2009 RENAULT SCENIC fuel

DIESEL INJECTION
Fault finding – Test13B
13B -269V3 MR-372-J84-13B250$900.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
Part 1. Overpressure valve return flow test:
TEST11 Incorrect operation of the overpressure valve
Is the engine working?
–Fit Mot. 1760 as shown in the tool fitting procedure (see part 2).
–Press the Start button (with card).
–Measure the length travelled by the diesel fuel in the pipes of the Mot. 1760.
–Replace the overpressure valve if the diesel length travelled is greater than 10 cm.
–The overpressure valve fuel return pipe must be fitted to the injector rail.
–Start the engine.
–Set the Clip diagnostic tool to parameter reading mode.
–Raise the temperature of the engine.
–Display parameter PR063 Fuel temperature. Increase the diesel temperature to above 50˚C.
–Switch off the engine.
–Fit Mot. 1760 as shown in the tool fitting procedure (see part 2).
–View parameter PR038 Rail pressure.
–Ask another Cotech to monitor the rise in fuel in the container during engine turnover, as the container will fill up
quickly if the overpressure valve is leaking.
–Start the engine.
–Accelerate the engine until the pressure in the rail is 550 bar:
–if the engine speed is less than 3000 rpm, maintain this pressure,
–if the engine speed is greater than 3000 rpm, reduce the engine speed until the rail pressure is 500 bar
and maintain this pressure.
–Maintain these conditions for 1 min.
–Release the accelerator pedal and maintain the idle speed for 10 seconds.
–Switch off the engine.
–Measure the length of diesel contained in the measuring cylinder.
–Replace the injector rail if the quantity of diesel is greater than 5 ml.
–Remove Mot. 1760 as shown in the tool removal procedure (see part 3).
YESNO
EDC16_V51_TEST11

DIESEL INJECTION
Fault finding – Test13B
13B -270V3 MR-372-J84-13B250$900.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
Part 2: Fitting the tool:
Remove the engine undertray.
Disconnect the overpressure valve fuel return pipe according to the following procedure (do not remove the clips):
–press the clip,
–pull vertically on the end piece (1) of the fuel return pipe.
TEST11
CONTINUED 1
IMPORTANT
The end piece is fragile. Be careful not to break it by pulling it too hard. Replace

DIESEL INJECTION
Fault finding – Test13B
13B -271V3 MR-372-J84-13B250$900.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
Fit blanking plugs (B), from the kit (part number 77 01 208 209), on the end pieces of the fuel return pipe. If Mot.
1760 is not fitted immediately on the overpressure valve, place a blanking plug (A) on the overpressure valve fuel
return opening.
Shown above is the pipe (Mot. 1760) with the end piece (2) on the right and the plug (4) on the left.
Remove the clip and the plug from the end piece (2) of the pipe of Mot. 1760, leave the plug (4) in place.
TEST11
CONTINUED 2

DIESEL INJECTION
Fault finding – Test13B
13B -272V3 MR-372-J84-13B250$900.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
Connect the pipe of Mot. 1760 to the rail overpressure valve (without removing the clip on the overpressure valve):
–press down on the clip (1) of the overpressure valve,
–insert the end piece (2) in the overpressure valve fuel return opening.
–do not forget to fit the end piece plug (2) to the overpressure valve fuel return opening using the clip supplied.
Remove the plug (4).
Insert the end of the pipe in the measuring cylinder of Mot. 1760, the measuring cylinder is taken from Mot. 1711.
Measure the return flow (see the procedure in part 1 of this test).
Part 3: Removing the tool:
Disconnect the pipe of Mot. 1760 on the overpressure valve:
–press down on the clip (1) of the overpressure valve,
–pull horizontally on the end piece (2) of the pipe of Mot. 1760 while putting a cloth on the end piece (2) to avoid the
drips.
Lift the end piece (2) vertically so that the fuel contained in the pipes flows into the measuring cylinder of Mot. 1760.
Remove the plug from the fuel return pipe end piece (2).
Connect the complete fuel return pipe to the overpressure valve.
Wipe up any diesel run-off with a cleaning cloth (part number 77 11 211 707).
TEST11
CONTINUED 3
IMPORTANT
Use a cleaning cloth (part number 77 11 211 707) to absorb fuel run-off.

DIESEL INJECTION
Fault finding – Glossary13B
13B -273V3 MR-372-J84-13B250$945.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51DIESEL INJECTION
Fault finding – Glossary
(R = Resistance, EGR = Exhaust gas recirculation, FAP = Particle filter)Injection computer112-track (BOSCH)
Connectors: black A 32-track, brown B 48-track, grey C 32-track
Atmospheric pressure sensor Integrated into the computer (BOSCH)
Injector0.23 Ω at + 20˚C/2 Ω max (BOSCH)
1600 bar
Flow regulator (high pressure
pump)R = 3 Ω at + 20˚C (BOSCH, CP3.2+ pump type)
Rail pressure sensorPressure limiter on the rail: opening around 1800 bar
(BOSCH, bolted to the rail)
Engine speed sensor R = 680 ± 170 Ω at +20˚C (MGI)
Camshaft sensorHall effect sensor (ELECTRICFIL)
R = 10250 ± 500 Ω at + 20˚C (measurement between tracks 2 and 3 of the
sensor)
Turbocharger control solenoid valve 15.4 ± 0.7 Ω at + 20˚C (PIERBURG)
Electric EGR valveTrack 1: + 12 V electric motor
Track 2: + 5 V potentiometer
Track 3: Not usedTrack 4: potentiometer earth
Track 5: engine earth
Track 6: potentiometer signal
DIRECT CURRENT MOTOR: R between tracks 1 and 5 = between 1 Ω and
400 Ω at + 20˚C
POTENTIOMETER: R between tracks 2 and 4: 6.5 ± 2.4 kΩ at + 20˚C
(SIEMENS)
Electrical damper valve MOTOR (VDO)
Air flowmeterTrack 1: air temperature signal
Track 2: flow sensor earth
Track 3: + 5 V flowmeterTrack 4: + 12 V battery
Track 5: air flow signal
Track 6: battery earth
(SIEMENS)
Air temperature sensor R = 3714 Ω ± 161 at + 10˚C/2448 Ω ± 96 at + 20˚C/1671 Ω ± 59 at + 30˚C
Coolant temperature sensor R = 2252 Ω ± 112 at 25˚C/811 Ω ± 39 at 50˚C/283 Ω ± 8 at 80˚C
Accelerator pedal sensorR gang 1 = 1700 ± 900 Ω;
R gang 2 = 2850 ± 2050 Ω
Heater plugR = 0.6 Ω at + 20˚C/2 Ω max
Maximum current drawn: 28 A at 0 seconds/12 A at 10 seconds/9 A after
30 seconds
Water in diesel fuel sensor According to application (ZERTAN)