Nissan Qashqai (2007-2010). Manual - part 297

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-707

< FUNCTION DIAGNOSIS >

[MR20DE (WITH EURO-OBD)]

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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 MI 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.

SRT Item

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

*: 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.

SRT item

(CONSULT-III indication)

Performance 

Priority*

Required self-diagnostic items to set the SRT to “CMPLT”

Corresponding 

DTC No.

CATALYST

2

Three way catalyst function

P0420

HO2S

1

Heated oxygen sensor 1

P1133

Heated oxygen sensor 1

P1143

Heated oxygen sensor 1

P1144

Heated oxygen sensor 2

P0139

Heated oxygen sensor 2

P1146

Heated oxygen sensor 2

P1147

HO2S HTR

1

Heated oxygen sensor 1 heater

P0135

Heated oxygen sensor 2 heater

P0141

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

(= MI ON)

SRT of EGR

“INCMP”

“INCMP”

“INCMP”

“CMPLT”

EC-708

< FUNCTION DIAGNOSIS >

[MR20DE (WITH EURO-OBD)]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

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-diagnosis

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-709

< FUNCTION DIAGNOSIS >

[MR20DE (WITH EURO-OBD)]

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How to Display SRT Code

WITH CONSULT-III

Selecting “SRT STATUS” in “DTC CONFIRMATION” mode with CONSULT-III.
For items whose SRT codes are set, a “CMPLT” is displayed on the CONSULT-III screen; for items whose
SRT codes are not set, “INCMP” is displayed.

WITH GST

Selecting Service $01 with GST (Generic Scan Tool)

MALFUNCTION INDICATOR (MI)

Description

*1

“How to Read DTC and 1st Trip DTC” *2

“How to Display SRT Status”

*3

“How to Set SRT Code”

SEF573XB

EC-710

< FUNCTION DIAGNOSIS >

[MR20DE (WITH EURO-OBD)]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

The MI is located on the instrument panel.

1.

The MI will light up when the ignition switch is turned ON without
the engine running. This is a bulb check.
If the MI does not light up, check MI circuit. Refer to 

MWI-15,

"WARNING LAMPS/INDICATOR LAMPS : System Diagram"

.

2.

When the engine is started, the MI should go off.
If the MI 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 four functions.

Diagnostic Test Mode I — Bulb Check

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

MWI-

15, "WARNING LAMPS/INDICATOR LAMPS : System Diagram"

.

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

SAT652J

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 MI bulb for damage (blown, open 
circuit, etc.).
If the MI does not come on, check MI circuit.

Engine running

MALFUNCTION
WARNING

This is a usual driving condition. When a malfunction is de-
tected twice in two consecutive driving cycles (two trip de-
tection logic), the MI will light up to inform the driver that a 
malfunction has been detected.
The following malfunctions will light up or blink the MI 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 running

HEATED OXYGEN SENSOR 1 
MONITOR

This function allows the fuel mixture condition (lean or rich), 
monitored by heated oxygen sensor 1, to be read.

MI

Condition

ON

When the malfunction is detected.

OFF

No malfunction.