Nissan Pathfinder (2005 year). Manual - part 152

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-67

2005 Pathfinder

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

EC-68

ON BOARD DIAGNOSTIC (OBD) SYSTEM

2005 Pathfinder

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.

●

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

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-69

2005 Pathfinder

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

EC-70

ON BOARD DIAGNOSTIC (OBD) SYSTEM

2005 Pathfinder

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.

<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

BASIC SERVICE PROCEDURE

EC-71

2005 Pathfinder

BASIC SERVICE PROCEDURE

PFP:00018

Basic Inspection

UBS00K3V

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

EC-72

BASIC SERVICE PROCEDURE

2005 Pathfinder

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-76

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-76

OK or NG

>> GO TO 9.

>> GO TO 4.

PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

Stop engine.

Perform

EC-88, "Accelerator Pedal Released Position Learning"

>> GO TO 5.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform

EC-88, "Throttle Valve Closed Position Learning"

>> GO TO 6.

PBIA8513J

625

50 rpm (in P or N position)

SEF058Y

625

50 rpm (in P or N position)

BASIC SERVICE PROCEDURE

EC-73

2005 Pathfinder

PERFORM IDLE AIR VOLUME LEARNING

Refer to

EC-89, "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-76

Without CONSULT-II

Start engine and warm it up to normal operating temperature.

Check idle speed.
Refer to

EC-76

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-305

●

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

EC-298

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

EC-47, "NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)"

>> GO TO 4.

625

50 rpm (in P or N position)

625

50 rpm (in P or N position)

SEF174Y

EC-74

BASIC SERVICE PROCEDURE

2005 Pathfinder

10.

CHECK IGNITION TIMING

Run engine at idle.

Check ignition timing with a timing light. Refer to

EC-76

OK or NG

>> GO TO 19.

>> GO TO 11.

11.

PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

Stop engine.

Perform

EC-88, "Accelerator Pedal Released Position Learning"

>> GO TO 12.

12.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform

EC-88, "Throttle Valve Closed Position Learning"

>> GO TO 13.

13.

PERFORM IDLE AIR VOLUME LEARNING

Refer to

EC-89, "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.

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-76

Without CONSULT-II

Start engine and warm it up to normal operating temperature.

Check idle speed. Refer to

EC-76

OK or NG

>> GO TO 15.

>> GO TO 17.

BTDC (in P or N position)

BBIA0531E

625

50 rpm (in P or N position)

625

50 rpm (in P or N position)

SEF174Y

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