P0011

0011

×

2

×

B

INT/V TIM CONT-B2

P0021

0021

×

2

×

B

A/F SEN1 HTR (B1)

P0031

0031

—

2

×

B

A/F SEN1 HTR (B1)

P0032

0032

—

2

×

B

HO2S2 HTR (B1)

P0037

0037

—

2

×

B

HO2S2 HTR (B1)

P0038

0038

—

2

×

B

A/F SEN1 HTR (B2)

P0051

0051

—

2

×

B

A/F SEN1 HTR (B2)

P0052

0052

—

2

×

B

HO2S2 HTR (B2)

P0057

0057

—

2

×

B

HO2S2 HTR (B2)

P0058

0058

—

2

×

B

INT/V TIM V/CIR-B1

P0075

0075

—

2

×

B

INT/V TIM V/CIR-B2

P0081

0081

—

2

×

B

MAF SEN/CIRCUIT-B1

P0101

0101

—

2

×

B

MAF SEN/CIRCUIT-B1

P0102

0102

—

1

×

B

MAF SEN/CIRCUIT-B1

P0103

0103

—

1

×

B

IAT SEN/CIRCUIT-B1

P0112

0112

—

2

×

B

IAT SEN/CIRCUIT-B1

P0113

0113

—

2

×

B

ECT SEN/CIRC

P0116

0116

—

2

×

B

ECT SEN/CIRC

P0117

0117

—

1

×

B

ECT SEN/CIRC

P0118

0118

—

1

×

B

TP SEN 2/CIRC-B1

P0122

0122

—

1

×

B

TP SEN 2/CIRC-B1

P0123

0123

—

1

×

B

ECT SENSOR

P0125

0125

—

2

×

B

IAT SENSOR-B1

P0127

0127

—

2

×

B

THERMSTAT FNCTN

P0128

0128

—

2

×

B

A/F SENSOR1 (B1)

P0130

0130

—

2

×

A

A/F SENSOR1 (B1)

P0131

0131

—

2

×

B

A/F SENSOR1 (B1)

P0132

0132

—

2

×

B

A/F SENSOR1 (B1)

P0133

0133

×

2

×

A

HO2S2 (B1)

P0137

0137

×

2

×

A

HO2S2 (B1)

P0138

0138

×

2

×

A

HO2S2 (B1)

P0139

0139

×

2

×

A

A/F SENSOR1 (B2)

P0150

0150

—

2

×

A

A/F SENSOR1 (B2)

P0151

0151

—

2

×

B

2010 Pathfinder

EC-462

< ECU DIAGNOSIS >

[VQ40DE]

ECM

A/F SENSOR1 (B2)

P0152

0152

—

2

×

B

A/F SENSOR1 (B2)

P0153

0153

×

2

×

A

HO2S2 (B2)

P0157

0157

×

2

×

A

HO2S2 (B2)

P0158

0158

×

2

×

A

HO2S2 (B2)

P0159

0159

×

2

×

A

FUEL SYS-LEAN-B1

P0171

0171

—

2

×

B

FUEL SYS-RICH-B1

P0172

0172

—

2

×

B

FUEL SYS-LEAN-B2

P0174

0174

—

2

×

B

FUEL SYS-RICH-B2

P0175

0175

—

2

×

B

FTT SENSOR

P0181

0181

—

2

×

B

FTT SEN/CIRCUIT

P0182

0182

—

2

×

B

FTT SEN/CIRCUIT

P0183

0183

—

2

×

B

TP SEN 1/CIRC-B1

P0222

0222

—

1

×

B

TP SEN 1/CIRC-B1

P0223

0223

—

1

×

B

MULTI CYL MISFIRE

P0300

0300

—

1 or 2

×

B

CYL 1 MISFIRE

P0301

0301

—

1 or 2

×

B

CYL 2 MISFIRE

P0302

0302

—

1 or 2

×

B

CYL 3 MISFIRE

P0303

0303

—

1 or 2

×

B

CYL 4 MISFIRE

P0304

0304

—

1 or 2

×

B

CYL 5 MISFIRE

P0305

0305

—

1 or 2

×

B

CYL 6 MISFIRE

P0306

0306

—

1 or 2

×

B

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

×

B

CMP SEN/CIRC-B1

P0340

0340

—

2

×

B

CMP SEN/CIRC-B2

P0345

0345

—

2

×

B

TW CATALYST SYS-B1

P0420

0420

×

2

×

A

TW CATALYST SYS-B2

P0430

0430

×

2

×

A

EVAP PURG FLOW/MON

P0441

0441

×

2

×

A

EVAP SMALL LEAK

P0442

0442

×

2

×

A

PURG VOLUME CONT/V

P0443

0443

—

2

×

A

PURG VOLUME CONT/V

P0444

0444

—

2

×

B

PURG VOLUME CONT/V

P0445

0445

—

2

×

B

VENT CONTROL VALVE

P0447

0447

—

2

×

B

VENT CONTROL VALVE

P0448

0448

—

2

×

B

EVAP SYS PRES SEN

P0451

0451

—

2

×

A

EVAP SYS PRES SEN

P0452

0452

—

2

×

B

EVAP SYS PRES SEN

P0453

0453

—

2

×

B

EVAP GROSS LEAK

P0455

0455

—

2

×

A

EVAP VERY SML LEAK

P0456

0456

×

*

7

2

×

A

Items

(CONSULT-III screen terms)

DTC*

1

SRT

code

Trip

MIL

Permanent

DTC group*

4

Reference

page

CONSULT-III

GST*

2

ECM*

3

2010 Pathfinder

ECM

EC-463

< ECU DIAGNOSIS >

[VQ40DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

FUEL LEV SEN SLOSH

P0460

0460

—

2

×

A

FUEL LEVEL SENSOR

P0461

0461

—

2

×

B

FUEL LEVL SEN/CIRC

P0462

0462

—

2

×

B

FUEL LEVEL SEN/CIRC

P0463

0463

—

2

×

B

VEH SPEED SEN/CIRC

P0500

0500

—

2

×

B

ISC SYSTEM

P0506

0506

—

2

×

B

ISC SYSTEM

P0507

0507

—

2

×

B

COLD START CONTROL

P050E

050E

—

2

×

A

PW ST P SEN/CIRC

P0550

0550

—

2

—

—

ECM BACK UP/CIRCUIT

P0603

0603

—

2

×

B

ECM

P0605

0605

—

1 or 2

×

or —

B

ECM

P0607

0607

—

1

×

B

SENSOR POWER/CIRCUIT

P0643

0643

—

1

×

B

TRANSMISSION CONT

P0700

0700

—

1

×

B

T/M RANGE SENSOR A

P0705

0705

—

2

×

B

ATF TEMP SEN/CIRC*

8

P0710

0710

—

2

×

B

INPUT SPEED SENSOR A

P0717

0717

—

2

×

B

OUTPUT SPEED SENSOR

P0720

0720

—

2

×

B

1GR INCORRECT RATIO*

8

P0731

0731

—

2

×

B

2GR INCORRECT RATIO*

8

P0732

0732

—

2

×

B

3GR INCORRECT RATIO*

8

P0733

0733

—

2

×

B

4GR INCORRECT RATIO*

8

P0734

0734

—

2

×

B

5GR INCORRECT RATIO*

8

P0735

0735

—

2

×

B

TORQUE CONVERTER

P0740

0740

—

2

×

B

TORQUE CONVERTER

P0744

0744

—

2

×

B

PC SOLENOID A

P0745

0745

—

2

×

B

P-N POS SW/CIRCUIT

P0850

0850

—

2

×

B

CLOSED LOOP-B1

P1148

1148

—

1

×

A

CLOSED LOOP-B2

P1168

1168

—

1

×

A

TCS C/U FUNCTN

P1211

1211

—

2

—

—

TCS/CIRC

P1212

1212

—

2

—

—

ENG OVER TEMP

P1217

1217

—

1

×

B

CTP LEARNING-B1

P1225

1225

—

2

—

—

CTP LEARNING-B1

P1226

1226

—

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

—

—

Items

(CONSULT-III screen terms)

DTC*

1

SRT

code

Trip

MIL

Permanent

DTC group*

4

Reference

page

CONSULT-III

GST*

2

ECM*

3

2010 Pathfinder

EC-464

< ECU DIAGNOSIS >

[VQ40DE]

ECM

*1: 1st trip DTC No. is the same as DTC No.
*2: This number is prescribed by SAE J2012/ISO 15031-6.
*3: In Diagnostic Test Mode II (Self-diagnostic results), this number is controlled by NISSAN.
*4: Refer to

EC-53, "Emission-related Diagnostic Information"

, “PERMANENT DIAGNOSTIC TROUBLE CODE (PERMANENT DTC)”.

*5: The troubleshooting for this DTC need CONSULT-III.
*6: When the ECM is in the mode of that displays SRT status, MIL may blink. For the details, refer to "How to Display SRT Status".
*7: SRT code will not be set if the self-diagnostic result is NG.
*8: When erasing this DTC, always use CONSULT-III or GST.

Emission-related Diagnostic Information

INFOID:0000000005575646

DTC AND 1ST TRIP DTC

ASCD VHL SPD SEN

P1574

1574

—

1

—

—

LOCK MODE

P1610

1610

—

2

—

—

ID DISCARD IMM-ECM

P1611

1611

—

2

—

—

CHAIN OF ECM-IMMU

P1612

1612

—

2

—

—

CHAIN OF IMMU-KEY

P1614

1614

—

2

—

—

DIFFERENCE OF KEY

P1615

1615

—

2

—

—

IN PLUY SPEED

P1715

1715

—

2

—

—

INTERLOCK

P1730

1730

—

1

×

B

INPUT CLUTCH SOL

P1752

1752

—

1

×

B

FR BRAKE SOLENOID

P1757

1757

—

1

×

B

DRCT CLUTCH SOL

P1762

1762

—

1

×

B

HLR CLUTCH SOLENOID

P1767

1767

—

1

×

B

L C BRAKE SOLENOID

P1772

1772

—

1

×

B

L C BRAKE SOLENOID

P1774

1774

—

1

×

B

VIAS S/V-1

P1800

1800

—

2

—

—

BRAKE SW/CIRCUIT

P1805

1805

—

2

—

—

ETC MOT PWR-B1

P2100

2100

—

1

×

B

ETC FUNCTION/CIRC-B1

P2101

2101

—

1

×

B

ETC MOT PWR

P2103

2103

—

1

×

B

ETC MOT-B1

P2118

2118

—

1

×

B

ETC ACTR-B1

P2119

2119

—

1

×

B

APP SEN 1/CIRC

P2122

2122

—

1

×

B

APP SEN 1/CIRC

P2123

2123

—

1

×

B

APP SEN 2/CIRC

P2127

2127

—

1

×

B

APP SEN 2/CIRC

P2128

2128

—

1

×

B

TP SENSOR-B1

P2135

2135

—

1

×

B

APP SENSOR

P2138

2138

—

1

×

B

A/F SENSOR1 (B1)

P2A00

2A00

—

2

×

A

A/F SENSOR1 (B2)

P2A03

2A03

—

2

×

A

Items

(CONSULT-III screen terms)

DTC*

1

SRT

code

Trip

MIL

Permanent

DTC group*

4

Reference

page

CONSULT-III

GST*

2

ECM*

3

2010 Pathfinder

ECM

EC-465

< ECU DIAGNOSIS >

[VQ40DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

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 saved in the ECM memory. The MIL will not

illuminate (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 saved in the ECM memory and the MIL illuminates. In other words,

the DTC is saved in the ECM memory and the MIL illuminates when the same malfunction occurs in two con-

secutive trips. If a 1st trip DTC is saved and a non-diagnostic operation is performed between the 1st and 2nd

trips, only the 1st trip DTC will continue to be saved. For malfunctions that blink or illuminate the MIL during

the 1st trip, the DTC and 1st trip DTC are saved 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/ISO 15031-5. 1st trip DTC detection occurs without illu-

minating 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/ISO 15031-6.

(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 and 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 saved 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 saved in the ECM memory, along with the 1st trip DTC, are called 1st trip freeze frame data.

The data, saved 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-79, "CONSULT-III Function (ENGINE)"

.

Only one set of freeze frame data (either 1st trip freeze frame data or freeze frame data) can be saved in the

ECM. 1st trip freeze frame data is saved 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 saved in the ECM memory, 1st trip freeze frame data is no

longer saved. Remember, only one set of freeze frame data can be saved in the ECM. The ECM has the fol-

lowing priorities to update the data.

2010 Pathfinder

EC-466

< ECU DIAGNOSIS >

[VQ40DE]

ECM

For example, the EGR malfunction (Priority: 2) was detected and the freeze frame data was saved 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

saved in the ECM memory, 1st trip freeze data is no longer saved (because only one freeze frame data or 1st

trip freeze frame data can be saved in the ECM). If freeze frame data is saved 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/ISO 15031-5.

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 permanent DTC is stored or MIL illuminates 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”), DTC (No DTCs) and permanent DTC (No permanent DTCs) before the

inspection.

SRT Item

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

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

EGR/VVT SYSTEM

3

Intake value timing control function

P0011, P0021

2010 Pathfinder

ECM

EC-467

< ECU DIAGNOSIS >

[VQ40DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

*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.

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 show OK results in a single cycle (Ignition OFF-ON-OFF), the SRT will

indicate “CMPLT”.

→

Case 1 above

When all SRT related self-diagnoses show 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 show NG results in 2 consecutive cycles, the SRT will also indicate

“CMPLT”.

→

Case 3 above

The table above shows that the minimum number of cycles for setting SRT as “INCMP” is one the number (1)

for each self-diagnosis (Case 1 & 2) or the number 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.

• During SRT driving pattern, the 1st trip DTC (NG) is detected prior to “CMPLT” of SRT and the self-diagnosis

memory must be erased from the 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”

2010 Pathfinder

Content .. 294 295 296 297 ..