Nissan Frontier D40. Instruction — part 338

EVAPORATIVE EMISSION SYSTEM

EC-43

< FUNCTION DIAGNOSIS >

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EVAPORATIVE EMISSION LINE DRAWING

PBIB2654E

EC-44

< FUNCTION DIAGNOSIS >

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EVAPORATIVE EMISSION SYSTEM

ALBIA0513ZZ

1.

EVAP vapor purge line

2.

EVAP canister vent control valve
(view with bed removed)

3.

EVAP control system pressure
sensor

4.

Drain filter

5.

EVAP canister

Front

Previous page

INTAKE VALVE TIMING CONTROL

EC-45

< FUNCTION DIAGNOSIS >

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INTAKE VALVE TIMING CONTROL

Description

INFOID:0000000005273036

SYSTEM DESCRIPTION

*: This signal is sent to ECM through CAN communication line.

This mechanism hydraulically controls cam phases continuously with the fixed operating angle of the intake
valve.
The ECM receives signals such as crankshaft position, camshaft position, engine speed, and engine coolant
temperature. Then, the ECM sends ON/OFF pulse duty signals to the intake valve timing control solenoid
valve depending on driving status. This makes it possible to control the shut/open timing of the intake valve to
increase engine torque in low/mid speed range and output in high-speed range.

Sensor

Input signal to ECM

ECM function

Actuator

Crankshaft position sensor (POS)

Engine speed
Piston position

Intake valve
timing control

Intake valve timing control
solenoid valve

Camshaft position sensor (PHASE)

Engine coolant temperature sensor

Engine coolant temperature

Combination meter

Vehicle speed*

PBIB3279E

EC-46

< FUNCTION DIAGNOSIS >

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ON BOARD DIAGNOSTIC (OBD) SYSTEM

ON BOARD DIAGNOSTIC (OBD) SYSTEM

Introduction

INFOID:0000000005273037

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 lamp (MIL) on the instrument panel illuminate 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-422, "Fail-safe Chart"

.)

Two Trip Detection Logic

INFOID:0000000005273038

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 MIL will not illuminate 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 MIL illuminates. The MIL illuminates at the same time 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. Specific on board diagnostic items will cause the ECM to illuminate or blink the MIL, and
store DTC and Freeze Frame data, even in the 1st trip, as shown below.

×

: Applicable

—: Not applicable

When there is an open circuit on MIL circuit, the ECM cannot warn the driver by Illuminated 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.

Emission-related diagnostic information

Diagnostic service

Diagnostic Trouble Code (DTC)

Service $03 of SAE J1979/ISO 15031-5

Freeze Frame data

Service $02 of SAE J1979/ISO 15031-5

System Readiness Test (SRT) code

Service $01 of SAE J1979/ISO 15031-5

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

Service $07 of SAE J1979/ISO 15031-5

1st Trip Freeze Frame data

Test values and Test limits

Service $06 of SAE J1979/ISO 15031-5

Calibration ID

Service $09 of SAE J1979/ISO 15031-5

DTC

1st trip DTC

Freeze Frame

data

1st trip Freeze

Frame data

SRT code

SRT status

Test value

CONSULT-III

×

×

×

×

×

×

—

GST

×

×

×

—

×

×

×

ECM

×

×

*

—

—

—

×

—

Items

MIL

DTC

1st trip DTC

1st trip

2nd trip

1st trip

displaying

2nd trip

displaying

1st trip

displaying

2nd trip

display-

ing

Blinking

Illuminated

Blinking

Illuminated

Misfire (Possible three way cata-
lyst damage) — DTC: P0300 -
P0304 is being detected

×

—

—

—

—

—

×

—

Misfire (Possible three way cata-
lyst damage) — DTC: P0300 -
P0304 is being detected

—

—

×

—

—

×

—

—

One trip detection diagnoses
(Refer to

EC-424

.)

—

×

—

—

×

—

—

—

Except above

—

—

—

×

—

×

×

—