key RENAULT KANGOO 2013 X61 / 2.G Diesel DCM 1.2 Injection Workshop Manual

13B-2V1 MR-376-X76-13B000$010.mif
13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
1. SCOPE OF THIS DOCUMENT
This document presents the fault finding method applicable to all computers with the following specifications:
2. PREREQUISITES FOR FAULT FINDING
Documentation type:
Fault finding procedure (this manual):
– Assisted fault finding (integrated into the diagnostic tool), Dialogys.
Wiring Diagrams:
– Visu-Schéma (CD-ROM),
Type of diagnostic tools:
–CLIP + sensor
Special tooling required:
3. REMINDERS
Procedure
To run fault finding on the vehicle computers, switch on the ignition.
Depending on the type of vehicle equipment, proceed as follows:
To cut off the + after ignition feed, proceed as follows:
*VLL — Very Long LifeVehicles: LOGAN/SANDERO/THALIA 2/SYMBOL 2/
DUSTER/KANGOO VLL*
Engines: K9K 714, 718, 740, 790, 792, 794, 796, 880,
890.
Function concerned: K9 DELPHI
(DCM 1.2) COMMON RAIL direct diesel injectionName of computer: DCM 1.2 injection
Program No.: 4C
Vdiag No.: 08
Special tooling required
Diagnostic tool
Multimeter
Elé. 1590112-track computer bornier
Elé. 1681Universal bornier
Mot. 1711Injector flow measuring kit
For vehicles with key/radiofrequency remote control unit,
switch on the ignition with the key.
For vehicles with key/radiofrequency remote control unit,
switch off the ignition with the key.
DCM1.2_V08_PRELI
DIESEL INJECTION
Fault finding – Introduction

13B-11V1 MR-376-X76-13B000$030.mif
DIESEL INJECTION
Fault finding – System operation13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
An accelerometer is used to monitor some of the fuel injection deviation. This has several roles:
– Protecting the engine by detecting injection leaks (disabled on the basic version).
– Checking the pilot quantity by measuring deviation and dispersion.
By changing both the injection duration and advance, the quantity of fuel injected and the mixture's moment of
ignition can be readjusted.
Rail pressure check
The quality of combustion is influenced by the size of the atomised droplets in the cylinder.
In the combustion chamber, smaller fuel droplets will have time to burn fully, and will not produce smoke or
unburned particles. To meet emission control requirements, the droplet size, and therefore the size of the injection
holes, must be reduced.
With smaller holes, less fuel will be able to be introduced at a given pressure, which limits the power. To offset this
disadvantage, the quantity of fuel injected must be increased, which means increased pressure (and more holes in
the injector nozzles).
For the DCM 1.2 injection system, the pressure reaches 1400 bar - 1600 bar in the rail and must be constantly
regulated. The measuring circuit comprises an active pressure sensor on the rail connected to an analogue port on
the computer.
The high pressure pump is supplied at low pressure (5bar) by a built-in transfer pump. This pump supplies the rail.
The rail filling pressure is controlled by the fuel flow actuator (IMV) and the discharge pressure is controlled by the
injector valves. This compensates for pressure drops. The flow actuator enables the high pressure pump to supply
the exact quantity of diesel fuel required to maintain the rail pressure. This mechanism minimises the heat generated
and improves engine output.
In order to discharge the rail using the injector valves, the valves are actuated by short electrical pulses which are:
– short enough in amplitude not to open the injector (and pass through the return circuit from the injectors),
– long enough in time to open the valves and discharge the rail.
The fuel surplus is sent back to the fuel filter or the tank, according to its flow. If there is no fuel flow actuator control,
the rail pressure is limited by a discharge valve fitted on the pump.
New pump chamber filling procedure (pump boosting)
The pump lubrication goes through a booster cycle during which the pump is filled and pressurised before
"transferring" the diesel fuel to the rail.
This lubrication goes through programming called "filling the new pump chamber", which prohibits starting for
approximately 10 seconds (the time required to fill the pump and to start if the key is released before the end of this
"first starting" phase). Power latch is not necessary before attempting to start the vehicle again.
This procedure runs when a computer is replaced if the parameters relating to the rail pressure have not been
copied into the new computer, or otherwise, after reprogramming of the injection computer.

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DIESEL INJECTION
Fault finding – Replacement of components13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
After the computer has been programmed:
– Switch off the ignition.
– Switch on the ignition again and use the diagnostic tool to carry out the following steps:
– Use command SC001 Write saved data to restore the C2I and the engine adaptive programming.
– Run command VP010 Write VIN.
– Run command AC028 Static test.
– Run command AC154 Low speed fan assembly to test the operation of the 1st speed fan assembly.
– Run command AC153 High speed fan assembly to test the operation of the 2nd speed fan assembly.
– Run command AC250 Heating resistor 1 relay to test the operation of passenger compartment heating resistor 1.
– Run command AC251 Heating resistor 2 relay to test the operation of passenger compartment heating resistor 2.
– Run command AC100 Stop electrical consumer inhibition.
– Run command AC212 Fill new pump chamber.
– Run the starter motor without releasing the key until the engine starts (the pump reprime time until the engine starts
can be up to 20 seconds).
– After the engine has started, refer to ET637 Fill new pump chamber and check that it is Done; if not, repeat the
starting procedure.
–Stop the engine, switch off the ignition (to initialise the computer) and wait 30 seconds.
– After injection system programming, stored faults may appear in other computers.
– If DF1083 Water in diesel fuel warning light circuit appears in the injection computer: on a vehicle fitted with
a water in diesel fuel warning light, perform the fault finding operations described in DF1083 then run command
AC028 Static test; on other vehicles, do not deal with the fault.
– Clear the computer memory RZ001 Fault memory.
IMPORTANT
AFTER A (RE)PROGRAMMING OPERATION, DO NOT DISCONNECT THE BATTERY FOR AT LEAST
30 MINUTES (to carry out other work on the vehicle).
Note:
If commands SC003 Save computer data and SC001 Write saved data have been lost or do not work, after
programming the computer, enter the C2I for each injector manually by reading the C2I on each injector (see
Replacing the injectors).

13B-121V1 MR-376-X76-13B000$080.mif
DIESEL INJECTION
Fault finding – Conformity check13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
STATUS CHECK (CONTINUED 2)
NOTESOnly perform this conformity check after a thorough check with the diagnostic tool.
The values shown in this conformity check are given as a guide.
Application conditions: Engine stopped, ignition on.
FunctionParameter or status
checked or actionDisplay and notes Fault finding
Brake
contactET122:Brake switch no.
1 signalINACTIVE
INACTIVE: Brake pedal released.
ACTIVE: Brake pedal depressed.In the event of a fault, refer
to the interpretation of
status ET122.
ET123:Brake switch no.
2 signalINACTIVE
Indicates recognition of brake pedal
contacts.
INACTIVE: Brake pedal released.
ACTIVE: Brake pedal depressed.If status ET123 is
inconsistent, test the
multiplex network using
the diagnostic tool.
Clutch pedalET233:Clutch pedalRELEASED
Indicates recognition of clutch pedal
contacts.
RELEASED: Pedal released.
DEPRESSED: Pedal depressed.In the event of a fault,
consult the interpretation
of status ET233.
New pump
chamber
fillingET637:New pump
chamber fillingNOT COMPLETED
COMPLETEDNONE
KeyET227:KeyINACTIVE
PRESENCE OF + AFTER
IGNITION FEED

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13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
Tool Status Diagnostic tool title
ET003Engine immobiliser
ET007Pre-postheating control
ET008EGR solenoid valve control (not applicable to K9K796 Euro 2)
ET023Fast idle speed request
ET038Engine
ET039Brake pedal
ET116Climate control authorisation
ET122Brake switch no. 1 signal
ET123Brake switch no. 2 signal
ET164Configuration with air conditioning
ET200Fuel flow controller
ET227Key
ET233Clutch pedal
ET432Wastegate regulation
ET563Flow capacity function
ET637New pump chamber filling
DIESEL INJECTION
Fault finding – Status summary table