13B-61
MR-372-J84-13B200$252.mif
V13
DIESEL INJECTION
Fault finding – Interpretation of faults
EDC16
Program No.: C1
Vdiag No.: 50, 58, 5C
13B
DF034
PRESENT
OR
STOREDTHERMOPLUNGER 3 RELAY CONTROL CIRCUIT
CO: Open circuit
CC.1: Short circuit to + 12 V
CC.0: Short circuit to earth
1.DEF: Inconsistent signal
NOTESConditions for applying the fault finding procedure to stored faults:
The fault is declared present after:
– the ignition is switched on,
– with the engine running,
– actuator command AC031 Thermoplunger no.3 relay.
If faults DF032 “Thermoplunger relay 1 control circuit” and DF033
“Thermoplunger relay 2 control circuit” appear, ignore them and go straight to
configuration CF030 “Thermoplunger configuration”.
Special notes:
Use bornier Elé. 1681 for all operations on the engine management computer
connectors.
check the engine management computer connections.
Check the thermoplunger connections, component code 1074.
Repair if necessary.
Check for + 12 V after ignition supply on connections BP27 and BP35 of component 1550.
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 1550.
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 on connection3JAC of component 1074.
Measure the resistance of the thermoplunger, component code 1074.
Replace the thermoplunger, component code 1074 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 3JAB between
components 120 and 1550.
If the fault is still present, contact the Techline.
AFTER REPAIRDeal with any faults.
Carry out a road test followed by another check with the diagnostic tool.
EDC16_V50_DF034/EDC16_V58_DF034/EDC16_V5C_DF034
13B-74
MR-372-J84-13B200$288.mif
V13
13B
DIESEL INJECTION
Fault finding – Interpretation of faults
DF047
PRESENT
OR
STOREDCOMPUTER FEED VOLTAGE
1.DEF: Voltage outside permitted range of values
NOTESConditions for applying the fault finding procedure to stored faults:
The fault is declared present after several starting attempts, or with the engine
running.
Special notes:
Computer operating voltage: 9 V < PR071 < 16 V.
Battery voltage that is too low can cause the level 1 fault warning light to come on
thereby causing other faults to appear.
Use bornier Elé.1681 or Elé.1590 for any operation on the injection computer
connectors.
Check the continuity and absence of interference resistance of the following connections:
– connection code AP15 between components 120 and 1337 (Scénic II et Mégane II).
– connection code AP29 between components 120 and 597 (Laguna II).
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 the condition of the injection control unit supply relay (50A) located on a relay plate in the engine
compartment connection unit (no false contact or oxidation on the relay mounting clips).
Repair if necessary.
If the fault does not reappear, start the engine and wait 1 minute.
Carry out a road test and check the system faults.
If there are no faults, fault finding is complete.
If the fault is still present, contact the Techline.
AFTER REPAIRDeal with any faults.
Carry out a road test followed by another check with the diagnostic tool.
EDC16_V50_DF047/EDC16_V58_DF047/EDC16_V5C_DF047/EDC16_V18_DF047EDC16
Program No.: C1
Vdiag No.: 18, 50,
58, 5C
13B-78
MR-372-J84-13B200$288.mif
V13
DIESEL INJECTION
Fault finding – Interpretation of faults
EDC16
Program No.: C1
Vdiag no.: 18, 1C, 20,
50, 58, 5C
13B
DF050
CONTINUED
For Laguna II:
Brake pedal released
– continuity between connections 5A and SP13,
– infinite resistance between connections 65A and SP17.
Brake pedal depressed
– infinite resistance between connections 5A and SP13,
– continuity between connections 65A and AP10.
Replace the switch if necessary.
Check the condition of fuse H 15A on the passenger compartment fuse and relay board.
Replace the fuse if necessary.
Check the supplies to the switch:
For Mégane II and Scénic II:
+ 12 V after ignition Connection SP17 of component 160
+ 12 V battery Connection BPT of component 160 (via ABS)
For Laguna II:
+ 12 V after ignition Connection SP13 of component 160
+ 12 V battery Connection AP10 of component 160
Check the continuity and insulation of connection 5A between components 120 and 160.
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.
2.DEF
NOTESNone
Check the brake pedal switch connections.
Check the condition and adjustment of the brake pedal switch.
Repair if necessary.
Check the continuity and absence of interference resistance on connection 5A between components 120
and160.
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 the conformity of the switch by consulting the interpretation of statuses ET704 Brake switch no. 1 and
ET705 Brake switch no. 2.
If the fault is still present, run fault finding on the ABS computer (see 38C, Anti-lock braking system).
AFTER REPAIRDeal with any faults.
Carry out a road test followed by another check with the diagnostic tool.
13B-82
MR-372-J84-13B200$288.mif
V13
DIESEL INJECTION
Fault finding – Interpretation of faults
EDC16
Program No.: C1
Vdiag no.: 18, 1C, 20,
50, 58, 5C
13B
DF053
CONTINUED 2
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.
With the ignition on, check for + 12 V after relay on the connection 3FB (Mégane II and Laguna II) or 3FB1
(Scénic II) of the rail pressure regulator.
If there is no + 12 V on connection 3FB (Mégane II and Laguna II) or 3FB1 (Scénic II), check the continuity
and absence of interference resistance of the following connections:
– connection code 3FB between components 11 05 and 983 (Laguna II),
– connection code 3FB1 between components 110 5 and 1337 (Scénic II),
– connection code 3FB between components 11 05 and 1337 (Mégane II).
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 the rail pressure sensor using the interpretation of DF007 Rail pressure sensor circuit.
If the fault is still present, replace the injection pump.
1.DEF
NOTESNone
Check the rail pressure regulator connectors.
Check the injection computer connections.
Check the low pressure circuit by running test 3 Low pressure circuit check.
Check the conformity of the fuel used by running test 11 Diesel fuel conformity check.
Check the overpressure valve, run test 12 Incorrect operation of the overpressure valve,
Check the operation of the injectors, run test 9 Incorrect injector operation.
Repair if necessary.
Measure the resistance of the pressure regulator between connections 3HI and 3FB (Mégane II and Laguna II)
or 3FB1 (Scénic II).
Replace the injection pump if its resistance is not 3 ohms ± 1 at 20°C.
AFTER REPAIRDeal with any faults.
Carry out a road test followed by another check with the diagnostic tool.
13B-103
MR-372-J84-13B200$324.mif
V13
DIESEL INJECTION
Fault finding – Interpretation of faults
EDC16
Program No.: C1
Vdiag no.: 18, 1C, 20,
50, 58, 5C
13B
DF086
PRESENT
OR
STOREDCOOLANT PUMP RELAY CONTROL CIRCUIT
CO.0: Open circuit or short circuit to earth
CC.1: Short circuit to +12 V
NOTESConditions for applying the fault finding procedure to stored faults:
The fault appears after the ignition has been switched off and after waiting 1 minute,
or after actuator command AC195 Electric coolant pump.
Special notes:
The control relay is located in the engine compartment connection unit.
If the fault is present:
– the EGR function is inhibited,
– the level 1 warning light is illuminated.
Use bornier Elé.1681 or Elé.1590 for any operation on the injection computer
connectors.
CO.0
NOTESNone
Check the electric coolant pump relay FM3 (A 20A or 30A) and check that it is operating correctly.
Check the injection computer connections.
Repair if necessary.
Check the continuity between the following connections:
– connection codes 3FB and 3VG of component 573 (Laguna II).
– connection codes 3VG and 3FB2 of component 573 (Scénic II).
– connection codes 3VG and 3FB of component 573 (Mégane II).
If these checks are correct,
Check the continuity and insulation to earth of the following connections:
connection code 3VG between components 120 and 573 (Laguna II) or 299 (Mégane II and Scénic II)
connection code 3FB between components 573 and 120 (Laguna II) or 1337 (Mégane II and Scénic II)
connection code 3VH between components 573 and 369.
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 earth on connection M of the turbocharger bearing coolant pump connector.
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIRDeal with any faults.
Carry out a road test followed by another check with the diagnostic tool.
EDC16_V50_DF086/EDC16_V58_DF086/EDC16_V5C_DF086/EDC16_V18_DF086/EDC16_V1C_DF086/EDC16_V20_DF086
13B-104
MR-372-J84-13B200$324.mif
V13
DIESEL INJECTION
Fault finding – Interpretation of faults
EDC16
Program No.: C1
Vdiag no.: 18, 1C, 20,
50, 58, 5C
13B
DF086
CONTINUED
CC.1
NOTESNone
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 and 3VG of component 573.
Check the continuity and insulation from + 12 V of the following connections:
– connection code 3VG between components 120 and 573.
– connection code MAS of component 369.
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.
AFTER REPAIRDeal with any faults.
Carry out a road test followed by another check with the diagnostic tool.
13B-106
MR-372-J84-13B200$324.mif
V13
DIESEL INJECTION
Fault finding – Interpretation of faults
EDC16
Program No.: C1
Vdiag no.: 18, 1C, 20,
50, 58, 5C
13B
DF097
PRESENT
OR
STOREDCAMSHAFT SENSOR CIRCUIT
1.DEF: No signal
2.DEF: Inconsistent signal
NOTESConditions for applying the fault finding procedure to a stored fault:
The fault is declared present after the engine is started or following a road test.
A drop in engine speed followed by nominal behaviour from the vehicle is possible.
Special notes:
If this fault is present:
– It is impossible to start the vehicle,
– the level 1 warning light is illuminated.
Use bornier Elé.1681 or Elé.1590 for any operation on the injection computer
connectors.
1.DEF
2.DEF
NOTESCheck the conformity of the + 12 V after relay supply line,
from connection 3FB (Mégane II and Laguna II) or 3FB1
(Scénic II) of component 1337 or 597.
Use the vehicle Wiring Diagrams Technical Note.
Check the camshaft sensor connections.
Check the injection computer connections.
Check the camshaft sensor fitting and positioning,
Also check its general condition, (damaged housing, overheating, etc.),
Carry out the necessary repairs.
Check the continuity and absence of interference resistance of the following connections:
– connection codes 3CQ and 3FJ between components 120 and 746.
With the ignition on and the camshaft sensor connected:
Use a voltmeter to measure the voltage between connections 3FJ and 3FB (Mégane II and Laguna II) or 3FB1
(Scénic II) of the camshaft sensor:
The voltage displayed should be equal to the battery voltage ± 0.08 V.
– If the voltage is outside permitted tolerance values, take the measurement again on the connector, with the
camshaft sensor disconnected,
– If the voltage is still outside permitted tolerance values with the sensor disconnected.
Check thecontinuity and the absence of interference resistance on connection 3FB (Mégane II and Laguna
II) or 3FB1 (Scénic II) between components 756 and 1337 or 597.
If the measured voltage is correct with the sensor disconnected.
Measure the resistance of the camshaft sensor between connections 3CQ and 3FB (Mégane II and Laguna II)
or 3FB1 (Scénic II).
Replace the sensor if its resistance is not 9750 Ω < X < 10750 Ω at 20°C
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.
AFTER REPAIRDeal with any faults.
Carry out a road test followed by another check with the diagnostic tool.
EDC16_V50_DF097/EDC16_V58_DF097/EDC16_V5C_DF097/EDC16_V18_DF097/EDC16_V1C_DF097/EDC16_V20_DF097
13B-108
MR-372-J84-13B200$324.mif
V13
DIESEL INJECTION
Fault finding – Interpretation of faults
EDC16
Program No.: C1
Vdiag no.: 18, 1C, 20,
50, 58, 5C
13B
DF167
PRESENT
OR
STOREDTHERMOPLUNGER RELAY CIRCUIT
1.DEF: Below minimum threshold
NOTESDeal with the following faults first:
For MEGANE II ph1 and ph2, SCENIC II ph1 and ph2:
–DF032 Thermoplunger 1 relay control circuit,
–DF033 Thermoplunger 2 relay control circuit,
–DF034 Thermoplunger 3 relay control circuit,
For LAGUNA II ph2:
–DF238 Thermoplunger no. 3 relay circuit,
–DF239 Thermoplunger no. 2 relay circuit,
–DF240 Thermoplunger no. 1 relay circuit.
Conditions for applying the fault finding procedure to a stored fault:
The fault is declared present after:
– with the engine running,
– using SC017 Particle filter regeneration,
– actuation of the thermoplunger using AC063 Thermoplunger relay no.1, AC064
Thermoplunger relay no.2, AC031 Thermoplunger relay no.3,
– the appearance of at least two of faults DF032 Thermoplunger relay control
circuit 1, DF033 Thermoplunger relay control circuit 2, DF034 Thermoplunger
relay control circuit 3.
Use the Wiring Diagrams Technical Notes for MEGANE II ph1 and ph2, SCENIC II
ph1 and ph2 and LAGUNA II ph2.
Visually inspect the connectors, fitting and correct operation of the thermoplunger, component codes: 898, 1072,
1073 and 1074.
If the connectors are faulty and if there is a repair procedure (see Technical Note 6015A, Repairing electrical
wiring, Wiring: Precautions for repair) repair the connector(s); otherwise, replace the wiring.
AFTER REPAIRDeal with any faults.
Carry out a road test followed by another check with the diagnostic tool.
EDC16_V50_DF167/EDC16_V58_DF167/EDC16_V5C_DF167/EDC16_V18_DF167/EDC16_V1C_DF167/EDC16_V20_DF167