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Infiniti G35 (V35). Manual - part 291

POSITIVE CRANKCASE VENTILATION

EC-45

PCV VALVE VENTILATION HOSE

Check hoses and hose connections for leaks.

Disconnect all hoses and clean with compressed air. If any hose
cannot be freed of obstructions, replace.

S-ET277

EC-46

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)

PFP:28591

Description

NBS000MV

●

If the security indicator lights up with the ignition switch in
the ON position or “NATS MALFUNCTION” is displayed on
“SELF-DIAG RESULTS” screen, perform self-diagnostic
results mode with CONSULT-II using NATS program card.
Refer to

BL-214, "IVIS (INFINITI VEHICLE IMMOBILIZER

SYSTEM-NATS)"

●

Confirm no self-diagnostic results of IVIS (NATS) is dis-
played before touching “ERASE” in “SELF-DIAG RESULTS”
mode with CONSULT-II.

●

When replacing ECM, initialization of IVIS (NATS) system
and registration of all IVIS (NATS) ignition key IDs must be
carried out with CONSULT-II using NATS program card.
Therefore, be sure to receive all keys from vehicle owner. Regarding the procedures of IVIS (NATS)
initialization and all IVIS (NATS) ignition key ID registration, refer to CONSULT-II Operation Manual,
IVIS/NVIS.

SEF543X

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-47

ON BOARD DIAGNOSTIC (OBD) SYSTEM

PFP:00028

Introduction

NBS000MW

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 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-91,

"Fail-Safe Chart"

Two Trip Detection Logic

NBS000MX

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 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 MIL lights up. The MIL 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. Specific on board diagnostic items will cause the ECM to light up 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 lighting up MIL when there is
malfunction on engine control system.

Emission-related diagnostic information

Diagnostic service

Diagnostic Trouble Code (DTC)

Service $03 of SAE J1979

Freeze Frame data

Service $02 of SAE J1979

System Readiness Test (SRT) code

Service $01 of SAE J1979

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

Service $07 of SAE J1979

1st Trip Freeze Frame data

Test values and Test limits

Service $06 of SAE J1979

Calibration ID

Service $09 of SAE J1979

DTC

1st trip DTC

Freeze Frame

data

1st trip Freeze

Frame data

SRT status

SRT code

Test value

CONSULT-II

—

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

Lighting

Blinking

Lighting

Misfire (Possible three way cata-
lyst damage) — DTC: P0300 -
P0306 is being detected

—

Misfire (Possible three way cata-
lyst damage) — DTC: P0300 -
P0306 is being detected

—

One trip detection diagnoses
(Refer to

EC-48, "EMISSION-

RELATED DIAGNOSTIC INFOR-
MATION ITEMS"

—

Except above

—

EC-48

ON BOARD DIAGNOSTIC (OBD) 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.

Emission-Related Diagnostic Information

NBS000MY

EMISSION-RELATED DIAGNOSTIC INFORMATION ITEMS

: Applicable —: Not applicable

Engine operating condition in fail-safe mode

Engine speed will not rise more than 2,500 rpm due to the fuel cut

Items

(CONSULT-II screen terms)

DTC*

SRT code

Test value/

Test limit