Air con RENAULT KANGOO 2013 X61 / 2.G Diesel DCM 1.2 Injection User Guide

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-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-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-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-26
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
DIESEL INJECTION
Fault finding – Interpretation of faults13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
DF002
PRESENT
OR
STOREDAIR TEMPERATURE SENSOR CIRCUIT
CO.1: Open circuit or short circuit to +12 V
CC.0: Short circuit to earth
1.DEF: Inconsistency
NOTESPriority 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.
Check the connection and condition of the connector of the air flow sensor, component code 799.
Check the 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 for + 12 V after ignition on connection 3FB (or 3FBA) of the air flow sensor connector.
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 earth on connection NH of the air flow sensor.
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.
DCM1.2_V08_DF002

13B-27
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
DIESEL INJECTION
Fault finding – Interpretation of faults13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
DF002
CONTINUED
Check the insulation, continuity and the absence of interference resistance on the following connections:
●3B between components 120 and 799,
●3FB (or 3FBA) of component 799,
●NH of component 799.
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 air flow sensor to ensure that it is between:
41255  < X < 47492  at - 40°C,
14260  < X < 16022  at - 20°C,
5497  < X < 6050  at 0°C,
2353  < X < 2544  at 20°C,
1114  < X < 1186  at 40°C,
569  < X < 597  at 60°C,
310  < X < 322  at 80°C,
180  < X < 185  at 100°C.
If the value is not correct, replace the air flow sensor (see MR388 (Logan/Sandero), MR451 (Duster),
Mechanical, 12A Fuel mixture, Air flowmeter: Removal – Refitting).
If the fault is still present, replace the air flowmeter (see MR388 (Logan/Sandero), MR451 (Duster), Mechanical,
12A Fuel mixture, Air flowmeter: Removal – Refitting).
If the fault is still present, contact the Techline.

13B-28
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
DIESEL INJECTION
Fault finding – Interpretation of faults13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
DF003
PRESENT
OR
STOREDATMOSPHERIC PRESSURE SENSOR CIRCUIT
CO.0: Open circuit or short circuit to earth
CC.1: Short circuit to +12 V
NOTESSpecial notes:
The atmospheric pressure sensor is built into the injection computer.
Use the Wiring Diagrams Technical Note for Logan, Sandero, Duster, Thalia 2/
Symbol 2 or Kangoo VLL.
Look for any wiring harness damage and check the condition and connection of the injection computer connectors,
component code 120.
Check the connection and condition of the injection locking relay connector.
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 connector, otherwise
replace the wiring.
Move the wiring harness between the injection computer and the battery, component code 107 to see if a change
of status occurs (Present  Stored).
Look for any damage to the wiring and check the connection and condition of the battery and its connections.
If the connector is faulty and 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.
Measure the battery voltage when the ignition is switched on.
If the battery voltage is less than 11 V, recharge the battery (see Technical Note 6014A (Renault) or Technical
Note 9859A (Dacia), Checking the charging circuit).
Check the condition and connection of the battery terminals and posts.
DCM1.2_V08_DF003