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

13B-12V1 MR-376-X76-13B000$030.mif
DIESEL INJECTION
Fault finding – System operation13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
Idling speed regulation
The computer handles the calculation of idling speed. This has to take account of the instantaneous power level to
be supplied, according to the following factors:
– engine coolant temperature,
– gear ratio engaged,
– battery charge,
– electrical consumers (Additional heating, Air conditioning, Fan Unit, electric windows, etc.) active or inactive,
– system faults detected.
Individual injector correction (C2I)
The DCM 1.2 system injectors must be calibrated with correction values so that their flow may be adjusted precisely.
Each injector is calibrated for different pressures on a test bench, and its specifications are shown on a label
attached to the body of the injector holders. These individual correction values are then entered into the computer
EEPROM, which can then control the injectors, taking their manufacturing variations into account.
Measuring the angular position (Cylinder reference sensor)
The angular position is measured using a magneto-inductive sensor triggered by machined teeth on the shaft
flywheel. This flywheel has sixty teeth separated by six degrees minus two missing teeth, that form a notch.
A second sensor (Hall effect) triggered by a machined tooth on the high pressure pump drive pulley (synchronised
with the camshaft), which rotates at half the engine speed, supplies an injection cycle running signal. By comparing
the signals from these two sensors, the computer's APS module (Angular Position Subsystem) is able to supply the
synchronisation components to the system assembly, namely:
– the angular position of the flywheel
– the speed and number of the active injector
– the injection cycle progress.
This module also supplies the system with the engine speed signal.
Flow capacity function (VLC)
Because of the combination of several parameters such as the diesel fuel temperature, part wear, clogging of the
diesel filter etc., the system limit may be reached during its service life. If this happens, the rail pressure cannot be
maintained because the pump lacks the necessary capacity. If the pump lacks the necessary capacity, this
programming will therefore reduce the requested flow to a value that will enable the pressure monitoring system to
control the pressure again.
The customer may have noticed a loss of vehicle performance when this program is activated (confirmed by status
Flow capacity function). This is part of normal operation.

13B-14V1 MR-376-X76-13B000$030.mif
DIESEL INJECTION
Fault finding – System operation13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
Functions included
Air conditioning management assistance
On models with air conditioning, the DCM 1.2 system allows the air conditioning to be deactivated under certain
operating conditions:
– when requested by the driver,
– when starting the engine,
– if the engine overheats (in order to reduce the power the engine has to supply),
– when the engine speed is kept at a very high level (to protect the compressor),
– during transition phases (eg. high acceleration demand for overtaking, anti-stalling and moving off). These
conditions are only taken into account if they do not occur repeatedly, so as to prevent system instabilities (erratic
deactivation),
– when certain faults appear.
Cold loop air conditioning management
The air conditioning system is a cold loop system and is managed by the injection computer which is responsible for:
– managing the cooling request according to passenger compartment controls and the refrigerant fluid pressure
value,
– calculating the power absorbed by the compressor from the refrigerant pressure,
– determining the fan unit commands according to the vehicle speed and the refrigerant fluid pressure.
The driver requests the air conditioning to be switched on by means of the ventilation selector coupled to a switch.
This cooling request may or may not be authorised depending on the refrigerant fluid pressure measured. If this
pressure is outside the operating limits, the cold loop program is not activated.
Thermal regulation of the passenger compartment heating circuit
Engines with direct injection systems are characterised by the direct injection of fuel into the combustion chamber.
This leads to heat being lost through the upper part of the engine and consequently, the cylinder head cooling
system is smaller in size.
The effect of this is that the temperature of the coolant which flows through this circuit rises more slowly. This
coolant is also used by the passenger compartment heating system. In very cold conditions, it is therefore difficult to
achieve a comfortable passenger compartment temperature quickly.
To reduce the time taken to warm up the system, air heating resistors, called passenger compartment heating
resistors, are fitted in the passenger compartment heating circuit. The DCM 1.2 injection computer determines
whether it is necessary to physically control the passenger compartment heating resistors. The injection computer
determines, on the one hand, limitation of the passenger compartment heating resistor power control depending on
the alternator charge, and on the other hand, the inhibition of the passenger compartment heating resistors
according to the engine speed, load and vehicle speed.Note:
Fan unit control requests are made from the injection computer.
These requests depend on the air conditioning, but also on the engine coolant temperature and vehicle speed.

13B-17V1 MR-376-X76-13B000$040.mif
13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
COMPUTER REPLACEMENT, PROGRAMMING AND REPROGRAMMING OPERATIONS
The system can be programmed via the diagnostic socket using the diagnostic tool (see Technical Note 3585A
Computer programming and reprogramming procedure and Technical Note 9869A Computer programming
and reprogramming procedure and following the instructions provided by the diagnostic tool).
Before removing the computer in After-Sales, save the computer data using the diagnostic tool by running
command SC003 Save computer data. This command saves the following information:
–C2I parameters (individual injector correction) and engine parameters,
–Measuring system information,
–Injection system reset data. IMPORTANT
– Switch on the diagnostic tool (mains or cigarette lighter supply).
– Connect a battery charger.
– Switch off all electrical consumers (lights, interior lights, air conditioning, radio/CD, etc.).
– Wait for the engine to cool (engine coolant temperature below 60°C and air temperature below 50°C).
IMPORTANT
It is not possible to try an injection computer coming from the Parts Department because it will no longer be
possible to use it on another vehicle.
DIESEL INJECTION
Fault finding – Replacement of components

13B-24V1 MR-376-X76-13B000$060.mif
DIESEL INJECTION
Fault finding – Fault summary table13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
Tool fault Associated DTC Diagnostic tool name
DF242 0654Engine speed signal output
DF261 0045Turbocharger actuator circuit
DF427 2263Turbocharger actuator control
DF433 0656Fuel consumption signal (ADAC)
DF489 0645Air conditioning compressor control
DF532 2502Alternator charge signal
DF631 0703Brake light switch signal
DF859 0170Injector programming cycle not done
DF886 2269Presence of water in the diesel fuel
DF1083 3264Water in diesel fuel warning light circuit

13B-25
AFTER REPAIRDeal with any faults declared by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
V1 MR-376-X76-13B000$071.mif
13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
DF001
PRESENT
OR
STOREDCOOLANT TEMPERATURE SENSOR CIRCUIT
CO.1: Open circuit or short circuit to +12 V
CC.0: Short circuit to earth
NOTESSpecial notes:
If fault DF001 is present, the preheating time is greater than 10 seconds and the
engine fan switches on at low speed (Fan assembly 1). If there is a fault on Fan
assembly 1, then Fan assembly 2 switches on (on vehicles fitted with air conditioning).
Use the Wiring Diagrams Technical Note for Logan, Sandero, Duster, Thalia 2/
Symbol 2 or Kangoo VLL.
Check the condition and connection of the coolant temperature sensor connector, component code 244.
Check the connection and condition of the injection computer connector, component code 120.
If the connectors are faulty and if there is a repair procedure (see Technical Note 6015A (Renault) or Technical
Note 9804A (Dacia), Electrical wiring repair, Wiring: Precautions for repair), repair the connectors, otherwise
replace the wiring.
Check the insulation, continuity and the absence of interference resistance on the following connections:
●3C between components 244 and 120,
●3JK between components 244 and 120,
●M (or NH) of component 244,
●42A between components 244 and 247.
If the connection(s) are faulty and if there is a repair procedure (see Technical Note 6015A (Renault) or
Technical Note 9804A (Dacia), Repairing electrical wiring, Wiring: Precautions for repair), repair the wiring,
otherwise replace it.
Measure the resistance of the coolant temperature sensor between connections 3JK and 3C of component 244.
11.5 k < X < 13,5 k at -10°C,
2140  < X < 2364  at 25°C,
773  < X < 851  at 50°C,
275  < X < 291  at 80°C,
112  < X < 118  at 110°C.
If the value is not correct, replace the coolant temperature sensor (see MR 388 (Logan/Sandero), MR 451
(Duster), MR 423 (Thalia 2/Symbol 2) or MR 374 (Kangoo VLL), Mechanical, 19A Cooling, Coolant
temperature sensor: Removal – Refitting).
DCM1.2_V08_DF001
DIESEL INJECTION
Fault finding – Interpretation of faults

13B-71
AFTER
REPAIRDeal with any faults declared by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
V1 MR-376-X76-13B000$072.mif
DIESEL INJECTION
Fault finding – Interpretation of faults13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
DF049
PRESENT
OR
STOREDREFRIGERANT SENSOR CIRCUIT
CO.1: Open circuit or short circuit to + 12 V
CC.0: Short circuit to earth
NOTESConditions for applying the fault finding procedure to a stored fault:
Apply the fault finding procedure below if the fault is present or stored.
Priority when dealing with a number of faults:
– DF113 Sensor supply voltage.
Special notes:
Use the Wiring Diagrams Technical Note for Logan, Sandero, Duster, Thalia 2/
Symbol 2 or Kangoo VLL.
Display PR037 Refrigerant pressure; if the value is less than 2 bar, top up the refrigerant fluid (see MR 388
(Logan/Sandero), MR 423 (Thalia 2/Symbol 2), MR 451 (Duster), or MR 374 (Kangoo VLL), Mechanical, 62A,
Air conditioning, Refrigerant circuit: Draining – Filling).
Move the wiring harness between the injection computer, component code 120 and the refrigerant pressure
sensor, component code 1202 to see if the status changes (present
 stored).
Look for any damage to the wiring and check the condition and connection of the refrigerant pressure sensor and
its connections.
If the connector is faulty and if there is a repair procedure (see Technical Note 6015A (Renault) or Technical
Note 9804A (Dacia), Electrical wiring repair, Wiring: Precautions for repair), repair the connector, otherwise
replace the wiring.
Check the connection and condition of the injection computer connector, component code 120.
If the connector is faulty and if there is a repair procedure (see Technical Note 6015A (Renault) or Technical
Note 9804A (Dacia), Electrical wiring repair, Wiring: Precautions for repair), repair the connector, otherwise
replace the wiring.
DCM1.2_V08_DF049

13B-112
AFTER
REPAIRDeal with any faults declared by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
V1 MR-376-X76-13B000$072.mif
DIESEL INJECTION
Fault finding – Interpretation of faults13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
DF489
PRESENT
OR
STOREDAIR CONDITIONING COMPRESSOR CONTROL
CO.0: Open circuit or short circuit to earth
CC.1: Short circuit to + 12 V
NOTESCondition for applying the fault finding procedure to a stored fault.
The fault is declared present after starting the engine and switching on the air
conditioning or running command AC180 Air conditioning relay compressor.
Special notes:
Use the Wiring Diagrams Technical Note for Logan, Sandero, Duster, Thalia 2/
Symbol 2 or Kangoo VLL.
Check the condition of the clips of the cold loop/air conditioning relay on the engine fuse and relay board (see the
relay board wiring diagrams for the vehicle concerned).
Replace the clips if necessary.
With the ignition on, check for + 12 V on connection 3FB (or 3FB2) of the cold loop/air conditioning relay,
component code 474.
If the connection is faulty and if there is a repair procedure (see Technical Note 6015A (Renault) or Technical
Note 9804A (Dacia), Electrical wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise
replace it.
Connect the bornier in place of the computer and check the insulation, continuity and the absence of
interference resistance on the following connection:
●38K between the components 120 and 474.
If the connection is faulty and if there is a repair procedure (see Technical Note 6015A (Renault) or Technical
Note 9804A (Dacia), Electrical wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise
replace it.
Check the resistance value of the cold loop/air conditioning relay between connections 3FB (or 3FB2) and 38K
of the relay.
If the resistance is not between: 75  < X < 85  at 25°C, replace the relay.
If the fault is still present, replace the cold loop/air conditioning relay.
DCM1.2_V08_DF489

13B-119V1 MR-376-X76-13B000$080.mif
13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
STATUS CHECK
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
EngineET038:EngineNOT RUNNING NONE
Engine
immobiliserET003:Engine
immobiliserINACTIVE
Indicates the status of the
immobiliser system.
INACTIVE: The injection computer
has recognised the immobiliser code
transmitted by the UCH.
ACTIVE: The injection computer
does not recognise the immobiliser
code transmitted by the UCH.If status ET003 is
inconsistent, consult the
fault finding procedure for
the UCH (See 82D,
Access – Security).
Air
conditioningET164:Configuration
with air
conditioningYES - NO
States whether the vehicle is fitted
with air conditioning or not.
YES: Air conditioning is detected by
the injection computer.
NO: Air conditioning is not detected
by the injection computer.If not consistent with the
vehicle equipment, test the
multiplex network and
follow the relevant
procedure.
Fast idle speedET023:Fast idle speed
requestABSENT
The UCH sends a fast idle request to
the injection.
ABSENT: no UCH request.
PRESENT: UCH request.If status ET023 is
inconsistent, consult the
fault finding procedure for
the UCH (See 87B,
Passenger compartment
connection unit).
DCM1.2_V08_CCONF
DIESEL INJECTION
Fault finding – Conformity check

13B-120V1 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 1)
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
Air
conditioningET116:Climate control
authorisationNO
YES: The UCH should send an
activation request to the injection.
The coolant pressure sensor must
not be defective. Satisfactory engine
operating conditions (coolant
temperature, engine load etc.).
NO: One of the above conditions has
not been fulfilled.NONE
EGRET008:EGR solenoid
valve controlINACTIVE
Shows the condition of the EGR
valve control.
INACTIVE: The valve is not
controlled by the computer.
ACTIVE: The valve is controlled by
the computer.NONE
PreheatingET007:Pre-
postheating
controlACTIVE/INACTIVE
Shows the status of the preheating
unit control.In the event of a fault,
consult the interpretation
of fault DF017 Preheating
unit control circuit.

13B-127V1 MR-376-X76-13B000$080.mif
DIESEL INJECTION
Fault finding – Conformity check13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
STATUS CHECK
NOTESOnly perform this conformity check after a complete check using the diagnostic tool.
The values shown in this conformity check are given as a guide.
Application conditions: Engine idling, warm engine, coolant temperature > 80°C.
FunctionParameter or status
checked or actionDisplay and notes Fault finding
EngineET038:EngineRUNNING NONE
Engine
immobiliserET003:Engine
immobiliserINACTIVE
Indicates the status of the
immobiliser system.
INACTIVE: The injection computer
has recognised the immobiliser code
transmitted by the UCH.
ACTIVE: The injection computer
does not recognise the immobiliser
code transmitted by the UCH.If status ET003 is
inconsistent, consult the
fault finding procedure for
the UCH (See 82D,
Access – Security).
Air
conditioningET164:Configuration
with air
conditioningYES - NO
States whether the vehicle is fitted
with air conditioning or not.
YES: Air conditioning is detected by
the injection computer.
NO: Air conditioning is not detected
by the injection computer.If not consistent with the
vehicle equipment, test the
multiplex network and
follow the relevant
procedure.
Fast idle speedET023:Fast idle speed
requestABSENT
The UCH sends a fast idle request to
the injection.
ABSENT: no UCH request.
PRESENT: UCH request.If status ET023 is
inconsistent, consult the
fault finding procedure for
the UCH (See 87B,
Passenger compartment
connection unit).