2011 RENAULT SCENIC ABS

13B-305
MR-372-J84-13B200$756.mif
V13
DIESEL INJECTION
Fault finding – Interpretation of commands
EDC16
Program No: C1
Vdiag No: 18, 1C, 20,
50, 58, 5C
13B
*ocr: opening cyclic ratioAC011
RAIL PRESSURE REGULATOR
NOTESthis command is used to check:
– the operation of the pressure regulator,
– and the high pressure injection circuit.
Step 1:
Measure the resistance of the pressure regulator between connections 3HI and 3FB.
- Replace the regulator if its resistance is not 2.5 Ω < X < 3.5 Ω at 20°C.
Check the continuity and absence of interference resistance of the following connections:
– connection code 3HI,
– connection code 3FB.
Between components 120 and 11 0 5.
If the connection or connections are faulty and there is a repair method (see Technical Note 6015A, Repairing
electrical wiring, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
If, when running command AC011, you can hear a slight whistling noise and a clicking noise from the pressure
regulator, go to step 2. Otherwise, check that the computer output stage is functioning correctly:
→Using a voltmeter:
With the solenoid valve connected, connect the voltmeter earth lead to connection 3HI of component 1105 and
the positive lead to connection 3FB (Laguna II and Mégane II) or 3FB1 (Scénic II). Clear any fuel pressure
solenoid valve faults, then run command AC011:
The voltmeter should display two successive voltages: ~2.5V for an OCR* of 20%, then ~8.75V for an OCR* of
70% (ten cycles)
→Or using an oscilloscope (range 5 V/division and time base 1 ms/division):
With the solenoid valve connected, connect the oscilloscope earth to the battery earth and the positive test pin to
connection 3HI of component 11 05; clear any fuel pressure solenoid valve faults then run command AC011:
The oscilloscope should display a square wave signal of 12.5 V in amplitude at a frequency of 185 Hz (with an
OCR* passing successively from 20 to 70%).
if the measurement is correct, replace the regulator.
If the measurement is not correct, contact the Techline.
EDC16_V50_AC011/EDC16_V58_AC011/EDC16_V5C_AC011/EDC16_V18_AC011/EDC16_V1C_AC011/EDC16_V20_AC011

13B-307
MR-372-J84-13B200$756.mif
V13
DIESEL INJECTION
Fault finding – Interpretation of commands
EDC16
Program No: C1
Vdiag No: 18, 1C, 20,
50, 58, 5C
13B
AC012
DAMPER VALVE
NOTESCarry out this interpretation:
–after DF226 Damper valve,
– or after a customer complaint (starting faults, poor performance).
Ignition on and engine stopped.
Check the continuity, insulation and absence of interference resistance on the following connections:
– connection code NT (Laguna II) between component 1461 and the earth NT.
– connection code N (Scénic II and Mégane II) between component 1461 and the earth N.
– connection code 3FB (Laguna II) between components 1461 and 597.
– connection code 3FB2 (Scénic II) between components 1461 and 1337.
– connection code 3FB (Mégane II) between components 1461 and 1337.
If the connection or connections are faulty and there is a repair method (see Technical Note 6015A, Repairing
electrical wiring, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Check for + 12 V on connection 3FB (Laguna II and Mégane II) or 3FB2 (Scénic II) of component 1461.
Repair if necessary.
Check for earth on connection N (Scénic II and Mégane II) or NT (Laguna II) of component 1461.
Repair if necessary.
Check that the damper valve is open.
If not, clean or replace the air vent unit.
Actuate the valve using command AC012 and check its travel and rest position.
Check the operation of the computer output stage with a voltmeter:
Actuate the valve with command AC012.
If the solenoid valve opens (vacuum pump pressure gauge returns to atmospheric pressure), go to step C.
Otherwise, with the solenoid valve connected, check the operation of the computer output stage with a voltmeter
between connections 3FB (Laguna II and Mégane II) or 3FB2 (Scénic II) and N (Scénic II and Mégane II) or
NT (Laguna II) of component 1461.
The voltmeter should display three ON-OFF cycles (12.5 V then return to 0 V).
If the measurement is correct, replace the damper valve.
If the measurement does not show any operation, contact the Techline.
EDC16_V50_AC012/EDC16_V58_AC012/EDC16_V5C_AC012/EDC16_V18_AC012/EDC16_V1C_AC012/EDC16_V20_AC012

13B-308
MR-372-J84-13B200$756.mif
V13
DIESEL INJECTION
Fault finding – Interpretation of commands
EDC16
Program No: C1
Vdiag No: 18, 1C, 20,
50, 58, 5C
13B
AC031
THERMOPLUNGER NO. 3 RELAY
(check that the computer is correctly configured)
NOTESThere must be no present or stored faults.
Perform this fault finding procedure if there is a fault in the command menu, or a
passenger compartment heating/demisting fault.
Refer to the Wiring diagrams Technical Note for the vehicle to locate the fuses and
relays concerned.
vdiag 50, 58, 5C:
If the additional heater no. 3 relay does not operate when running command AC031:
check the engine management computer connections.
Check the connections of thermoplunger no. 3.
Repair if necessary.
Check for + 12 V after ignition supply on connections 3FB and 3JAB of component 1069.
If there is no + 12 V supply, refer to the interpretation of fault DF015 Main relay control circuit.
Repair if necessary.
Check the continuity, absence of interference resistance and insulation to earth of connection 3JAB
between components 120 and 597.
If the connection or connections are faulty and there is a repair method (see Technical Note 6015A, Repairing
electrical wiring, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Check for + 12 V after ignition supply between connections 3FB and BP9 of component 1069 and connection
3JAC of component 1074.
Measure the resistance of thermoplunger no. 3.
Replace thermoplunger no. 3 if the resistance is greater than 2 Ω.
Replace the water heater interface unit if necessary.
Using a test light, check that the water heater interface unit is properly earthed on connections 3FB and
3JAB between components 120 and 1069.
If the fault is still present, contact the techline.
EDC16_V50_AC031/EDC16_V58_AC031/EDC16_V5C_AC031/EDC16_V18_AC031/EDC16_V1C_AC031/EDC16_V20_AC031

13B-312
MR-372-J84-13B200$756.mif
V13
DIESEL INJECTION
Fault finding – Interpretation of commands
EDC16
Program No: C1
Vdiag No: 18, 1C, 20,
50, 58, 5C
13B
AC063
THERMOPLUNGER NO. 1 RELAY
(check that the computer is correctly configured).
NOTESThere must be no present or stored faults.
Perform this fault finding procedure if there is a fault in the command menu, or a
passenger compartment heating/demisting problem.
Refer to the Wiring diagrams Technical Note for the vehicle to locate the fuses and
relays concerned.
vdiag 50, 58, 5c:
If the additional heater no. 1 relay does not operate when running command AC063:
check the engine management computer connections.
Check the connections of thermoplunger no. 1.
Repair if necessary.
Check for + 12 V after ignition supply on connections BP9 and 3FB of component 1067.
If there is no + 12 V supply, refer to the interpretation of fault DF015 Main relay control circuit.
Repair if necessary.
Check the continuity, absence of interference resistance and insulation on connection 3JA between
components 120 and 597.
If the connection or connections are faulty and there is a repair method (see Technical Note 6015A, Repairing
electrical wiring, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Using a test light, check the supply by running command AC063 on connection 3JB between components 1067
and 898.
Measure the resistance of thermoplunger no. 1.
Replace thermoplunger no. 1 if the resistance is greater than 2 Ω.
Replace the water heater interface unit if necessary.
Using a test light, check that the water heater interface unit is properly earthed by running command AC063
on connection 3JA between components 120 and 597.
If the fault is still present, contact the techline.
EDC16_V50_AC063/EDC16_V58_AC063/EDC16_V5C_AC063/EDC16_V18_AC063/EDC16_V1C_AC063/EDC16_V20_AC063

13B-314
MR-372-J84-13B200$756.mif
V13
DIESEL INJECTION
Fault finding – Interpretation of commands
EDC16
Program No: C1
Vdiag No: 18, 1C, 20,
50, 58, 5C
13B
AC064
THERMOPLUNGER NO. 2 RELAY
(check that the computer is correctly configured).
NOTESThere must be no present or stored faults.
Perform this fault finding procedure if there is a fault in the Command menu, or a
passenger compartment heating/demisting problem.
Refer to the Wiring Diagram Technical Notes for the vehicle to locate the fuses and
relays concerned.
vdiag 50, 58, 5c:
If the additional heater no. 2 relay does not operate when running command AC064:
check the engine management computer connections.
Check the connections of thermoplungers 2 and 3.
Repair if necessary.
Check for + 12 V after ignition supply on connections 3FB and BP91 of component 1068.
If there is no + 12 V supply, refer to the interpretation of fault DF015 Main relay control circuit.
Repair if necessary.
Check the continuity, absence of interference resistance and insulation to earth of connection 3JAA
between components 120 and 597.
If the connection or connections are faulty and there is a repair method (see Technical Note 6015A, Repairing
electrical wiring, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Check for + 12 V after ignition feed between connections BP91 and 3JAD of component 597 and connection
3JAD of components 1072 and 1073.
Measure the resistance of thermoplungers 2 and 3.
Replace thermoplunger no. 2 or 3 if the resistance is greater than 2 Ω.
Replace the water heater interface unit if necessary.
Using a test light, check that the water heater interface unit is properly earthed on connection 3JAA between
components 120 and 597.
if the fault is present, contact the techline.
EDC16_V50_AC064/EDC16_V58_AC064/EDC16_V5C_AC064/EDC16_V18_AC064/EDC16_V1C_AC064/EDC16_V20_AC064

13B-316
MR-372-J84-13B200$756.mif
V13
DIESEL INJECTION
Fault finding – Interpretation of commands
EDC16
Program No: C1
Vdiag No: 18, 1C, 20,
50, 58, 5C
13B
AC195
ELECTRIC COOLANT PUMP
NOTESthis command allows you to check the operation of the electric coolant pump.
Check the electric coolant pump relay (A 20A) and check that it is operating correctly.
Check the injection computer connections.
Repair if necessary.
Check the continuity between connections 3FB of component 597 (Laguna II).
If these checks are correct, check the continuity and absence of interference resistance on the following
connections:
– connection code 3VG between components 120 and 597 (Laguna II) or 299 (Mégane II and Scénic II)
– connection code 3FB of component 597 (Laguna II)
– connection code 3FB2 between components 299 and 1337 (Scénic II).
– connection code 3FB between components 299 and 1337 (Mégane II).
– connection code 3VH between components 597 (Laguna II) or 299 (Mégane II and Scénic II) and 369.
– connection code MAS between component 369 and earth MAS.
If the connection or connections are faulty and there is a repair method (see Technical Note 6015A, Repairing
electrical wiring, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
If the fault is still present, contact the techline.
EDC16_V50_AC195/EDC16_V58_AC195/EDC16_V5C_AC195/EDC16_V18_AC195/EDC16_V1C_AC195/EDC16_V20_AC195

13B-318
MR-372-J84-13B200$828.mif
V13
13B
DIESEL INJECTION
Fault finding – Fault Finding Chart
ALP 1 No dialogue with engine management computer
Try to establish dialogue with a computer on another vehicle to check that the diagnostic tool is not faulty.
Check the battery voltage and carry out the operations necessary to obtain the correct voltage
(9.5V If the tool is not at fault, and dialogue cannot be established with any other computer on the same vehicle, the
cause could be a faulty computer interfering on the multiplex network.
disconnect the engine management computer.
try to establish dialogue with another computer.
if the fault is still present, reconnect the computer and proceed by elimination by successively disconnecting all
the following computers (according to wiring diagram and equipment): air conditioning, airbag, abs and esp, uch,
instrument panel, central communication unit, proximity sensor.
try to establish a dialogue between each disconnection:
if, after a disconnection, you manage to establish dialogue, perform the fault finding procedure for the relevant
computer.
Carry out a fault finding procedure on the multiplex network using the diagnostic tool.
Check for the injection fuses on the protection and switching unit and/or in the engine fuse box and check their
condition.
Check the connection of the computer connectors and the condition of its connections.
Check the injection computer earths (quality, oxidation, tightness of earth bolts on the battery terminal).
Check that the supply to the computer is correct:
Earth on connections NT (Laguna II) or N (Scénic II and Mégane II) of component 120.
+ after ignition feed on connection AP29 (Laguna II) or AP15 (Scénic II and Mégane II) of component 120.
Check that the power supply to the diagnostic socket is correct:
– + before ignition feed on connection BP32 (Scénic II and Mégane II) or BCP4 (Laguna II) of component
225.
– + after ignition feed on connection AP43 (Scénic II and Mégane II) or AP10 (Laguna II) of component
225.
– Earth on connections MAN and NAM (Scénic II and Mégane II) or MA and NAP (Laguna II) of component
225.
If dialogue has still not been established after these checks, contact the techline.
AFTER REPAIRCarry out a road test followed by a complete check with the diagnostic tool.
EDC16_V50_ALP1/EDC16_V58_ALP1/EDC16_V5C_ALP1/EDC16_V18_ALP1/EDC16_V1C_ALP1/EDC16_V20_ALP1 EDC16
Program No.: C1
Vdiag no.: 18, 1C, 20,
50, 58, 5C
MR-372-J84-13B200$828.mif

13B-323
MR-372-J84-13B200$828.mif
V13
DIESEL INJECTION
Fault finding – Fault Finding Chart
EDC16
Program No.: C1
Vdiag no.: 18, 1C, 20,
50, 58, 5C
13B
ALP 4
CONTINUED
Check the injector operation: run test 9.
If the fault is still present
Check the conformity of the accelerator pedal position sensor, the brake pedal sensor, the atmospheric pressure
sensor, the exhaust gas recirculation valve and the damper valve.
Check the consistency of the signal: of the air flowmeter, of the engine coolant temperature sensor, of the fuel
temperature sensor and of the engine speed.
Check the connections, continuity and absence of interference resistance on the air flow sensor (run DF056 Air
flow sensor circuit, 2.DEF), the engine coolant temperature sensor (run DF001 Coolant circuit, 1.DEF), and
the engine speed (run DF195 Engine speed / camshaft sensor consistency, 2.DEF).
Check:
– That the diesel filter is not clogged (for the test, see DF053 Rail pressure regulation function 2.def).
– That there are no leaks on the high and low pressure diesel circuits, run Test 4 Turbocharged air inlet circuit
check.
– That the oil vapour rebreathing system is connected.
– The flow regulator (jammed / seized), apply the interpretation of command AC011 Rail pressure regulator.
– Check the timing setting (and the position of the high pressure pump pinion)
– Check the engine compressions (cylinder compression balance with the Compression test function on the
CLIP Technic tool).
– Measure the engine compressions with the special tool
– If the fault is still present, contact the techline.
AFTER REPAIRCarry out a road test followed by a complete check with the diagnostic tool.