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)
