Download 300557491-YD25-CR-fault-diagnosis-pdf.pdf PDF

Title300557491-YD25-CR-fault-diagnosis-pdf.pdf
TagsBelt (Mechanical) Turbocharger Diesel Engine Exhaust Gas Throttle
File Size12.4 MB
Total Pages101
Document Text Contents
Page 1

Nissan Australia. May 2010

YD25DDTi Common Rail Diesel Engine

R51 Pathfinder
D40 Navara
D22 Navara

Page 2

Foreword

The information in this Training Manual should not be interpreted as a basis for warranty
or goodwill claims against Nissan Motor Co. (Australia) Pty. Ltd. (NMA) unless so
designated.

This Technical Training Manual is intended for use by NMA & Nissan Dealership
Technical Personnel. It is not designed for the use by press or for customer distribution.

Before quoting any specifications be sure to check the relevant Service Manual and
Technical Bulletins.

Right for alteration to data and specifications at any time is reserved. Any such alterations
will be advised by Nissan through Technical and Sales Bulletins.

© 2010 Ni M t C (A t li ) Pt Ltd© 2010 Nissan Motor Company (Australia) Pty. Ltd.
Inc. Victoria

Ref: Technical Training Department.

Page 50

YD25DDTi CRD Engine
Nissan Australia. May 2010

ENGINE CONTROL SYSTEM
YD25 2010MY

48

Page 51

YD25DDTi CRD Engine
Nissan Australia. May 2010

ENGINE CONTROL SYSTEM

YD25DDTi Inputs to ECM
1a. Battery Voltage
This is an extremely important input to the ECM for
engine operation.engine operation.
Ensure that the voltage level remains stable, especially
during cranking. A situation maybe possible where there
is enough battery voltage for cranking, however there
maybe an insufficient level for the ECM to operate
properly.

1b. ECM Ground (3 in total)
Even though a decent voltage supply is available to the
Engine Control System, if the ECU or major fuel system
components do NOT have a decent Ground connection,
then correct operation of the Engine System will NOT be
possible.
Please ensure the Ground connections as shown here
are in good condition (Clean & Tight.)

Also refer to STB EL10-002

THE ECM PULSES (OUTPUTS) THE INJECTOR WITH EXTREMELY HIGH VOLTAGE (80 ~ 120V)
ALWAYS ENSURE THE GROUND CONNECTIONS IN THE ENGINE BAY ARE MAINTAINED

2. Ignition Switch
The ECM needs to know if the engine is being cranked, if
the Ignition Switch is simply ON, held in the cranking
position & of course when it is OFF.

IMPORTANT NOTE
WHEN CRANKING THE ENGINE ALWAYS ENSUREWHEN CRANKING THE ENGINE, ALWAYS ENSURE
THE IGNITION KEY IS HELD IN THE CRANK
POSITION FOR APPROXIMATELY 3 SECONDS .

NEVER “FLICK” THE KEY WHEN CRANKING. THE
ECM NEEDS TO SEE A MINIMUM OF 2 FULL
CRANKSHAFT / CAMSHAFT ROTATIONS DURING
CRANKING .

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CRANKING .

Page 100

YD25DDTi CRD Engine
Nissan Australia. May 2010

CONSULT III DATA MONITOR RECORD

8. (i) Touch “Sub”. The main Sub Mode screen will
appear over the Data Monitor screen.

(ii) Touch the “Data Control” Icon.

CONSULT III DATA MONITOR RECORD

9. (i) Highlight the saved file (touch the text area) with
the unique name previously given to the file.

(ii) Touch “Display” in the bottom right of the screen(ii) Touch Display in the bottom right of the screen.

10. (i) Once the next screen appears, select “Line”.
This will change the recorded data from Numerical to g
Line graph.

(ii) Ensure that the desired data is displayed. In this
example the “START SIGNAL” switching from OFF to
ON is clearly seen (large circle). This shows when the
engine was cranked over.

(iii) It’s possible to slide the data back in time to catch
f “ CO ”

98

activity well before “RECORD” was touched. Use the
small slider tab on the screen to do so. (small circle)

(iv) If so desired, you can compress more data into the
same field. Example, instead of the window showing
you 3 seconds of data – it can show 12 seconds.

Page 101

YD25DDTi CRD Engine
Nissan Australia. May 2010

CONSULT III DATA MONITOR RECORD

11. (i) Touch “All items” button under the “PRINT” title
on the RHS of the screen. A small window will then
appear as shown right.

(ii) Touch the “Save” button on the field that next

CONSULT III DATA MONITOR RECORD

(ii) Touch the Save button on the field that next
appears, followed by OK. (otherwise select print to
actually print the graphs onto paper.)

12. Once “Save” has been selected, the graphs are
converted into images which can be easily viewed on
any PC. The image files are sent to a specific folder in
the C drive of the PC as follows;

C:/Consult III/ApplicationData/Print Images

Locate this folder on the CONSULT III & create a
shortcut to the folder on the desktop.

Print Images folder

13. These files can be easily attached to the TechLine contact. There is no need to fax graphs to
techline any longer.

The graphs show that once the engine was started, the accelerator pedal was press twice & then the engine
returned to idle & then the recording finishedreturned to idle & then the recording finished.

99

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