Nissan Qashqai (2007-2010). Manual — part 226

INTAKE VALVE TIMING CONTROL

EC-423

< FUNCTION DIAGNOSIS >

[HR16DE (WITHOUT EURO-OBD)]

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EC

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1.

Cooling fan motor

2.

Crankshaft position sensor (POS)

Vehicle front

1.

Fuel level sensor unit and fuel pump
harness connector

2.

Fuel level sensor unit and fuel pump 3.

Fuel pressure regulator

1.

ASCD clutch switch

2.

Data link connector

1.

Stop lamp switch

2.

ASCD brake pedal

3.

Accelerator pedal position sensor

JMBIA0407ZZ

JMBIA0346ZZ

JMBIA0347ZZ

JMBIA0348ZZ

EC-424

< FUNCTION DIAGNOSIS >

[HR16DE (WITHOUT EURO-OBD)]

INTAKE VALVE TIMING CONTROL

Component Description

INFOID:0000000001096772

1.

ASCD steering switch

2.

CANSEL switch

3.

RESUME/ACCELERATE switch

4.

SET/COAST switch

5.

MAIN switch

JMBIA0349ZZ

Component

Reference

Camshaft position sensor (PHASE)

EC-489, "Description"

Crankshaft position sensor (POS)

EC-485, "Description"

Engine coolant temperature sensor

EC-461, "Description"

Intake valve timing control solenoid valve

EC-497, "Description"

Vehicle speed sensor

EC-597, "Description"

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-425

< FUNCTION DIAGNOSIS >

[HR16DE (WITHOUT EURO-OBD)]

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ON BOARD DIAGNOSTIC (OBD) SYSTEM

Diagnosis Description

INFOID:0000000001098020

INTRODUCTION

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

*: When DTC and 1st trip DTC simultaneously appear on the display, they cannot be clearly distinguished from each other.

The malfunction indicator (MI) 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

EC-959,

"Fail Safe"

.)

TWO TRIP DETECTION LOGIC

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 MI 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 MI lights up. The MI 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.

DTC AND FREEZE FRAME DATA

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 MI 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 MI lights up. In other words,
the DTC is stored in the ECM memory and the MI 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 MI 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 “HOW TO
ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION”.
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 2, refer to

EC-638, "Work Flow"

. Then perform DTC CONFIR-

MATION PROCEDURE or Component Function Check to try to duplicate the malfunction. If the malfunction is
duplicated, the item requires repair.

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, absolute throttle position, base
fuel schedule and intake air temperature at the moment a malfunction is detected.

Emission-related diagnostic information

Diagnostic Trouble Code (DTC)

Freeze Frame data

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

1st Trip Freeze Frame data

DTC

1st trip DTC

Freeze Frame data

1st trip Freeze Frame

data

CONSULT-III

×

×

×

×

ECM

×

×

*

—

—

EC-426

< FUNCTION DIAGNOSIS >

[HR16DE (WITHOUT EURO-OBD)]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

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-III. The
1st trip freeze frame data can only be displayed on the CONSULT-III screen.
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.
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 “HOW TO ERASE EMISSION-
RELATED DIAGNOSTIC INFORMATION”.

How to Read DTC and 1st Trip DTC

With CONSULT-III

CONSULT-III displays the DTC in

″

SELF-DIAG RESULTS

″

mode. Examples: P0340, P1148, P1706, etc.

(CONSULT-III also displays the malfunctioning component or system.)

Without CONSULT-III

The number of blinks of the MI in the Diagnostic Test Mode II (Self-Diagnostic Results) indicates the DTC.
Example: P0340, P1148, P1706, 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, the Diagnostic Test Mode II do not indicate

whether the malfunction is still occurring or has occurred in the past and has returned to normal.
CONSULT-III can identify malfunction status as shown below. Therefore, using CONSULT-III (if avail-
able) is recommended.

DTC or 1st trip DTC of a malfunction is displayed in “SELF-DIAGNOSTIC RESULTS” mode of CONSULT-III.
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].

How to Erase DTC and 1st Trip DTC

With CONSULT-III

The emission related diagnostic information in the ECM can be erased by selecting “All Erase” in the “Descrip-
tion” of “FINAL CHECK” mode with CONSULT-III.

Without CONSULT-III

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

EC-426, "Diagnosis Description"

.

3.

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

• 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
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 (MI)

Description

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

EC-593

, or

see

MWI-15

.

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

SAT652J