Page 124 of 198
13B-124V4 MR-372-J84-13B000$080.mif
13B
DDCR INJECTION
Vdiag No.: 44, 48
* RCH = passenger compartment heating resistor: TOOL STATE DIAGNOSTIC TOOL DESCRIPTION
ET001 + After ignition computer feed
ET003 Engine immobiliser
ET004 Air conditioning authorised.
ET006 Code programmed
ET008 EGR solenoid valve control
ET021 High speed fan assembly request
ET022 Low speed fan assembly request
ET023 Fast idle speed request
ET038 Engine
ET042 Cruise control/speed limiter
ET076 Starting
ET079 Air conditioning present
ET088 Compressor actuation request
ET405 Clutch pedal switch
ET415 Deactivation of cruise control/speed limiter
ET563 Flow capacity function.
ET111 RCH* number set
ET112 RCH* cut-off
ET703 Cruise control/speed limiter button
ET704 Brakecontact No 1
ET705 Brakecontact No 2
DIESEL INJECTION
Fault finding – Status summary table
Page 143 of 198

13B-143V4 MR-372-J84-13B000$100.mif
13B
DDCR INJECTION
Vdiag No.: 44, 48
* Heat.: HeatingTool parameter DIAGNOSTIC TOOL DESCRIPTION
PR005 EGR valve opening setpoint
PR008 Rail pressure set point
PR009 Turbocharging pressure setpoint
PR010 Idle speed regulation setpoint
PR017 Fuel flow
PR073 Air flowmeter supply voltage
PR028 Pedal position (gang 1)
PR029 Pedal position (gang 2)
PR030 Accelerator pedal position
PR032 Inlet pressure
PR035 Atmospheric pressure
PR037 Refrigerant pressure
PR038 Rail pressure
PR051 EGR valve position feedbac
PR055 Engine speed
PR059 Inlet air temperature (invalid in K9K 728)
PR061 External air temperature
PR063 Fuel temperature
PR064 Coolant temperature
PR074 Battery voltage
PR077 EGR valve position sensor voltage
PR080 Rail pressure sensor voltage
PR081 Inlet temperature sensor voltage
PR088 Pedal potentiometer gang 2 voltage
PR089 Vehicle speed
PR125 Power absorbed by air conditioning compressor
PR127 Heat.* resistor maximum authorised power
PR130 Cruise control setpoint
PR132 Air flow
DIESEL INJECTION
Fault finding – Parameter summary table
Page 146 of 198

13B-146V4 MR-372-J84-13B000$110.mif
DIESEL INJECTION
Fault finding – Interpretation of parameters13B
DDCR INJECTION
Vdiag No.: 44, 48
CLEARING
RZ001: fault memory.
This command is used to clear stored faults from the computer's memory.
RZ002: EGR adaptives.
Run this command only when replacing the EGR valve.
RZ004: Pressure regulation parameters.
Run this command when replacing all 4 injectors at once. It enables you to reset the injector adaptive programs.
RZ005: Programming.
This command lets you reinitialise the entire computer configuration according to the vehicle.
COMMANDS
LPG - FUEL CIRCUIT tab
AC010: High-pressure pump.
This command lets you listen for the operation of the high pressure pump.
AC005 to AC008: Injectors of cylinders 1 to 4.
These commands let you listen for the injector on the selected cylinder.
AC028: Static test.
This command activates fault finding for the EGR and high pressure pump circuits.
AC029: High-pressure circuit seal check.
This command lets you check the high pressure circuit sealing after a procedure has been carried out.
AC212: New pump chamber filling.
Use this command only after replacing the high pressure pump (see High pressure pump replacement in
Replacement of components). This command is used to activate the pump repriming sequence.
IGNITION - PREHEATING tab
AC001: Preheating unit.
This command actuates the preheating unit to test the heater plug supply.
EMISSION CONTROL - OBD tab
AC002: EGR solenoid valve.
This command lets you listen to the mechanical operation of the EGR valve.
AC028: Static test.
This command activates fault finding for the EGR and high pressure pump circuits.
TURBO - INLET AIR CIRCUIT tab
AC004: Turbocharging solenoid valve.
This command lets you listen for the operation of the turbocharging solenoid valve.
Page 167 of 198

13B-167
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
V4 MR-372-J84-13B000$140.mif
DIESEL INJECTION
Fault finding – Fault finding charts13B
InjectionDDCR
Vdiag No.: 44, 48
ALP2 The engine will not start
NOTESOnly consult this customer complaint after a complete check with the diagnostic tool.
Check that the fuel tank is correctly filled and that the fuel is correct: run TEST 13 Diesel fuel conformity check.
Check the levels of engine oil and coolant.
Check the air inlet circuit by running TEST 5 Inlet circuit check.
Is the catalytic converter clogged or damaged?Replace the catalytic converter (see MR
364 (Mégane II) or MR 370 (Scénic II),
Mechanical, 19B, Exhaust, Catalytic
converter: Removal - Refitting).
Check the air inlet circuit by running TEST 2 Electrical circuit check.
Check the electrical conformity of the heater plugs (the resistance value of the heater plug must be less than 2 Ω).
Is the timing set correctly? Carry out the necessary repairs.
Visually check the condition of the engine wiring harness.
YES
NO
NO
YES
A
DDCR_V44_ALP02/DDCR_V48_ALP02
Page 170 of 198

13B-170
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
V4 MR-372-J84-13B000$140.mif
DIESEL INJECTION
Fault finding – Fault finding charts13B
InjectionDDCR
Vdiag No.: 44, 48
ALP3 The engine starts with difficulty, or starts then stalls
NOTESOnly consult this customer complaint after a complete check with the diagnostic tool.
Check that the fuel tank is correctly filled and that the fuel is correct by running TEST 13 Diesel fuel conformity
check.
Check the levels of engine oil and coolant.
Check the air inlet circuit: run test 5 Air inlet circuit check.
Is the catalytic converter clogged or damaged?Replace the catalytic converter (see MR 364
(Mégane II) or MR 370 (Scénic II),
Mechanical, 19B, Exhaust, Catalytic
converter: Removal - Refitting).
Check the electrical conformity of the heater plugs (the resistance value of the heater plug must be less than 2 Ω).
Is the timing set correctly? Carry out the necessary repairs.
Is the compression in order? Carry out the necessary repairs.
YES
NO
NO
YES
NO
YES
A
DDCR_V44_ALP03/DDCR_V48_ALP03
Page 174 of 198

13B-174
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
V4 MR-372-J84-13B000$140.mif
DIESEL INJECTION
Fault finding – Fault finding charts13B
InjectionDDCR
Vdiag No.: 44, 48
ALP5 Rough idle (pumping)
NOTESOnly consult this customer complaint after a complete check with the diagnostic tool.
Check that the fuel tank is correctly filled and that the fuel is correct by running TEST 13 Diesel fuel conformity
check.
Check the low pressure circuit by running TEST 1 Low pressure circuit check.
Using the diagnostic tool, check that the injector codes (C2I) are correctly entered on the identification screen. If
not, configure the correct injector codes using command SC002 Enter injector codes.
Visually check the condition of the engine wiring harness.
Visually check that there are no leaks on the high pressure circuit by running TEST 7 High pressure circuit
sealing check.
Is the compression in order? Carry out the necessary repairs.
Check the electrical conformity of the heater plugs (the resistance value of the heater plug must be less than 2 Ω).
Check the high pressure system by running TEST 6 High pressure system check.
Contact the Techline if the customer complaint is still present.
NO
YES
DDCR_V44_ALP05/DDCR_V48_ALP05
Page 191 of 198

13B-191
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
V4 MR-372-J84-13B000$140.mif
DIESEL INJECTION
Fault finding – Fault finding charts13B
InjectionDDCR
Vdiag No.: 44, 48
ALP16 Engine rattling, noisy engine, turbocharger noise
NOTESOnly consult this customer complaint after a full check with the diagnostic tool.
If the noise arises from the turbocharger, apply Technical Note 5164A, Noise fault finding.
Note:
Pay close attention to faulty components that might result in unjustified replacement of the turbocharger. For
example, whistling does not necessarily indicate damage to the turbocharger (this could be coming from the
exhaust, the timing, the gearbox, etc.).
Check that the fuel tank is correctly filled and that the fuel is correct by running TEST 13 Diesel fuel conformity
check.
Check the levels of engine oil and coolant.
Is the compression in order? Carry out the necessary repairs.
Check the electrical conformity of the heater plugs (the resistance value of the heater plug must be less than 2 Ω).
Using the diagnostic tool, check that the injector codes (C2I) are correctly entered on the identification screen. If
not, configure the correct injector codes using command SC002 Enter injector codes
NO
YES
A
DDCR_V44_ALP16/DDCR_V48_ALP16
Page 193 of 198

13B-193
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
V4 MR-372-J84-13B000$140.mif
DIESEL INJECTION
Fault finding – Fault finding charts13B
InjectionDDCR
Vdiag No.: 44, 48
ALP17 Blue, white or black smoke
NOTESOnly consult this customer complaint after a full check with the diagnostic tool.
Check that the fuel tank is correctly filled and that the fuel is correct by running TEST 13 Diesel fuel conformity
check.
Check the levels of engine oil and coolant.
Check that the engine has not sucked up its oil (engine racing).
Is the compression in order? Carry out the necessary repairs.
Check the electrical conformity of the heater plugs (the resistance value of the heater plug must be less than 2 Ω).
Is the catalytic converter clogged or damaged?Replace the catalytic converter (see MR 364
(Mégane II) or MR 370 (Scénic II), Mechanical,
19B, Exhaust, Catalytic converter: Removal -
Refitting).
Run TEST 5 Inlet circuit check.
Run TEST 11 Air line at the turbocharger.
Run TEST 10 Turbocharger solenoid valve check.
NO
YES
YES
NO
A
DDCR_V44_ALP17/DDCR_V48_ALP17
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