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Nissan Pathfinder (2010 year). Manual - part 247

EC-68

< FUNCTION DIAGNOSIS >

[VQ40DE]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

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

No Tools

1. 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.

2. Perform

TM-34, "OBD-II Diagnostic Trouble Code (DTC)"

. (The DTC in TCM will be erased.)

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

EC-71, "Malfunction Indicator Lamp (MIL)"

•

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.

How to Erase Permanent DTC

When a DTC is stored in ECM

• When a DTC is stored in ECM and MIL is ON, a permanent DTC is erased with MIL shutoff if the same mal-

function is not detected after performing the driving pattern for MIL shutoff three times in a raw.

When a DTC is not stored in ECM

• The erasing method depends on a permanent DTC stored in ECM. Refer to the following table.

: Applicable —: Not applicable

*: For group, refer to

EC-53, "Emission-related Diagnostic Information"

, “EMISSION-RELATED DIAGNOSTIC INFORMATION

ITEMS”.

Group A

*1: When the same malfunction is de-

tected in two consecutive trips, MIL
will illuminate.

*2: MIL will turn off after vehicle is driven

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

JSBIA0063GB

Group

Perform “DTC CONFIRMATION PROCEDURE”

for applicable DTCs.

Driving pattern

—

2010 Pathfinder

ON BOARD DIAGNOSTIC (OBD) SYSTEM

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1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

4. Turn ignition switch ON.

5. Check permanent DTC. Refer to

EC-53, "Emission-related Diagnostic Information"

, “How to Display Per-

manent DTC Status”.

6. Perform “DTC CONFIRMATION PROCEDURE” for DTCs which are the same as permanent DTCs stored

in ECM.

7. Turn ignition switch OFF and wait at least 10 seconds.

8. Turn ignition switch ON.

9. Turn ignition switch OFF and wait at least 10 seconds.

10. Turn ignition switch ON.

11. Check permanent DTC. Refer to

EC-53, "Emission-related Diagnostic Information"

, “How to Display Per-

manent DTC Status”.

12. Check that the permanent DTCs have been erased.

Group B

*1: When the same malfunction is de-

tected in two consecutive trips, MIL
will illuminate.

JSBIA0064GB

2010 Pathfinder

EC-70

< FUNCTION DIAGNOSIS >

[VQ40DE]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

NOTE:

• Drive the vehicle according to only driving patterns indicating “INCMP” in driving patterns B and D on the

“PERMANENT DTC STATUS” screen.

• When experiencing both driving pattern B and D during the same trip, the experience of driving pattern D is

counted by priority.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

4. Turn ignition switch ON.

5. Check permanent DTC. Refer to

EC-53, "Emission-related Diagnostic Information"

, “How to Display Per-

manent DTC Status”.

6. Start engine and warm it up to normal operating temperature.

7. Drive the vehicle according to driving pattern D.

CAUTION:

• Always drive at a safe speed.

• Never erase self-diagnosis results.

• If self-diagnosis results are erased during the trip of driving pattern B or D, the counter of driving

pattern B or D is reset.

• If self-diagnosis results are erased during the trip of driving pattern B or D, an experience of driv-

ing pattern B and D during the same trip is not counted up.

8. Turn ignition switch OFF and wait at least 10 seconds.

9. Turn ignition switch ON.

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

11. Turn ignition switch ON.

12. Use “PERMANENT DTC WORK SUPPORT” to drive the vehicle according to driving pattern B.

*1: When the same malfunction is de-

tected in two consecutive trips, MIL
will illuminate.

*2: After experiencing Driving pattern B

and D, permanent DTC is erased.

*3: Indication does not change unless

the ignition switch is turned from ON
to OFF twice even after experiencing
Driving pattern B or D.

JSBIA0068GB

2010 Pathfinder

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-71

< FUNCTION DIAGNOSIS >

[VQ40DE]

CAUTION:

• Always drive at a safe speed.

• Never erase self-diagnosis results.

• If self-diagnosis results are erased during the trip of driving pattern B or D, the counter of driving

pattern B or D is reset.

• If self-diagnosis results are erased during the trip of driving pattern B or D, an experience of driv-

ing pattern B and D during the same trip is not counted up.

13. Turn ignition switch OFF and wait at least 10 seconds.

14. Turn ignition switch ON.

15. Turn ignition switch OFF and wait at least 10 seconds.

16. Turn ignition switch ON.

17. Check permanent DTC. Refer to

EC-53, "Emission-related Diagnostic Information"

, “How to Display Per-

manent DTC Status”.

18. Check that the permanent DTCs have been erased.

Malfunction Indicator Lamp (MIL)

INFOID:0000000005257050

DESCRIPTION

The MIL is located on the instrument panel.
1. The MIL will illuminate when the ignition switch is turned ON

without the engine running. This is a bulb check.

If the MIL does not illuminate, refer to

GI-33, "Work Flow"

2. When the engine is started, the MIL should turn off.

If the MIL remains on, the on board diagnostic system has

detected an engine system malfunction.

ON BOARD DIAGNOSTIC SYSTEM FUNCTION

The on board diagnostic system has the following three functions.

SEF217U

2010 Pathfinder

EC-72

< FUNCTION DIAGNOSIS >

[VQ40DE]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

When there is an open circuit on MIL circuit, the ECM cannot warn the driver by illuminating 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 blinking Without DTC

When any SRT codes are not set, MIL may blink without DTC. For the details, refer to

EC-461, "DTC Index"

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.

•

ECM always returns to Diagnostic Test Mode I after the ignition switch is turned OFF.

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

1. Confirm that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds.
2. Repeat the following procedure quickly five times within 5 seconds.
a. Fully depress the accelerator pedal.
b. Fully release the accelerator pedal.
3. Wait 7 seconds, fully depress the accelerator pedal and keep it depressed for approx. 10 seconds until the

MIL starts blinking.

NOTE:

Do not release the accelerator pedal for 10 seconds if MIL starts blinking during this period. This

blinking is displaying SRT status and is continued for another 10 seconds. For the details, refer to

EC-461, "DTC Index"

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

When a malfunction is detected twice in two consecutive
driving cycles (two trip detection logic), the MIL will illumi-
nate to inform the driver that a malfunction has been detect-
ed.
The following malfunctions will illuminate 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

2010 Pathfinder

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-73

< FUNCTION DIAGNOSIS >

[VQ40DE]

4. 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 completely confirm all DTCs.

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

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

(Self-diagnostic Results)".

2. Fully depress the accelerator pedal and keep it depressed for more than 10 seconds.

The emission-related diagnostic information has been erased from the backup memory in the ECM.

3. 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

GI-

33, "Work Flow"

DIAGNOSTIC TEST MODE I — MALFUNCTION WARNING

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

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-

PBIB0092E

MIL

Condition

When the malfunction is detected.

OFF

No malfunction.

2010 Pathfinder

EC-74

< FUNCTION DIAGNOSIS >

[VQ40DE]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

tified codes can be identified by using the CONSULT-III 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 blinks. The “zero” is indicated by

the number of ten blinks. The “A” is indicated by the number of eleven blink. The length of time the 1,000th-

digit numeral blinks on and off is 1.2 seconds consisting of an ON (0.6-seconds) - OFF (0.6-seconds) cycle.

The 100th-digit numeral and lower digit numerals consist of a 0.3-seconds ON and 0.3-seconds 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-seconds OFF.

In this way, all the detected malfunctions are classified by their DTC numbers. The DTC 0000 refers to no mal-

function. (See

EC-461, "DTC Index"

)

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 "How

to Set 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 saved memory before starting trouble diagnoses.

OBD System Operation Chart

INFOID:0000000005257051

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

saved in the ECM memory.

• When the same malfunction is detected in two consecutive trips, the DTC and the freeze frame data are

saved in the ECM memory, and the MIL will come on. For details, refer to

EC-52, "Two Trip Detection Logic"

• The MIL will turn off after the vehicle is driven 3 times with no malfunction. A drive is counted only when the

recorded driving pattern is met (as saved in the ECM). If another malfunction occurs while counting, the

counter will reset.

• The DTC and the freeze frame data will be saved until the vehicle is driven 40 times (driving pattern A) with-

out the same malfunction recurring (except for Misfire and Fuel Injection System). For Misfire and Fuel Injec-

tion System, the DTC and freeze frame data will be saved until the vehicle is driven 80 times (driving pattern

PBIB3005E

2010 Pathfinder

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-75

< FUNCTION DIAGNOSIS >

[VQ40DE]

C) without the same malfunction recurring. The “TIME” in “SELF-DIAGNOSTIC RESULTS” mode of CON-

SULT-III 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 "EXPLANATION FOR DRIVING PATTERNS FOR
“MISFIRE <EXHAUST QUALITY DETERIORATION>”, “FUEL INJECTION SYSTEM”".
For details about patterns A and B under Other, see "EXPLANATION FOR DRIVING PATTERNS FOR “MISFIRE <EXHAUST QUALITY
DETERIORATION>”, “FUEL INJECTION SYSTEM”".
*1: Clear timing is at the moment OK is detected.
*2: Clear timing is when the same malfunction is detected in the 2nd trip.

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

Items

Fuel Injection System

Misfire

Other

MIL (turns off)

3 (pattern B)

DTC, Freeze Frame Data (no
display)

80 (pattern C)

40 (pattern A)

1st Trip DTC (clear)

1 (pattern C), *1

1 (pattern B)

1st Trip Freeze Frame Data
(clear)

*1, *2

1 (pattern B)

2010 Pathfinder

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