DIESEL INJECTION
Fault finding – Interpretation of faults13B
13B-84V3 MR-372-J84-13B250$360.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
DF054
PRESENT
OR
STORED
TURBOCHARGING SOLENOID VALVE CONTROL CIRCUIT
CC.1 : Short circuit to + 12 V
CC.0 : Short circuit to earth
CO : Open circuit
1.DEF : Internal electronic fault
2.DEF : Inconsistent signal
3.DEF : Below minimum threshold
4.DEF : Above maximum threshold
5.DEF : Permanent high signal
NOTESConditions for applying the fault finding procedure to stored faults:
The fault is declared present after:
–the engine is started,
–a road test,
–actuator command AC004 Turbocharging solenoid valve.
Special notes:
If the fault is present:
–turbocharging is no longer authorised,
–the EGR function is inhibited,
–the vehicle performance is reduced,
–the level 1 warning light is lit,
–If CC.0 is present, the OBD warning light will come on after three consecutive driving
cycles (starting + 5 seconds + switching off the ignition and waiting for 1 minute).
Use bornier Ele. 1681 or Ele. 1590 for any operation on the injection computer
connectors.
CC.1
4.DEF
5.DEF
NOTESNone
Check the turbocharging solenoid valve connections.
Check the injection computer connections.
Repair if necessary.
Measure the resistance of the turbocharging solenoid valve between tracks 1 and 2:
If the resistance displayed is not 15.4 ± 0.7 Ω at 20˚C, replace the turbocharger solenoid valve.
Check the continuity and insulation from the + 12 V feed of the following connection:
Injection computer grey 32-track connector C,
track E1Track 1 turbocharging solenoid valve
Repair if necessary.
If the fault is still present, replace the turbocharging solenoid valve.
AFTER REPAIRDeal with any faults.
Carry out a road test followed by another check with the diagnostic tool.
EDC16_V51_DF054
DIESEL INJECTION
Fault finding – Interpretation of faults13B
13B-85V3 MR-372-J84-13B250$360.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
DF054
CONTINUED 1
CC.0
CO
3.DEF
NOTESNone
Check the turbocharging solenoid valve connections.
Check the injection computer connections.
Repair if necessary.
Measure the resistance of the turbocharging solenoid valve between tracks 1 and 2:
If the resistance displayed is not 15.4 ± 0.7 Ω at 20˚C, replace the turbocharger solenoid valve.
Check the continuity and insulation against earth of the following connections:
Injection computer grey 32-track
connector C, track E1Track 1 turbocharging solenoid valve
UPC PPM1 connector Track 1 Track 2 turbocharger solenoid valve
Repair if necessary.
If the fault is still present, replace the turbocharging solenoid valve.
AFTER REPAIRDeal with any faults.
Carry out a road test followed by another check with the diagnostic tool.
DIESEL INJECTION
Fault finding – Interpretation of faults13B
13B-86V3 MR-372-J84-13B250$360.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
*Opening cyclic ratioDF054
CONTINUED 2
1.DEF
2.DEF
NOTESNone
Check the turbocharging solenoid valve connections.
Check the injection computer connections.
Repair if necessary.
Measure the resistance of the turbocharging solenoid valve between tracks 1 and 2:
If the resistance displayed is not 15.4 ± 0.7 Ω at 20˚C, replace the turbocharger solenoid valve.
Check the continuity and insulation against earth of the following connections:
Injection computer grey 32-track
connector C, track E1Track 1 turbocharging solenoid valve
UPC PPM1 connector Track 1 Track 2 Turbocharger solenoid valve
If the fault is still present, check that the computer output is working correctly.
With the turbocharging solenoid valve connected:
Using a voltmeter:
–Connect the negative terminal of the voltmeter to track 1 of the solenoid valve and the negative terminal to
track 2.
–Clear any solenoid valve faults and run command AC004 Turbocharger solenoid valve.
The voltmeter should display ten cycles of two successive voltages: ~ 2.5 V (opening cyclic ratio* of 20%) then
~ 8.75 V (opening cyclic ratio* of 70%).
Or using an oscilloscope (at 5 V range/division and 1 ms/div time base):
–Connect the negative terminal of the oscilloscope to the battery earth and the positive terminal to track 2 of the
solenoid valve.
–Clear any solenoid valve faults and run command AC004 Turbocharging solenoid valve.
The oscilloscope should display a square wave signal with an amplitude of 12.5V (~ battery voltage) at a frequency
of 140 Hz (with an OCR changing successively from ~ 20 to ~ 70%).
–if the measurement is correct, replace the solenoid valve.
–if the measurement does not show any control or continuous voltage, contact the techline.
AFTER REPAIRDeal with any faults.
Carry out a road test followed by another check with the diagnostic tool.
DIESEL INJECTION
Fault finding – Interpretation of faults13B
13B-87V3 MR-372-J84-13B250$360.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
DF055
PRESENT
OR
STOREDTURBOCHARGING PRESSURE REGULATION CIRCUIT
1.DEF : Pressure too low
2.DEF : Pressure too high
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.
Special notes:
If the fault is present:
–turbocharging is no longer authorised,
–the EGR function is inhibited,
–the level 1 warning light is lit.
Use bornier Ele. 1681 or Ele. 1590 for any operation on the injection computer
connectors.
1.DEF
NOTESNone
Check the turbocharger pressure sensor connections.
Check the connections of the turbocharging pressure relief solenoid valve.
Check the injection computer connections.
Repair if necessary.
Check the sealing of the high pressure air circuit:
–disconnected or pierced pipes,
–pressure sensor disconnected or poorly fitted (seal present),
–intercooler pierced (to check the intercooler: with the vehicle stationary, stabilise the engine speed between
3,500 and 4,000 rpm and check that there are no leaks).
Check the conformity of the turbocharger pressure signal and apply test 9 Air line at the turbocharger, then test
5 Turbocharger control solenoid valve check and test 6 Turbocharger.
AFTER REPAIRDeal with any faults.
Carry out a road test followed by another check with the diagnostic tool.
EDC16_V51_DF055
DIESEL INJECTION
Fault finding – Interpretation of faults13B
13B-88V3 MR-372-J84-13B250$360.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
DF055
CONTINUED 1
Check that the turbocharger and the control circuit are working:
–With the engine stopped, make sure that the control rod is in the resting position.
–Start the engine and make sure that the control rod actuates to the upper stop.
(when the engine stops, the control rod should return to the rest position).
If the control rod does not move correctly, carry out the following checks:
1Check the control vacuum pressure:
–disconnect the solenoid valve inlet hose and connect it to a pressure gauge,
–start the engine and stabilise it at idle speed,
–If the vacuum does not reach 800 mbar ± 100: check the vacuum pressure circuit from the vacuum pump,
–stop the engine, reconnect the inlet hose and proceed to step 2.
2Solenoid valve control check:
–Disconnect the solenoid valve outlet hose,
–start the engine and stabilise it at idle speed,
–place your hand on the solenoid valve and block the outlet connection with your thumb,
–if there is no detectable vibration of the solenoid valve, check that the computer output is operating correctly (see
DF054 Turbocharging solenoid valve control circuit 1.DEF).
3Solenoid valve operation check:
–Attach the pressure gauge to the solenoid valve outlet union,
–start the engine and stabilise it at idle speed,
–if the vacuum pressure does not reach 800 mbar ± 100, replace the solenoid valve.
AFTER REPAIRDeal with any faults.
Carry out a road test followed by another check with the diagnostic tool.
DIESEL INJECTION
Fault finding – Interpretation of faults13B
13B-89V3 MR-372-J84-13B250$360.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
DF055
CONTINUED 2
2.DEF
NOTESPriority when dealing with a number of faults:
Deal with fault DF004 Turbocharger pressure sensor
circuit first if it is present or stored.
Check the turbocharging pressure sensor connections,
Check the connections of the turbocharging solenoid valve,
Check the injection computer connections.
Repair if necessary.
Check the conformity of the turbocharging pressure signal (refer to the interpretation of parameter PR041
Turbocharging pressure).
Make sure the turbocharging pressure relief solenoid valve is not jammed open:
–With the engine switched off, disconnect the inlet and outlet hoses from the solenoid valve.
–connect a vacuum pump to the inlet union and apply a vacuum pressure.
–if the vacuum pressure is not maintained: replace the solenoid valve.
Check that the turbocharger control rod has not seized:
–with the engine stopped, make sure the turbocharger control rod is in the rest position.
–apply a vacuum pressure of 800 mbar ± 100, to the hose connected to the turbocharger control diaphragm,
–if the diaphragm is affected by the vacuum, check the movement and setting of the turbocharger control rod (see
MR 364 (MEGANE II) and 370 (SCENIC II), Mechanical, 12B, Turbocharging).
If the control rod is seized, replace the turbocharger.
If the fault is still present, apply test 9 Air line at the turbocharger, then test 5 Turbocharger control solenoid
valve check and test 6 Turbocharger.
AFTER REPAIRDeal with any faults.
Carry out a road test followed by another check with the diagnostic tool.
DIESEL INJECTION
Fault finding – Interpretation of faults13B
13B -122V3 MR-372-J84-13B250$450.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
DF619
PRESENT
OR
STOREDEGR VALVE JAMMED OPEN
NOTESConditions for applying the fault finding procedure to a stored fault:
The fault is declared present after a road test.
Priorities when dealing with a number of faults:
–DF118 EGR solenoid valve servo-control,
–DF209 EGR valve position sensor circuit,
–DF272 EGR valve control circuit,
if they are present or stored.
Special note:
If the fault is present:
–The EGR and turbocharging functions are inhibited.
–The level 1 warning light is lit.
Use bornier Ele. 1681 or Ele. 1590 for any operation on the injection computer
connectors.
IMPORTANT
If the EGR valve needs to be replaced to resolve the fault, use command SC036
Reinitialise programming and select EGR valve to reinitialise the EGR valve offsets
(see Replacement of components).
Check the EGR valve connections.
Check the injection computer connections.
Repair if necessary.
AFTER REPAIRDeal with any faults.
Carry out a road test followed by another check with the diagnostic tool.
EDC16_V51_DF619
DIESEL INJECTION
Fault finding – Interpretation of faults13B
13B -124V3 MR-372-J84-13B250$450.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
DF620
PRESENT
OR
STOREDEGR VALVE FOULED
NOTESConditions for applying the fault finding procedure to a stored fault:
The fault is declared present after a road test.
Priorities when dealing with a number of faults:
–DF118 EGR solenoid valve servo-control,
–DF209 EGR valve position sensor circuit,
–DF272 EGR valve control circuit,
if they are present or stored.
Special note:
If the fault is present:
–the EGR function is inhibited,
–turbocharging is inhibited,
–the level 1 warning light is lit.
Use bornier Ele. 1681 or Ele. 1590 for any operation on the injection computer
connectors.
IMPORTANT
If the EGR valve needs to be replaced to resolve the fault, use command SC036
Reinitialise programming and select EGR valve to reinitialise the EGR valve offsets
(see Replacement of components).
Check the EGR valve connections.
Check the injection computer connections.
Repair if necessary.
AFTER REPAIRDeal with any faults.
Carry out a road test followed by another check with the diagnostic tool.
EDC16_V51_DF620