engine RENAULT SCENIC 2011 J95 / 3.G Engine And Peripherals EDC16 Workshop Manual

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-309
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
CONTINUED
vdiag 18, 1C, 20:
If the additional heater no. 3 relay does not operate when running command AC031:
Check the additional heater no. 3 relay mounting.
check the engine management computer connections.
Repair if necessary.
if the fault is still present, check as follows that this relay is controlled by the engine management computer:
Disconnect the additional heater no. 3 relay, fit a 50 to 100Ω resistor on the mounting in place of the coil and
connect a voltmeter as follows:
Positive terminal to +12 V battery.
Negative terminal to connection 3JAB of the additional heater no. 3 relay mounting.
Clear the fault and actuate the relay using command AC031.
If the voltmeter shows the battery voltage (two, 2-second ON-OFF cycles), replace the additional heater no. 3
relay.
If the voltmeter does not show the battery voltage (two 2 second ON-OFF cycles), contact the Techline.
If the additional heater no. 3 relay is supplied by command AC031, but there is still a fault with the passenger
compartment heating and demisting, check using a wiring diagram:
– the conformity of the thermoplunger maxi-fuse,
– the presence of + 12 V battery on connection BP9 of the additional heater no. 3 relay mounting,
– the conformity of the additional heater relay 3;
– the continuity between connection 3JAC of the additional heater no. 3 relay mounting and the supply terminal
for thermoplunger no. 3.
– the conformity of the thermoplunger resistance: 0.4 Ω < X < 0.5 Ω at 20 °C,
– the presence of earth at the water chamber (thermoplunger mounting).
Also check the level of the cooling circuit and that there are no leaks.
Carry out the necessary repairs.

13B-310
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
AC038
LOW-SPEED FAN ASSEMBLY RELAY
NOTESThere must be no present or stored faults.
Perform this fault finding procedure if a malfunction appears on the command menu
or after an engine cooling system or air conditioning fault.
Refer to the Wiring diagrams Technical Note for the vehicle to locate the fuses and
relays concerned.
If the low-speed fan assembly relay does not operate when command AC038 is run:
Check the low speed fan relay mounting and the connections of the engine management computer.
Repair if necessary.
If the fault is still present, check that the relay is actuated by the engine management computer as follows:
Disconnect the low-speed fan assembly relay, fit a 50 Ω < X < 100 Ω resistor on the relay mounting in place of
the coil, and connect a voltmeter as follows:
Positive terminal to the +12 V battery.
Negative terminal to connection 3JN of the low-speed fan assembly relay mounting.
Clear the fault and run command AC038
If the voltmeter indicates the battery voltage (three 2-second ON-OFF cycles), replace the relay.
If the voltmeter does not show the battery voltage (three 2 second ON-OFF cycles), contact the techline.
If the low speed fan assembly relay operates when command AC038, is run, but there is still a fan assembly
activation fault, use the wiring diagram to check the following:
– the conformity of the fan assembly maxi-fuse.
– the conformity of the low-speed fan unit relay,
– the continuity of connection 49L between components 597 and 321.
– the continuity of connection 49B between components 321 and 262.
– the conformity of the fan assembly and the continuity of connection MAS of component 262.
Carry out the necessary repairs.
EDC16_V18_AC038/EDC16_V1C_AC038/EDC16_V20_AC038

13B-311
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
AC039
HIGH-SPEED FAN ASSEMBLY RELAY
NOTESThere must be no present or stored faults.
Perform this fault finding procedure if a malfunction appears on the command menu
or after an engine cooling system or air conditioning fault.
Refer to the Wiring Diagrams Technical Note for the vehicle to locate the fuses and
relays concerned.
If the high-speed fan assembly relay does not operate when command AC039 is run:
Check the high-speed fan assembly relay mounting and the connections of the engine management computer.
Repair if necessary.
If the fault is still present, check that the relay is actuated by the engine management computer as follows:
Disconnect the high-speed fan assembly relay, fit a 50 Ω < X < 100 Ω resistor on its mounting in place of the
coil, and connect a voltmeter as follows:
Positive terminal to the +12 V battery.
Negative terminal to connection 3JP of the high-speed fan assembly relay mounting.
Clear the fault and run command AC039.
If the voltmeter indicates the battery voltage (three 2-second ON-OFF cycles), replace the relay.
If the voltmeter does not show the battery voltage (three 2 second ON-OFF cycles), contact the techline.
If the high-speed fan assembly relay is supplied by command AC039, but there remains a fault with the
triggering the fan assembly. Check using the wiring diagram:
– the conformity of the fan assembly maxi-fuse.
– + battery feed on connection BP71 of the high-speed fan assembly relay mounting,
– the conformity of the high-speed fan assembly relay,
– the continuity of connection 49B between components 597 and 262,
– the conformity of the fan assembly,
– the continuity of connection MAS of component 262.
Carry out the necessary repairs.
EDC16_V18_AC039/EDC16_V1C_AC039/EDC16_V20_AC039

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-313
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
CONTINUED
vdiag 18, 1C, 20:
If the additional heater no. 1 relay does not operate when running command AC063:
Check the additional heater no. 1 relay mounting.
Check the engine management computer connectors.
Repair if necessary.
if the fault is still present, check as follows that this relay is controlled by the engine management computer:
Disconnect the additional heater no. 1 relay, fit a 50 Ω < X < 100 Ω resistor on the relay mounting in place of the
coil, and connect a voltmeter as follows:
Positive terminal to the +12 V battery.
Negative terminal to connection 3JA of component 597.
Clear the fault and actuate the relay using command AC063.
If the voltmeter shows the battery voltage (two, 2-second ON-OFF cycles), replace the additional heater no. 1
relay.
If the voltmeter does not show the battery voltage (two, 2-second ON-OFF cycles), contact the Techline.
If the additional heater no. 1 relay is supplied by command AC063, but there is still a fault with the passenger
compartment heating and demisting, check the following using a wiring diagram:
– the conformity of the thermoplunger maxi-fuse,
–+12V battery on connection 3FB of component 597.
– the conformity of the additional heater no. 1 relay,
– the continuity between connection 3JB of component 597 and connection 3JB of component 898,
– the conformity of the thermoplunger resistance: 0.40 Ω < X < 0.50 Ω at 20°C,
– the presence of earth at the water chamber (thermoplunger mounting).
Also check the level of the cooling circuit and that there are no leaks.
Carry out the necessary repairs.

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-315
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
CONTINUED
vdiag 18, 1c, 20:
If the additional heater no. 2 relay does not operate when running command AC064,
check the additional heater no. 2 relay mounting,
check the connectors on the engine management computer.
Repair if necessary.
if the fault is still present, check as follows that this relay is controlled by the engine management computer:
Disconnect the additional heater no. 2 relay, fit a 50 Ω < X < 100 Ω resistor on the mounting in place of the coil,
and connect a voltmeter as follows:
Positive terminal to the +12 V battery.
Negative terminal to connection 3JAA of component 597.
Clear the fault and actuate the relay via command AC064.
If the voltmeter shows the battery voltage (two 2-second ON-OFF cycles), replace the additional heater 1 relay.
If the voltmeter does not show the battery voltage (two 2 second ON-OFF cycles), contact the Techline.
If the additional heater no. 2 relay is supplied by command AC064, but there is still a fault with the passenger
compartment heating and demisting, use the wiring diagram to check the following:
– the conformity of the thermoplunger maxi-fuse,
–+12V battery on connection BP91 of component 597,
– the conformity of the additional heater no. 2 relay,
– the continuity of connection 3JAD between components 597 and 1072.
– the conformity of the thermoplunger resistance: 0.40 Ω < X < 0.50 Ω at 20°C,
– the presence of earth at the water chamber (thermoplunger mounting).
Also check the level of the cooling circuit and that there are no leaks.
Carry out the necessary repairs.

13B-317
MR-372-J84-13B200$792.mif
V13
13B
DIESEL INJECTION
Fault finding – Customer complaints
NOTESbefore dealing with this customer complaint, check that there are no faults, and check
the conformity (or otherwise) of the parameters and statuses using the diagnostic
tool.
if the customer complaint is not eliminated, then proceed according to the
corresponding fault finding chart.
no dialogue with engine management computer ALP 1
starting difficult or impossibleALP 2
injection noiseALP 3
poor performanceALP 4
irregular engine operationALP 5
external leaks from the fuel circuit ALP 6
rough idleALP 7
oil leaks from the turbochargerALP 8
particle filter warning light comes on too frequently ALP 9
noise from the turbochargerALP 10
smoke from the exhaustALP 11
EDC16
Program No: C1
Vdiag No: 18, 1C, 20,
50, 58, 5C
MR-372-J84-13B200$792.mif