Nissan Note [1632/1872] Ec 1632

Nissan Note [1632/1872] Ec 1632
EC-1632
[K9K]
TROUBLE DIAGNOSIS
Wiring Control
Diagnostics malfunctions
Removing the connectors and/or handling the wirings may temporarily remove the origin of a DTC. The mea-
surements of the electrical voltages, resistance and insulation are generally correct, especially when the DTC
is not present at the time of the analysis (stored DTC).
Visual Check
Look for impacts under the bonnet and in the passenger compartment.
Perform a careful check of the protections, insulation and correct running of wirings.
Look for traces of oxidation.
Tactile Check
While manipulating the wirings, use the diagnostic tool to detect a change in DTC states from “stored” to
“present”.
Ensure that the connectors are correctly engaged.
Apply light stresses to the connectors.
Gently manipulate the wiring harness.
If a change of state occurs, try to isolate the origin of the incident.
Examination of Each Element
Disconnect the connectors and check the appearance of the clips and blades and their crimping (no crimping
on the insulating part).
Check that the clips and blades are properly engaged in the receptacles.
Ensure that there is no rebounding of clips or blades at the time of connection.
Check the contact pressure of the clips using a suitable model blade.
Resistance Control
Test the continuity of the lines in their entirety, then section by section.
Try to create a short-circuit to earth, on the + 12 V or with another wire.
If a DTC is detected, repair or replace the wiring.
SAFETY INSTRUCTIONS
All work on components requires that the safety rules be obeyed to prevent damage or injury:
Make sure the battery is properly charged to avoid damaging the ECM with a low charge.
Use the proper tools.
Cleanliness instructions which must be followed when working on the high-pressure direct injection system:
Risks Relating to Contamination:
The system is very sensitive to contamination. The risks caused by the introduction of contamination are dam-
age to or destruction of the high-pressure injection system and the engine, seizing or incorrect sealing of a
component.
All After-Sales operations must be performed under very clean conditions. This means that no impurities (par-
ticles a few microns in size) get into the system during dismantling or into the circuits via the fuel unions.
The cleanliness guidelines must be applied from the filter through to the injectors.
What are the sources of contamination?
Contamination is caused by:
Metal or plastic chips
Paint
Fibres from cardboard, brushes, paper, clothing, cloths
Foreign bodies such as hair
Ambient atmosphere, etc.
WARNING:
Before working on the injection system, ensure that the system pressure is nearing 0 bar.
CAUTION:
it is not possible to clean the engine using a high-pressure washer because of the risk of damaging
the connections. In addition, moisture may collect in the connectors and cause electrical connection
malfunctions.
Instructions to Be Followed before Any Work is Carried Out on The Injection System:
Ensure that you have the plugs for the unions to be opened (bag of plugs available from the Parts Stores,
NISSAN part No:16830 BN700, Renault part No: 77 01 206 804). Plugs are to be used once only. After

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