Nissan Murano Z50 (2006 year). Manual

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-59

Revision: 2006 August

2006 Murano

Perform

CVT-31, "HOW TO ERASE DTC (WITH GST)"

. (The DTC in TCM will be erased)

Select Service $04 with GST (Generic Scan Tool).

No Tools

NOTE:
If the DTC is not for CVT related items (see

EC-8, "INDEX FOR DTC"

), skip step 2.

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.

Perform

CVT-30, "HOW TO ERASE DTC"

. (The DTC in the TCM will be erased.)

Change the diagnostic test mode from Mode II to Mode I by depressing the accelerator pedal. Refer to

EC-60, "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)

NBS002Z4

DESCRIPTION

The MIL is located on the instrument panel.

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-38, "WARNING LAMPS"

or see

EC-667

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-60

ON BOARD DIAGNOSTIC (OBD) SYSTEM

Revision: 2006 August

2006 Murano

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-54, "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)

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

Repeat the following procedure quickly 5 times within 5 seconds.

Fully depress the accelerator pedal.

Fully release the accelerator pedal.

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.
Status

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-61

Revision: 2006 August

2006 Murano

NOTE:
Do not release the accelerator pedal for 10 seconds if MIL may start blinking on the halfway of this
10 seconds. This blinking is displaying SRT status and is continued for another 10 seconds. For
the details, refer to

EC-54, "How to Display SRT Status"

Fully release the accelerator pedal.
ECM has entered to Diagnostic Test Mode II (Self-diagnostic results).

NOTE:
Wait until the same DTC (or 1st trip DTC) appears to confirm all DTCs certainly.

How to Erase Diagnostic Test Mode II (Self-diagnostic Results)

Set ECM in Diagnostic Test Mode II (Self-diagnostic results). Refer to

EC-60, "How to Set Diagnostic Test

Mode II (Self-diagnostic Results)"

Fully depress the accelerator pedal and keep it for more than 10 seconds.
The emission-related diagnostic information has been erased from the backup memory in the ECM.

Fully release the accelerator pedal, and confirm the DTC 0000 is displayed.

DIAGNOSTIC TEST MODE I — BULB CHECK

In this mode, the MIL on the instrument panel should stay ON. If it remains OFF, check the bulb. Refer to

DI-

38, "WARNING LAMPS"

or see

EC-667

DIAGNOSTIC TEST MODE I — MALFUNCTION WARNING

This DTC number is clarified in Diagnostic Test Mode II (SELF-DIAGNOSTIC RESULTS)

PBIB0092E

MIL

Condition

When the malfunction is detected.

OFF

No malfunction.

EC-62

ON BOARD DIAGNOSTIC (OBD) SYSTEM

Revision: 2006 August

2006 Murano

DIAGNOSTIC TEST MODE II — SELF-DIAGNOSTIC RESULTS

In this mode, the DTC and 1st trip DTC are indicated by the number of blinks of the MIL as shown below.
The DTC and 1st trip DTC are displayed at the same time. If the MIL does not illuminate in diagnostic test
mode I (Malfunction warning), all displayed items are 1st trip DTCs. If only one code is displayed when the MIL
illuminates in diagnostic test mode II (SELF-DIAGNOSTIC RESULTS), it is a DTC; if two or more codes are
displayed, they may be either DTCs or 1st trip DTCs. DTC No. is same as that of 1st trip DTC. These uniden-
tified codes can be identified by using the CONSULT-II or GST. A DTC will be used as an example for how to
read a code.

A particular trouble code can be identified by the number of four-digit numeral flashes. The “zero” is indicated
by the number of ten flashes. The “A” is indicated by the number of eleven flash. The length of time the
1,000th-digit numeral flashes on and off is 1.2 seconds consisting of an ON (0.6-second) - OFF (0.6-second)
cycle.
The 100th-digit numeral and lower digit numerals consist of a 0.3-second ON and 0.3-second OFF cycle.
A change from one digit numeral to another occurs at an interval of 1.0-second OFF. In other words, the later
numeral appears on the display 1.3 seconds after the former numeral has disappeared.
A change from one trouble code to another occurs at an interval of 1.8-second OFF.
In this way, all the detected malfunctions are classified by their DTC numbers. The DTC 0000 refers to no mal-
function. (See

EC-8, "INDEX FOR DTC"

)

How to Erase Diagnostic Test Mode II (Self-diagnostic Results)

The DTC can be erased from the back up memory in the ECM by depressing accelerator pedal. Refer to

EC-

61, "How to Erase Diagnostic Test Mode II (Self-diagnostic Results)"

●

If the battery is disconnected, the DTC will be lost from the backup memory within 24 hours.

●

Be careful not to erase the stored memory before starting trouble diagnoses.

PBIB3005E

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-63

Revision: 2006 August

2006 Murano

OBD System Operation Chart

NBS002Z5

RELATIONSHIP BETWEEN MIL, 1ST TRIP DTC, DTC, AND DETECTABLE ITEMS

●

When a malfunction is detected for the first time, the 1st trip DTC and the 1st trip freeze frame data are
stored in the ECM memory.

●

When the same malfunction is detected in two consecutive trips, the DTC and the freeze frame data are
stored in the ECM memory, and the MIL will come on. For details, refer to

EC-45, "Two Trip Detection

Logic"

●

The MIL will go off after the vehicle is driven 3 times (driving pattern B) with no malfunction. The drive is
counted only when the recorded driving pattern is met (as stored in the ECM). If another malfunction
occurs while counting, the counter will reset.

●

The DTC and the freeze frame data will be stored until the vehicle is driven 40 times (driving pattern A)
without the same malfunction recurring (except for Misfire and Fuel Injection System). For Misfire and
Fuel Injection System, the DTC and freeze frame data will be stored until the vehicle is driven 80 times
(driving pattern C) without the same malfunction recurring. The “TIME” in “SELF-DIAGNOSTIC
RESULTS” mode of CONSULT-II will count the number of times the vehicle is driven.

●

The 1st trip DTC is not displayed when the self-diagnosis results in OK for the 2nd trip.

SUMMARY CHART

For details about patterns B and C under “Fuel Injection System” and “Misfire”, see

EC-65

For details about patterns A and B under Other, see

EC-67

*1: Clear timing is at the moment OK is detected.
*2: Clear timing is when the same malfunction is detected in the 2nd trip.

Items

Fuel Injection System

Misfire

Other

MIL (goes off)

3 (pattern B)

DTC, Freeze Frame Data (no
display)

80 (pattern C)

40 (pattern A)

1st Trip DTC (clear)

1 (pattern C), *

1 (pattern B)

1st Trip Freeze Frame Data
(clear)

, *

1 (pattern B)

EC-64

ON BOARD DIAGNOSTIC (OBD) SYSTEM

Revision: 2006 August

2006 Murano

RELATIONSHIP BETWEEN MIL, DTC, 1ST TRIP DTC AND DRIVING PATTERNS FOR “MISFIRE
” <EXHAUST QUALITY DETERIORATION>, “FUEL INJECTION SYSTEM”

*1: When the same malfunction is

detected in two consecutive trips,
MIL will light up.

*2: MIL will go off after vehicle is driven

3 times (pattern B) without any mal-
functions.

*3: When the same malfunction is

detected in two consecutive trips, the
DTC and the freeze frame data will
be stored in ECM.

*4: The DTC and the freeze frame data

will not be displayed any longer after
vehicle is driven 80 times (pattern C)
without the same malfunction. (The
DTC and the freeze frame data still
remain in ECM.)

*5: When a malfunction is detected for

the first time, the 1st trip DTC and
the 1st trip freeze frame data will be
stored in ECM.

*6: The 1st trip DTC and the 1st trip

freeze frame data will be cleared at
the moment OK is detected.

*7: When the same malfunction is

detected in the 2nd trip, the 1st trip
freeze frame data will be cleared.

*8: 1st trip DTC will be cleared when

vehicle is driven once (pattern C)
without the same malfunction after
DTC is stored in ECM.

SEF392S

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-65

Revision: 2006 August

2006 Murano

EXPLANATION FOR DRIVING PATTERNS FOR “MISFIRE <EXHAUST QUALITY DETERIORA-
TION>”, “FUEL INJECTION SYSTEM”
<Driving Pattern B>

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>

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

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

(158

●

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 (*2 in OBD SYSTEM OPERATION CHART).

●

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

EC-66

ON BOARD DIAGNOSTIC (OBD) SYSTEM

Revision: 2006 August

2006 Murano

RELATIONSHIP BETWEEN MIL, DTC, 1ST TRIP DTC AND DRIVING PATTERNS EXCEPT FOR
“MISFIRE <EXHAUST QUALITY DETERIORATION>”, “FUEL INJECTION SYSTEM”

*1: When the same malfunction is

detected in two consecutive trips,
MIL will light up.

*2: MIL will go off after vehicle is driven

3 times (pattern B) without any mal-
functions.

*3: When the same malfunction is

detected in two consecutive trips, the
DTC and the freeze frame data will
be stored in ECM.

*4: The DTC and the freeze frame data

will not be displayed any longer after
vehicle is driven 40 times (pattern A)
without the same malfunction.
(The DTC and the freeze frame data
still remain in ECM.)

*5: When a malfunction is detected for

the first time, the 1st trip DTC and
the 1st trip freeze frame data will be
stored in ECM.

*6: 1st trip DTC will be cleared after

vehicle is driven once (pattern B)
without the same malfunction.

*7: When the same malfunction is

detected in the 2nd trip, the 1st trip
freeze frame data will be cleared.

SEF393SD

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-67

Revision: 2006 August

2006 Murano

EXPLANATION FOR DRIVING PATTERNS EXCEPT FOR “MISFIRE <EXHAUST QUALITY
DETERIORATION>”, “FUEL INJECTION SYSTEM”
<Driving Pattern A>

●

The A counter will be cleared when the malfunction is detected regardless of (1) - (4).

●

The A counter will be counted up when (1) - (4) are satisfied without the same malfunction.

●

The DTC will not be displayed after the A counter reaches 40 (*2 in OBD SYSTEM OPERATION CHART).

<Driving Pattern B>

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 malfunctions.

●

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

AEC574

EC-68

BASIC SERVICE PROCEDURE

Revision: 2006 August

2006 Murano

BASIC SERVICE PROCEDURE

PFP:00018

Basic Inspection

NBS002Z6

INSPECTION START

Check service records for any recent repairs that may indicate a related malfunction, or a current need for
scheduled maintenance.

Open engine hood and check the following:

–

Harness connectors for improper connections

–

Wiring harness for improper connections, pinches and cut

–

Vacuum hoses for splits, kinks and improper connections

–

Hoses and ducts for leaks

–

Air cleaner clogging

–

Gasket

Confirm that electrical or mechanical loads are not applied.

–

Headlamp switch is OFF.

–

Air conditioner switch is OFF.

–

Rear window defogger switch is OFF.

–

Steering wheel is in the straight-ahead position, etc.

Start engine and warm it up until engine coolant temperature
indicator points the middle of gauge.
Ensure engine stays below 1,000 rpm.

Run engine at about 2,000 rpm for about 2 minutes under no-
load.

Make sure that no DTC is displayed with CONSULT-II or GST.

OK or NG

>> GO TO 3.

>> GO TO 2.

REPAIR OR REPLACE

Repair or replace components as necessary according to corresponding Diagnostic Procedure.

>> GO TO 3.

SEF983U

SEF976U

SEF977U

BASIC SERVICE PROCEDURE

EC-69

Revision: 2006 August

2006 Murano

CHECK TARGET IDLE SPEED

With CONSULT-II

Run engine at about 2,000 rpm for about 2 minutes under no load.

Rev engine (2,000 to 3,000 rpm) two or three times under no
load, then run engine at idle speed for about 1 minute.

Read idle speed in “DATA MONITOR” mode with CONSULT-II.
Refer to

EC-73, "IDLE SPEED"

Without CONSULT-II

Run engine at about 2,000 rpm for about 2 minutes under no load.

Rev engine (2,000 to 3,000 rpm) two or three times under no load, then run engine at idle speed for about
1 minute.

Check idle speed. Refer to

EC-73, "IDLE SPEED"

OK or NG

>> GO TO 10.

>> GO TO 4.

PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

Stop engine.

Perform

EC-75, "Accelerator Pedal Released Position Learning"

>> GO TO 5.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform

EC-76, "Throttle Valve Closed Position Learning"

>> GO TO 6.

PBIA8513J

650

50 rpm (in P or N position)

SEF058Y

650

50 rpm (in P or N position)

EC-70

BASIC SERVICE PROCEDURE

Revision: 2006 August

2006 Murano

PERFORM IDLE AIR VOLUME LEARNING

Refer to

EC-76, "Idle Air Volume Learning"

Is Idle Air Volume Learning carried out successfully?

Yes or No

Yes

>> GO TO 7.

>> 1. Follow the instruction of Idle Air Volume Learning.

2. GO TO 4.

CHECK TARGET IDLE SPEED AGAIN

With CONSULT-II

Start engine and warm it up to normal operating temperature.

Read idle speed in “DATA MONITOR” mode with CONSULT-II.
Refer to

EC-73, "IDLE SPEED"

Without CONSULT-II

Start engine and warm it up to normal operating temperature.

Check idle speed. Refer to

EC-73, "IDLE SPEED"

OK or NG

>> GO TO 10.

>> GO TO 8.

DETECT MALFUNCTIONING PART

Check the following.

●

Check camshaft position sensor (PHASE) and circuit. Refer to

EC-371

●

Check crankshaft position sensor (POS) and circuit. Refer to

EC-364

OK or NG

>> GO TO 9.

>> 1. Repair or replace.

2. GO TO 4.

CHECK ECM FUNCTION

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

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

BL-236, "NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)"

>> GO TO 4.

650

50 rpm (in P or N position)

650

50 rpm (in P or N position)

SEF174Y

BASIC SERVICE PROCEDURE

EC-71

Revision: 2006 August

2006 Murano

10.

CHECK IGNITION TIMING

Run engine at idle.

Check ignition timing with a timing light. Refer to

EC-73, "IGNITION TIMING"

OK or NG

>> GO TO 19.

>> GO TO 11.

11.

PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

Stop engine.

Perform

EC-75, "Accelerator Pedal Released Position Learning"

>> GO TO 12.

12.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform

EC-76, "Throttle Valve Closed Position Learning"

>> GO TO 13.

13.

PERFORM IDLE AIR VOLUME LEARNING

Refer to

EC-76, "Idle Air Volume Learning"

Is Idle Air Volume Learning carried out successfully?
Yes or No

Yes

>> GO TO 14.

>> 1. Follow the instruction of Idle Air Volume Learning.

2. GO TO 4.

BTDC (in P or N position)

PBIB1382E

EC-72

BASIC SERVICE PROCEDURE

Revision: 2006 August

2006 Murano

14.

CHECK TARGET IDLE SPEED AGAIN

With CONSULT-II

Start engine and warm it up to normal operating temperature.

Read idle speed in “DATA MONITOR” mode with CONSULT-II.
Refer to

EC-73, "IDLE SPEED"

Without CONSULT-II

Start engine and warm it up to normal operating temperature.

Check idle speed. Refer to

EC-73, "IDLE SPEED"

OK or NG

>> GO TO 15.

>> GO TO 17.

15.

CHECK IGNITION TIMING AGAIN

Run engine at idle.

Check ignition timing with a timing light. Refer to

EC-73, "IGNITION TIMING"

OK or NG

>> GO TO 19.

>> GO TO 16.

16.

CHECK TIMING CHAIN INSTALLATION

Check timing chain installation. Refer to

EM-60, "TIMING CHAIN"

OK or NG

>> GO TO 17.

>> 1. Repair the timing chain installation.

2. GO TO 4.

17.

DETECT MALFUNCTIONING PART

Check the following.

●

Check camshaft position sensor (PHASE) and circuit. Refer to

EC-371

●

Check crankshaft position sensor (POS) and circuit. Refer to

EC-364

OK or NG

>> GO TO 18.

>> 1. Repair or replace.

2. GO TO 4.

650

50 rpm (in P or N position)

650

50 rpm (in P or N position)

SEF174Y

BTDC (in P or N position)

PBIB1382E

BASIC SERVICE PROCEDURE

EC-73

Revision: 2006 August

2006 Murano

18.

CHECK ECM FUNCTION

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

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

BL-236, "NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)"

>> GO TO 4.

19.

INSPECTION END

Did you replace the ECM, referring this Basic Inspection procedure?

Yes or No

Yes

>> 1. Perform

EC-75, "VIN Registration"

2. INSPECTION END

>> INSPECTION END

Idle Speed and Ignition Timing Check

NBS002Z7

IDLE SPEED

With CONSULT-II

Check idle speed in “DATA MONITOR” mode with CONSULT-II.

With GST

Check idle speed with GST.

IGNITION TIMING
Method A

Attach timing light to loop wire as shown.

SEF058Y

PBIB1374E

Nissan Murano Z50 (2006 year). Manual - part 80