2013 RENAULT KANGOO Heating

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-13V1 MR-376-X76-13B000$030.mif
DIESEL INJECTION
Fault finding – System operation13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
Function: Air flow management
EGR valve control
The EGR system (Exhaust gas recirculation) comprises a proportional EGR valve, with a built-in valve position
feedback potentiometer. The EGR valve position is controlled by the potentiometer in a closed loop and/or by
changes in the estimated air flow.
Special feature of the K9K796 Euro 2 engine (Indonesia): The EGR solenoid valve is present on the vehicle, but not
used. It always remains closed. It must not be replaced on this vehicle (unless there is a mechanical fault).
Calculating the air flow
K9K 790 and 794 engines are not fitted with an air flowmeter. Instead, the amount of fresh inlet air is evaluated
based on the values supplied by the surrounding systems.
The (theoretical) air load is calculated using a model with various calculation parameters, which are:
– the inlet air temperature measured by a sensor located after the turbocharger and/or after the exchanger (if fitted),
– the turbocharging pressure,
– the atmospheric pressure (external air),
– the EGR valve position,
– the fuel flow,
– the engine speed.
The atmospheric pressure sensor is optional. If fitted, it sends back a signal relating to the atmospheric pressure to
an analogue port on the micro-controller. If not, atmospheric pressure is recovered based on the turbocharger
pressure and the engine field.
For K9K 792 and 796 engines, the flow of fresh air entering the engine is measured by a hot-wire ratiometric sensor.
This flowmeter is used to manage the amount of exhaust gas to be recirculated to ensure optimum recirculation
rates. A fresh air temperature sensor is integrated into the flowmeter. Air flow measurement allows closed-loop
control via the EGR valve.
Turbocharger control
K9K 796 engine:
The turbocharging system is made up of a solenoid valve which is used to control the wastegate to adjust the
absolute pressure of the inlet circuit.
K9K 790, 792, 794 engines:
The turbocharger system is controlled by the inlet pressure and does not need to be controlled by the computer.
Pre-postheating actuation
Pre-postheating actuation consists of controlling the heater plugs and the preheating warning light on the instrument
panel. The heater plugs are activated by a preheating unit (controlled by the injection computer), and the power is
supplied by the battery. After the ignition is switched on a preheating delay is activated. The indicator light comes on
for the activation period which is dependent on the battery voltage, atmospheric pressure and coolant temperature.
If the temperature is below a certain threshold, a postheating function can be used to improve the combustion
stability, and consequently engine operation (reducing unburnt particles and pollutant emissions).

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-15V1 MR-376-X76-13B000$030.mif
DIESEL INJECTION
Fault finding – System operation13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
Instrument panel display
The computer manages the data display on the instrument panel relating to engine operation.
There are six functions concerned:
–the On board diagnostics MIL (Malfunction Indicator Lamp),
– pre-postheating,
– the coolant temperature,
– engine problems; Level 1 (non-critical fault) and Level 2 (emergency stop).
– detection of water in the fuel (depending on instrument panel).
These six functions are represented using four indicator lights.
Pre-postheating and electronic fault warning light (Level 1)
This light is used to indicate that the heater plugs are preheating and as a system fault indicator light:
– Continuously illuminated during + after ignition feed: indicates preheating of the heater plugs.
– Flashing after preheating and an automatic 3-second stop indicates a Level 1 fault (the function is not working
optimally and safety levels are reduced). The user must carry out repairs as soon as possible).
Engine coolant temperature warning light (Level 2)
This indicator light is used both as an in-operation indicator light and as a system fault warning light. It illuminates for
3 seconds when the power is switched on (automatic test procedure).
Continuously illuminated during + after ignition feed: indicates engine overheating or a Level 2 fault.
OBD warning light
This warning light is used to alert the driver of any injection faults that could lead to excessive pollution, or if the OBD
system has been deactivated.
The injection computer requests illumination of the OBD warning light for a present fault only after three successive
driving cycles.
The 3 second visual inspection when the ignition is switched on (automatic test procedure managed by the
instrument panel) is carried out by the injection computer.

13B-18V1 MR-376-X76-13B000$040.mif
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-22V1 MR-376-X76-13B000$060.mif
13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
Tool fault Associated DTC Diagnostic tool name
DF001 0115Coolant temperature sensor circuit
DF002 0070Air temperature sensor circuit
DF003 2226Atmospheric pressure sensor circuit
DF005 0335Engine speed sensor circuit
DF007 0190Rail pressure sensor circuit
DF008 0225Pedal potentiometer circuit gang 1
DF009 2120Pedal potentiometer circuit gang 2
DF010 0409EGR position sensor circuit
DF014 0500Vehicle speed information circuit
DF015 0685Main relay control circuit
DF016 0403EGR control circuit
DF017 0382Preheating unit control circuit
DF018 0480Low-speed fan unit control circuit
DF019 0481High-speed fan unit control circuit
DF021 0381Preheating warning light circuit
DF022 0650OBD warning light circuit
DF024 0231Low pressure actuator control circuit
DF025 0380Preheater unit diagnostic connection
DF026 0201Cylinder 1 injector circuit control
DF027 0202Cylinder 2 injector circuit control
DF028 0203Cylinder 3 injector circuit control
DF029 0204Cylinder 4 injector circuit control
DF032 1641Thermoplunger 1 relay control circuit
DF033 1642Thermoplunger 2 relay control circuit
DF034 1643Thermoplunger 3 relay control circuit
DF037 0513Immobiliser
DF038 0606Computer
DF039 0110Inlet air temperature sensor circuit
DF047 0560Computer feed voltage
DF049 0530Refrigerant sensor circuit
DF050 0571Brake switch circuit
DIESEL INJECTION
Fault finding – Fault summary table

13B-23V1 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
DF052 0200Injector control circuit
DF053 0089Rail pressure regulation function
DF056 0100Air flow sensor circuit
DF057 2264Water in diesel fuel detector circuit
DF059 0263Misfiring on cylinder 1
DF060 0266Misfiring on cylinder 2
DF061 0269Misfiring on cylinder 3
DF062 0272Misfiring on cylinder 4
DF089 0235Inlet manifold pressure sensor circuit
DF098 0180Fuel temperature sensor circuit
DF107 062FComputer memory
DF112 0340Cylinder reference sensor circuit
DF113 0641Sensor supply voltage
DF114 0400EGR solenoid valve circuit
DF121 0325Accelerometer circuit
DF122 0651Supply voltage pedal potentiometer gang 2
DF130 0087Flow capacity function
DF159 0635Power steering relay control circuit
DF162 0655Overheating indicator light
DF195 0016Camshaft/engine speed sensor consistency
DF209 0487EGR valve position sensor circuit
DF218 0604Microcontroller
DF221 0830Clutch contact signal
DF236 106FSerious injection fault 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