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Nissan Almera Tino V10. Manual - part 612

EC-1274

[YD (WITHOUT EURO-OBD)]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

Relationship Between MI, DTC, CONSULT-II and Driving Patterns

*1: When a malfunction is detected, MI

will light up.

*2: MI will not light up after ignition

switch is turned OFF.

*3: When a malfunction is detected for

the first time, the DTC will be stored
in ECM.

*4: Other screens except SELF-DIAG-

NOSTIC RESULTS & DATA MONI-
TOR (AUTO TRIG) cannot display
the malfunction. DATA MONITOR
(AUTO TRIG) can display the mal-
function at the moment it is detected.

*5: The DTC will not be displayed any

longer after vehicle is driven 40 times
(Driving pattern A) without the same
malfunction. (The DTC still remain in
ECM.)

MBIB0622E

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-1275

[YD (WITHOUT EURO-OBD)]

Driving Pattern A

●

The A counter will be cleared when the malfunction is detected regardless of (1) - (4).

●

The A counter will be counted up when (1) - (4) are satisfied without the same malfunction.

●

The DTC will not be displayed after the A counter reaches 40.

MBIB0923E

EC-1276

[YD (WITHOUT EURO-OBD)]

TROUBLE DIAGNOSIS

PFP:00004

Trouble Diagnosis Introduction

EBS014SS

INTRODUCTION

The engine has an ECM to control major systems such as fuel injec-
tion control, fuel injection timing control, glow control system, etc.
The ECM accepts input signals from sensors and instantly actuators.
It is essential that both input and output signals are proper and sta-
ble. At the same time, it is important that there are no malfunctions
such as vacuum leaks, or other malfunctions with the engine.

It is much more difficult to diagnose a malfunction that occurs inter-
mittently rather than continuously. Most intermittent malfunctions are
caused by poor electric connections or improper wiring. In this case,
careful checking of suspected circuits may help prevent the replace-
ment of good parts.

A visual check only may not find the cause of the incidents. A road
test with CONSULT-II or a circuit tester connected should be per-
formed. Follow the

EC-1277, "WORK FLOW"

Before undertaking actual checks, take a few minutes to talk with a
customer who approaches with a driveability complaint. The cus-
tomer can supply good information about such incidents, especially
intermittent ones. Find out what symptoms are present and under
what conditions they occur. A Diagnostic Worksheet like the example
on next page should be used.
Start your diagnosis by looking for conventional incidents first. This
will help troubleshoot driveability incidents on an electronically con-
trolled engine vehicle.

MEF036D

SEF233G

SEF234G