Index Manuals Nissan Murano Z50 (2003 year) - Service and Repair Manual

Search copyright infringement

Content .. 82 83 84 85 ..

Nissan Murano Z50 (2003 year). Manual - part 84

BASIC SERVICE PROCEDURE

EC-63

C

D

E

F

G

H

I

J

K

L

M

A

EC

Revision; 2004 April

2003 Murano

33.

CHECK HEATED OXYGEN SENSOR 1 (BANK 1)/(BANK 2) SIGNAL

Without CONSULT-II

1.

Set ECM to Self-diagnostic mode II (Heated oxygen sensor 1 monitor). Refer to

SWITCH DIAGNOSTIC TEST MODE"

2.

Switch the monitored sensor to the malfunctioning bank. Refer to

EC-85, "How to Switch Monitored Sen-

sor From Bank 1 to Bank 2 or Vice Versa"

.

3.

Running engine at 2,000 rpm under no-load (The engine is warmed up to normal operating temperature.),
check that the MIL comes on more than 5 times during 10 seconds.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 34.

34.

DETECT MALFUNCTIONING PART

Check the following.

●

Check fuel pressure regulator and repair or replace if necessary. Refer to

EC-66, "Fuel Pressure Check"

●

Check mass air flow sensor and its circuit, and repair or replace if necessary. Refer to

.

●

Check injector and its circuit, and repair or replace if necessary. Refer to

●

Check engine coolant temperature sensor and its circuit, and repair or replace if necessary. Refer to

and

OK or NG

OK

>> GO TO 36.

NG

>> 1. Repair or replace.

2. GO TO 35.

35.

ERASE UNNECESSARY DTC

After this inspection, unnecessary DTC might be displayed.
Erase the stored memory in ECM and TCM. Refer to

EC-81, "HOW TO ERASE EMISSION-RELATED DIAG-

NOSTIC INFORMATION"

and

CVT-46, "HOW TO ERASE DTC"

.

>> GO TO 4.

36.

CHECK ECM FUNCTION

1.

Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but
this is the rarely the case.)

2.

Perform initialization of NVIS (NATS) system and registration of NVIS (NATS) ignition key IDs. Refer to

BL-189, "ECM Re-communicating Function"

.

>> GO TO 4.

Accelerator Pedal Released Position Learning

ABS004AI

DESCRIPTION

“Accelerator Pedal Released Position Learning” is an operation to learn the fully released position of the accel-
erator pedal by monitoring the accelerator pedal position sensor output signal. It must be performed each time
harness connector of accelerator pedal position sensor or ECM is disconnected.

OPERATION PROCEDURE

1.

Make sure that accelerator pedal is fully released.

2.

Turn ignition switch “ON” and wait at least 2 seconds.

3.

Turn ignition switch “OFF” wait at least 10 seconds.

4.

Turn ignition switch “ON” and wait at least 2 seconds.

5.

Turn ignition switch “OFF” wait at least 10 seconds.

EC-64

BASIC SERVICE PROCEDURE

Revision; 2004 April

2003 Murano

Throttle Valve Closed Position Learning

ABS004AJ

DESCRIPTION

“Throttle Valve Closed Position Learning” is an operation to learn the fully closed position of the throttle valve
by monitoring the throttle position sensor output signal. It must be performed each time harness connector of
electric throttle control actuator or ECM is disconnected.

OPERATION PROCEDURE

1.

Make sure that accelerator pedal is fully released.

2.

Turn ignition switch “ON”.

3.

Turn ignition switch “OFF” wait at least 10 seconds.
Make sure that throttle valve moves during above 10 seconds by confirming the operating sound.

Idle Air Volume Learning

ABS004AK

DESCRIPTION

“Idle Air Volume Learning” is an operation to learn the idle air volume that keeps each engine within the spe-
cific range. It must be performed under any of the following conditions:

●

Each time electric throttle control actuator or ECM is replaced.

●

Idle speed or ignition timing is out of specification.

PREPARATION

Before performing “Idle Air Volume Learning”, make sure that all of the following conditions are satisfied.
Learning will be cancelled if any of the following conditions are missed for even a moment.

●

Battery voltage: More than 12.9V (At idle)

●

Engine coolant temperature: 70 - 100

°

C (158 - 212

°

F)

●

PNP switch: ON

●

Electric load switch: OFF
(Air conditioner, headlamp, rear window defogger)
On vehicles equipped with daytime light systems, set lighting switch to the 1st position to light
only small lamps.

●

Steering wheel: Neutral (Straight-ahead position)

●

Vehicle speed: Stopped

●

Transmission: Warmed-up
For models with CONSULT-II, drive vehicle until “FLUID TEMP SE” in “DATA MONITOR” mode of “CVT”
system indicates less than 0.9V.
For models without CONSULT-II, drive vehicle for 10 minutes.

OPERATION PROCEDURE

With CONSULT-II

1.

Perform

EC-63, "Accelerator Pedal Released Position Learning"

.

2.

Perform

EC-64, "Throttle Valve Closed Position Learning"

3.

Start engine and warm it up to normal operating temperature.

4.

Check that all items listed under the topic “PREPARATION” (previously mentioned) are in good order.

5.

Select “IDLE AIR VOL LEARN” in “WORK SUPPORT” mode.

SEF217Z

BASIC SERVICE PROCEDURE

EC-65

C

D

E

F

G

H

I

J

K

L

M

A

EC

Revision; 2004 April

2003 Murano

6.

Touch “START” and wait 20 seconds.

7.

Make sure that “CMPLT” is displayed on CONSULT-II screen. If
“CMPLT” is not displayed, “Idle Air Volume Learning” will not be
carried out successfully. In this case, find the cause of the inci-
dent by referring to the “Diagnostic Procedure” below.

8.

Rev up the engine two or three times and make sure that idle
speed and ignition timing are within the specifications.

Without CONSULT-II

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.

1.

Perform

EC-63, "Accelerator Pedal Released Position Learning"

2.

Perform

EC-64, "Throttle Valve Closed Position Learning"

3.

Start engine and warm it up to normal operating temperature.

4.

Check that all items listed under the topic “PREPARATION” (previously mentioned) are in good order.

5.

Turn ignition switch “OFF” and wait at least 10 seconds.

6.

Confirm that accelerator pedal is fully released, turn ignition switch “ON” and wait 3 seconds.

7.

Repeat the following procedure quickly five times within 5 seconds.

a.

Fully depress the accelerator pedal.

b.

Fully release the accelerator pedal.

8.

Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 20 seconds until the MIL stops
blinking and turned ON.

9.

Fully release the accelerator pedal within 3 seconds after the MIL turned ON.

10. Start engine and let it idle.

11. Wait 20 seconds.

12. Rev up the engine two or three times and make sure that idle speed and ignition timing are within the

specifications.

SEF454Y

ITEM

SPECIFICATION

Idle speed

CVT: 650

±

50 rpm (in “P” or “N” position)

Ignition timing

CVT: 15

±

5

°

BTDC (in “P” or “N” position)

MBIB0238E

SEC897C

EC-66

BASIC SERVICE PROCEDURE

Revision; 2004 April

2003 Murano

13. If idle speed and ignition timing are not within the specification, “Idle Air Volume Learning” will not be car-

ried out successfully. In this case, find the cause of the incident by referring to the “DIAGNOSTIC PROCE-
DURE” below.

DIAGNOSTIC PROCEDURE

If idle air volume learning cannot be performed successfully, proceed as follows:
1.

Check that throttle valve is fully closed.

2.

Check PCV valve operation.

3.

Check that downstream of throttle valve is free from air leakage.

4.

When the above three items check out OK, engine component parts and their installation condi-
tion are questionable. Check and eliminate the cause of the incident.
It is useful to perform

EC-147, "TROUBLE DIAGNOSIS - SPECIFICATION VALUE"

5.

If any of the following conditions occur after the engine has started, eliminate the cause of the
incident and perform “Idle air volume learning” all over again:

●

Engine stalls.

●

Erroneous idle.

Fuel Pressure Check

ABS004AL

FUEL PRESSURE RELEASE

Before disconnecting fuel line, release fuel pressure from fuel line to eliminate danger.

NOTE:
Prepare pans or saucers under the disconnected fuel line because the fuel may spill out. The fuel pres-
sure cannot be completely released because Z50 models do not have fuel return system.

With CONSULT-II

1.

Turn ignition switch “ON”.

2.

Perform “FUEL PRESSURE RELEASE” in “WORK SUPPORT”
mode with CONSULT-II.

3.

Start engine.

4.

After engine stalls, crank it two or three times to release all fuel
pressure.

5.

Turn ignition switch “OFF”.

Without CONSULT-II

1.

Remove fuel pump fuse located in IPDM E/R.

2.

Start engine.

3.

After engine stalls, crank it two or three times to release all fuel
pressure.

4.

Turn ignition switch “OFF”.

5.

Reinstall fuel pump fuse after servicing fuel system.

ITEM

SPECIFICATION

Idle speed

CVT: 650

±

50 rpm (in “P” or “N” position)

Ignition timing

CVT: 15

±

5

°

BTDC (in “P” or “N” position)

SEF214Y

PBIB1375E

BASIC SERVICE PROCEDURE

EC-67

C

D

E

F

G

H

I

J

K

L

M

A

EC

Revision; 2004 April

2003 Murano

FUEL PRESSURE CHECK

NOTE:
Use Fuel Pressure Gauge Kit (J-44321) to check fuel pressure.
1.

Release fuel pressure to zero. Refer to

EC-66, "FUEL PRESSURE RELEASE"

2.

Install the inline fuel quick disconnected fitting between fuel
damper and injector tube.

3.

Connect the fuel pressure test gauge (quick connector adapter
hose) to the inline fuel quick disconnected fitting.

4.

Turn ignition switch ON and check for fuel leakage.

5.

Start engine and check for fuel leakage.

6.

Read the indication of fuel pressure gauge.

7.

If result is unsatisfactory, go to next step.

8.

Check the following.

●

Fuel hoses and fuel tubes for clogging

●

Fuel filter for clogging

●

Fuel pump

●

Fuel pressure regulator for clogging

If OK, replace fuel pressure regulator.
If NG, repair or replace.

At idling:

Approximately 350 kPa (3.57 kg/cm

2

, 51 psi)

PBIB1376E

EC-68

ON BOARD DIAGNOSTIC (OBD) SYSTEM

Revision; 2004 April

2003 Murano

ON BOARD DIAGNOSTIC (OBD) SYSTEM

PFP:00028

Introduction

ABS004AM

The ECM has an on board diagnostic system, which detects malfunctions related to engine sensors or actua-
tors. The ECM also records various emission-related diagnostic information including:

The above information can be checked using procedures listed in the table below.

×

: Applicable

—: Not applicable

*1: 1st trip DTCs for self-diagnoses concerning SRT items cannot be shown on the GST display.
*2: When DTC and 1st trip DTC simultaneously appear on the display, they cannot be clearly distinguished from each other.

The malfunction indicator lamp (MIL) on the instrument panel lights up when the same malfunction is detected
in two consecutive trips (Two trip detection logic), or when the ECM enters fail-safe mode. (Refer to

.)

Two Trip Detection Logic

ABS004AN

When a malfunction is detected for the first time, 1st trip DTC and 1st trip Freeze Frame data are stored in the
ECM memory. The MIL will not light up at this stage. <1st trip>
If the same malfunction is detected again during the next drive, the DTC and Freeze Frame data are stored in
the ECM memory, and the MIL lights up. The MIL lights up at the same time when the DTC is stored. <2nd
trip> The “trip” in the “Two Trip Detection Logic” means a driving mode in which self-diagnosis is performed
during vehicle operation. Specific on board diagnostic items will cause the ECM to light up or blink the MIL,
and store DTC and Freeze Frame data, even in the 1st trip, as shown below.

×

: Applicable

—: Not applicable

When there is an open circuit on MIL circuit, the ECM cannot warn the driver by lighting MIL up 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.

Emission-related diagnostic information

SAE Mode

Diagnostic Trouble Code (DTC)

Mode 3 of SAE J1979

Freeze Frame data

Mode 2 of SAE J1979

System Readiness Test (SRT) code

Mode 1 of SAE J1979

1st Trip Diagnostic Trouble Code (1st Trip DTC)

Mode 7 of SAE J1979

1st Trip Freeze Frame data

Test values and Test limits

Mode 6 of SAE J1979

Calibration ID

Mode 9 of SAE J1979

DTC

1st trip DTC

Freeze Frame

data

1st trip Freeze

Frame data

SRT code

Test value

CONSULT-II

×

×

×

×

×

—

GST

×

×

*1

×

—

×

×

ECM

×

×

*2

—

—

—

—

Items

MIL

DTC

1st trip DTC

1st trip

2nd trip

1st trip

displaying

2nd trip

displaying

1st trip

displaying

2nd trip

display-

ing

Blinking

Lighting

up

Blinking

Lighting

up

Misfire (Possible three way cata-
lyst damage) — DTC: P0300 -
P0306 is being detected

×

—

—

—

—

—

×

—

Misfire (Possible three way cata-
lyst damage) — DTC: P0300 -
P0306 is being detected

—

—

×

—

—

×

—

—

One trip detection diagnoses
(Refer to

—

×

—

—

×

—

—

—

Except above

—

—

—

×

—

×

×

—

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-69

C

D

E

F

G

H

I

J

K

L

M

A

EC

Revision; 2004 April

2003 Murano

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 Information

ABS004AO

EMISSION-RELATED DIAGNOSTIC INFORMATION ITEMS

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)

1st trip DTC

Reference

page

CONSULT-II

GST*

2

ECM*

3

CAN COMM CIRCUIT

U1000

1000*

6

—

—

—

CAN COMM CIRCUIT

U1001

1001*

6

—

—

×

NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.

P0000

0000

—

—

—

—

INT/V TIM CONT-B1

P0011

0011

—

—

×

INT/V TIM CONT-B2

P0021

0021

—

—

×

HO2S1 HTR (B1)

P0031

0031

×

×

×

*

5

HO2S1 HTR (B1)

P0032

0032

×

×

×

*

5

HO2S2 HTR (B1)

P0037

0037

×

×

×

*

5

HO2S2 HTR (B1)

P0038

0038

×

×

×

*

5

HO2S1 HTR (B2)

P0051

0051

×

×

×

*

5

HO2S1 HTR (B2)

P0052

0052

×

×

×

*

5

HO2S2 HTR (B2)

P0057

0057

×

×

×

*

5

HO2S2 HTR (B2)

P0058

0058

×

×

×

*

5

MAF SEN/CIRCUIT

P0101

0101

—

—

—

MAF SEN/CIRCUIT

P0102

0102

—

—

—

MAF SEN/CIRCUIT

P0103

0103

—

—

—

IAT SEN/CIRCUIT

P0112

0112

—

—

×

IAT SEN/CIRCUIT

P0113

0113

—

—

×

ECT SEN/CIRCUIT

P0117

0117

—

—

—

ECT SEN/CIRCUIT

P0118

0118

—

—

—

TP SEN 2/CIRC

P0122

0122

—

—

—

TP SEN 2/CIRC

P0123

0123

—

—

—

ECT SENSOR

P0125

0125

—

—

—

IAT SENSOR

P0127

0127

—

—

×

THERMSTAT FNCTN

P0128

0128

—

—

×

HO2S1 (B1)

P0132

0132

×

×

×

*

5

HO2S1 (B1)

P0133

0133

×

×

×

*

5

HO2S1 (B1)

P0134

0134

×

×

×

*

5

HO2S2 (B1)

P0138

0138

×

×

×

*

5

HO2S2 (B1)

P0139

0139

×

×

×

*

5

HO2S1 (B2)

P0152

0152

×

×

×

*

5

HO2S1 (B2)

P0153

0153

×

×

×

*

5

HO2S1 (B2)

P0154

0154

×

×

×

*

5

EC-70

ON BOARD DIAGNOSTIC (OBD) SYSTEM

Revision; 2004 April

2003 Murano

HO2S2 (B2)

P0158

0158

×

×

×

*

5

HO2S2 (B2)

P0159

0159

×

×

×

*

5

FUEL SYS-LEAN-B1

P0171

0171

—

—

×

FUEL SYS-RICH-B1

P0172

0172

—

—

×

FUEL SYS-LEAN-B2

P0174

0174

—

—

×

FUEL SYS-RICH-B2

P0175

0175

—

—

×

FTT SENSOR

P0181

0181

—

—

×

FTT SEN/CIRCUIT

P0182

0182

—

—

×

FTT SEN/CIRCUIT

P0183

0183

—

—

×

TP SEN 1/CIRC

P0222

0222

—

—

—

TP SEN 1/CIRC

P0223

0223

—

—

—

MULTI CYL MISFIRE

P0300

0300

—

—

×

CYL 1 MISFIRE

P0301

0301

—

—

×

CYL 2 MISFIRE

P0302

0302

—

—

×

CYL 3 MISFIRE

P0303

0303

—

—

×

CYL 4 MISFIRE

P0304

0304

—

—

×

CYL 5 MISFIRE

P0305

0305

—

—

×

CYL 6 MISFIRE

P0306

0306

—

—

×

KNOCK SEN/CIRC-B1

P0327

0327

—

—

×

KNOCK SEN/CIRC-B1

P0328

0328

—

—

×

CKP SEN/CIRCUIT

P0335

0335

—

—

×

CMP SEN/CIRC-B1

P0340

0340

—

—

×

CMP SEN/CIRC-B2

P0345

0345

—

—

×

TW CATALYST SYS-B1

P0420

0420

×

×

×

*

5

TW CATALYST SYS-B2

P0430

0430

×

×

×

*

5

EVAP PURG FLOW/MON

P0441

0441

×

×

×

*

5

EVAP SMALL LEAK

P0442

0442

×

×

×

*

5

PURG VOLUME CONT/V

P0444

0444

—

—

×

PURG VOLUME CONT/V

P0445

0445

—

—

×

VENT CONTROL VALVE

P0447

0447

—

—

×

EVAP SYS PRES SEN

P0451

0451

—

—

×

EVAP SYS PRES SEN

P0452

0452

—

—

×

EVAP SYS PRES SEN

P0453

0453

—

—

×

EVAP GROSS LEAK

P0455

0455

—

×

×

*

5

EVAP VERY SML LEAK

P0456

0456

×

*

4

×

×

*

5

FUEL LEV SEN SLOSH

P0460

0460

—

—

×

FUEL LEVEL SENSOR

P0461

0461

—

—

×

FUEL LEVL SEN/CIRC

P0462

0462

—

—

×

FUEL LEVL SEN/CIRC

P0463

0463

—

—

×

VEH SPEED SEN/CIRC*

7

P0500

0500

—

—

×

ISC SYSTEM

P0506

0506

—

—

×

Items

(CONSULT-II screen terms)

DTC*

1

SRT code

Test value/

Test limit

(GST only)

1st trip DTC

Reference

page

CONSULT-II

GST*

2

ECM*

3

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-71

C

D

E

F

G

H

I

J

K

L

M

A

EC

Revision; 2004 April

2003 Murano

ISC SYSTEM

P0507

0507

—

—

×

PW ST P SEN/CIRC

P0550

0550

—

—

×

ECM

P0605

0605

—

—

×

or —

PNP SW/CIRC

P0705

0705

—

—

×

ATF TEMP SEN/CIRC

P0710

0710

—

—

—

INPUT SPD SEN/CIRC

(IN PY SPD SEN/CIRC)*

8

P0715

0715

—

—

×

VEH SPD SEN/CIR AT*

7

P0720

0720

—

—

×

TCC SOLENOID/CIRC

P0740

0740

—

—

×

A/T TCC S/V FNCTN

P0744

0744

—

—

×

L/PRESS SOL/CIRC

P0745

0745

—

—

×

PRS CNT SOL/A FCTN

(—)*

8

P0746

0746

—

—

—

PRS CNT SOL/B FCTN

(—)*

8

P0776

0776

—

—

×

PRS CNT SOL/B CIRC

(—)*

8

P0778

0778

—

—

×

TR PRS SENS/A CIRC

(—)*

8

P0840

0840

—

—

×

TR PRS SENS/B CIRC

(—)*

8

P0845

0845

—

—

×

ECM BACK UP/CIRC

P1065

1065

—

—

×

INT/V TIM V/CIR-B1

P1111

1111

—

—

×

ETC ACTR

P1121

1121

—

—

—

ETC FUNCTION/CIRC

P1122

1122

—

—

—

ETC MOT PWR

P1124

1124

—

—

—

ETC MOT PWR

P1126

1126

—

—

—

ETC MOT

P1128

1128

—

—

—

INT/V TIM V/CIR-B2

P1136

1136

—

—

×

HO2S1 (B1)

P1143

1143

×

×

×

*

5

HO2S1 (B1)

P1144

1144

×

×

×

*

5

HO2S2 (B1)

P1146

1146

×

×

×

*

5

HO2S2 (B1)

P1147

1147

×

×

×

*

5

CLOSED LOOP-B1

P1148

1148

—

—

—

HO2S1 (B2)

P1163

1163

×

×

×

*

5

HO2S1 (B2)

P1164

1164

×

×

×

*

5

HO2S2 (B2)

P1166

1166

×

×

×

*

5

HO2S2 (B2)

P1167

1167

×

×

×

*

5

CLOSED LOOP-B2

P1168

1168

—

—

—

TCS C/U FUNCTN

P1211

1211

—

—

×

TCS/CIRC

P1212

1212

—

—

×

ENG OVER TEMP

P1217

1217

—

—

—

Items

(CONSULT-II screen terms)

DTC*

1

SRT code

Test value/

Test limit

(GST only)

1st trip DTC

Reference

page

CONSULT-II

GST*

2

ECM*

3

EC-72

ON BOARD DIAGNOSTIC (OBD) SYSTEM

Revision; 2004 April

2003 Murano

*1: 1st trip DTC No. is the same as DTC No.
*2: These numbers are prescribed by SAE J2012.
*3: In Diagnostic Test Mode II (Self-diagnostic results), these numbers are controlled by NISSAN.
*4: SRT code will not be set if the self-diagnostic result is NG.
*5: These are not displayed with GST.
*6: The troubleshooting for these DTCs need CONSULT-II.
*7: When the fail-safe operations for both self-diagnoses occur at the same time, the MIL illuminates.
*8: CONSULT-II screen terms are shown differently depending on the version of CONSULT-II card.

NOTE:
Regarding Z50 models, "B1" indicates bank 1, "B2" indicates bank 2.

CTP LEARNING

P1225

1225

—

—

×

CTP LEARNING

P1226

1226

—

—

×

SENSOR POWER/CIRC

P1229

1229

—

—

—

PURG VOLUME CONT/V

P1444

1444

—

—

×

VENT CONTROL VALVE

P1446

1446

—

—

×

ASCD SW

P1564

1564

—

—

—

ASCD BRAKE SW

P1572

1572

—

—

—

ASCD VHL SPD SEN

P1574

1574

—

—

—

NATS MALFUNCTION

P1610 -

P1615

1610 - 1615

—

—

×

CVT C/U FUNCT

P1700

1700

—

—

—

P-N POS SW/CIRCUIT

P1706

1706

—

—

×

IN PULY SPEED

P1715

1715

—

—

×

V/SP SEN (A/T OUT)

P1720

1720

—

—

×

LU-SLCT SOL/CIRC

(—)*

8

P1740

1740

—

—

×

STEP MOTR CIRC

P1777

1777

—

—

—

STEP MOTR FNC

P1778

1778

—

—

×

VIAS S/V CIRC

P1800

1800

—

—

×

BRAKE SW/CIRCUIT

P1805

1805

—

—

×

APP SEN 1/CIRC

P2122

2122

—

—

—

APP SEN 1/CIRC

P2123

2123

—

—

—

APP SEN 2/CIRC

P2127

2127

—

—

—

APP SEN 2/CIRC

P2128

2128

—

—

—

TP SENSOR

P2135

2135

—

—

—

APP SENSOR

P2138

2138

—

—

—

Items

(CONSULT-II screen terms)

DTC*

1

SRT code

Test value/

Test limit

(GST only)

1st trip DTC

Reference

page

CONSULT-II

GST*

2

ECM*

3

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-73

C

D

E

F

G

H

I

J

K

L

M

A

EC

Revision; 2004 April

2003 Murano

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

TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION"

For malfunctions in which 1st trip DTCs are displayed, refer to

EC-69, "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 Mode 7 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 vehi-
cle 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-93, "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]”.

PBIB0911E

EC-74

ON BOARD DIAGNOSTIC (OBD) SYSTEM

Revision; 2004 April

2003 Murano

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-129, "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.

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

EC-81, "HOW TO ERASE EMIS-

SION-RELATED DIAGNOSTIC INFORMATION"

.

SYSTEM READINESS TEST (SRT) CODE

System Readiness Test (SRT) code is specified in Mode 1 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.

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 CVT related items)

3

1st trip freeze frame data

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-75

C

D

E

F

G

H

I

J

K

L

M

A

EC

Revision; 2004 April

2003 Murano

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-II.

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.

SRT item

(CONSULT-II 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

1

EVAP control system

P0442

2

EVAP control system

P0456

2

EVAP control system purge flow monitoring

P0441

HO2S

2

Heated oxygen sensor 1

P0132, P0152

Heated oxygen sensor 1

P0133, P0153

Heated oxygen sensor 1

P0134, P0154

Heated oxygen sensor 1

P1143, P1163

Heated oxygen sensor 1

P1144, P1164

Heated oxygen sensor 2

P0138, P0158

Heated oxygen sensor 2

P0139, P0159

Heated oxygen sensor 2

P1146, P1166

Heated oxygen sensor 2

P1147, P1167

HO2S HTR

2

Heated oxygen sensor 1 heater

P0031, P0032, P0051,
P0052

Heated oxygen sensor 2 heater

P0037, P0038, P0057,
P0058

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-76

ON BOARD DIAGNOSTIC (OBD) SYSTEM

Revision; 2004 April

2003 Murano

—: 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-diagno-
sis 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.

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-77

C

D

E

F

G

H

I

J

K

L

M

A

EC

Revision; 2004 April

2003 Murano

How to Display SRT Code

WITH CONSULT-II

Selecting “SRT STATUS” in “DTC CONFIRMATION” mode with
CONSULT-II.
For items whose SRT codes are set, a “CMPLT” is displayed on the
CONSULT-II screen; for items whose SRT codes are not set,
“INCMP” is displayed.
A sample of CONSULT-II display for SRT code is shown at right.
“INCMP” means the self-diagnosis is incomplete and SRT is not set.
“CMPLT” means the self-diagnosis is complete and SRT is set.

WITH GST

Selecting Mode 1 with GST (Generic Scan Tool)

*1

*2

*3

SEF573XA

SEF935Z

EC-78

ON BOARD DIAGNOSTIC (OBD) SYSTEM

Revision; 2004 April

2003 Murano

How to Set SRT Code

To set all SRT codes, self-diagnosis for the items indicated above must be performed one or more times. Each
diagnosis may require a long period of actual driving under various conditions.

WITH CONSULT-II

Perform corresponding DTC Confirmation Procedure one by one based on “Performance Priority” in the table
on

EC-75, "SRT Item"

WITHOUT CONSULT-II

The most efficient driving pattern in which SRT codes can be properly set is explained on the next page. The
driving pattern should be performed one or more times to set all SRT codes.

Content .. 82 83 84 85 ..