Automotive Training Courses

TRAINEE manual

MA EDC7/C32 Common Rail Engine

N
Management

www.texaedu.com
INDEX
1. EDC 7 SYSTEM APPLIED TO MAN GROUP 26
3 1.4.4 2-stage DBV overpressure valve26
1.1 Euro 3 hydraulic circuit 1.4.5 Pressure relief valve26
5 1.5 Euro 4 EDC7 C32 control unit27
1.1.1 KSC (Kraftstoff Service Center) 1.6 Components version Euro 429
5 1.6.1 ECU29
1.1.2 Fuel pump 1.6.2 Intake air temperature/pressure sensor31
6
1.6.3 2-stage turbocharging31
1.1.3 Rail
1.6.4 Engine rpm sensor33
7
1.6.5 Camshaft sensor33
1.1.4 2-stages DBV overpressure valve
1.6.6 Fuel pressure sensor33
7
1.6.7 Rail pressure sensor33
1.1.5 Pressure relief valve
7 1.6.8 Engine oil pressure sensor34
1.2. EDC7 Euro 3 control unit 8 1.6.9 ZME Regulator (M-Prop)34
1.3 Euro 3 version components 1.6.10 Electro-injectors34
9 1.6.11 Engine temperature sensor35
1.3.1 ECU 1.6.12 Intake air temperature sensor35
9 1.6.13 Exhaust gas recirculation36
1.3.2. Intake air pressure sensor 10 1.6.14 CRT back pressure throttle valve37
1.3.3 Engine rpm sensor 1.6.15 PM-Kat37
11 1.6.16 Exhaust gas temperature sensor38
1.3.4 Camshaft sensor 1.6.17 Pressure sensor related to exhaust gases38
12 1.6.18 CRTec38
1.3.5 Fuel pressure sensor 1.6.19 Differential pressure sensor39
13 1.6.20 IMR Relay39
1.3.6 Rail pressure sensor
13
1.3.7 Engine oil pressure sensor
14
1.3.8 ZME Regulator (M-Prop)
15
1.3.9 Electro-injectors
15
1.3.10 Engine temperature sensor
16
1.3.11 Intake air temperature sensor
17
1.3.12 Exhaust gas recirculation
18
1.3.13 IMR Relay
20
1.3.14 FFR ECU
20
1.3.15 Accelerator pedal sensor
21
1.3.16 Tempomat/Gearshift multifunction lever
21
1.3.17 FGR/FGB change over switch
22
1.3.18 Continuous brake lever
22
1.3.19 Engine Brake Management
22
1.3.20 Glow Plug
24
1.4 Euro 4 hydraulic circuit
25
1.4.1 KSC (Kraftstoff Service Center)
25
1.4.2 Fuel pump
26
1.4.3 Rail

TEXA S.p.A. - Copyright © All rights reserved. Images and texts are property of TEXA S.p.A. Unauthorized disclosure and reproduction, even partial, are <1
prohibited – 2013 – V00
 1.6.21 FFR ECU
39
1.6.22 Accelerator pedal sensor
39
1.6.23 Tempomat/Gearshift multifunction lever
39
1.6.24 FGR/FGB change over switch Legend:
39
1.6.25 Continuous brake lever
39
1.6.26 Engine Brake Management Warning
39
1.6.27 Glow plug Information/Notes
39
1.7 Euro 5 hydraulic circuit
40
1.7.1 Fuel pump
40
1.8 Euro 5 control unit EDC7 C32
40
1.9 Euro 5 version components
40
1.9.1 ECU
40
1.9.2 Intake air temperature sensor
42
1.9.3 2-stage turbocharging
42
1.9.4 Intake air cooling circuit
43
1.9.5 Electro-injectors
44
1.9.6 Exhaust gas temperature sensor
44
1.9.7 Compressor disengagement solenoid valve
44
1.9.8 Lambda Probe
44
1.10 EDC 7 system test
45
1.10.1 Cylinder shut-off test
45
1.10.2 Compression test
46
1.10.3 Cylinder Balance test
46
1.11 Hydraulic circuit analysis
46
1.11.1 Low pressure circuit test
46
1.11.2 High pressure circuit test
48

TEXA S.p.A. - Copyright © All rights reserved. Images and texts are property of TEXA S.p.A. Unauthorized disclosure and reproduction, even partial, are <1
prohibited – 2013 – V00
1. EDC 7 SYSTEM APPLIED TO MAN GROUP
The EDC7 system combined with a Common Rail of second generation is today applied to the whole range of
MAN road vehi- cles.

Engine
Engine Displacement Regulations Post- Overboost High pressure
Adjustment
treatment pump
D0834 4,58 I
Euro 3 with/without 1 stage EDC+FFR CP3.3, CP3.4
D0836 6,87 I AGR
D0834 4,58 I Euro 4 Step 1+
AGR + PM-Kat 2 stages EDC+ FFR CP3.3
D0836 6,87 I NOx check
D0834 4,58 I
Euro 5 Step 2 AGR + PM-Kat 2 stages EDC+FFR CP3.3, CP3.3NH
D0836 6,87 I
D0834 4,58 I AGR + PM-Kat 2 stages with
Euro 5 EEV Step EDC+FFR CP3.3, CP3.3NH
D0836 6,87 I or SCR inter- mediate
2
cooling
2 Stages with
D0836 LOH 6,87 I Euro 5 EEV Step AGR EDC+FFR CP3.3
inter- mediate
2
cooling
D2066 LOH-LUH 10.52 I Euro 3 PM-Kat 1 Stage EDC+FFR CP3.4 +
AGR+ PM-Kat
D2066LOH-LUH 10.52 I Euro 4 1 Stage EDC+FFR CP3.4+
or CRT
AGR+ PM-Kat 2 Stages with
D2066 LOH-LUH 10.52 I Euro 5 EDC+FFR CP3.4 +
or CRT inter- mediate
cooling
AGR+PM-Kat 2 Stages with
D2066 LOH-LUH 10.52 I Euro 5 EEV EDC+FFR CP3.4 +
or CRT inter- mediate
cooling
D2066 10.52 I Euro 3 AGR 1 stage EDC+FFR CP3.4, CP3.4+
Euro 4 Step
D2066 10.52 I AGR+PM-Kat 1 stage EDC+FFR CP3.4+
1+ NOx
check
Euro 5, Euro 5
D2066 10.52 I SCR 1 stage EDC+FFR CP3.4+
EEV
Step 2
AGR+PM-Kat
D2676 LOH 12.42 I Euro 3 1 Stage EDC+FFR CP3.4+
or CRT
AGR+PM-Kat
D2676 LOH 12.42 I Euro 4 1 Stage EDC+FFR CP3.4+
or CRT
AGR+PM-Kat 2 Stages with
D2676 LOH 12.42 I Euro 5 EDC+FFR CP3.4+
or CRT inter- mediate
cooling
AGR + PM-Kat 2 Stages with
D2676 LOH 12.42 I Euro 5 EEV EDC+FFR CP3.4+
or CRT inter- mediate
cooling
Euro 4 Step
D2676 12.42 I AGR+PM-Kat 1 Stage EDC+FFR CP3.4+
1+ NOx
check
Euro 5, Euro 5
D2676 12.42 I SCR 1 Stage EDC+FFR CP3.4+
EEV
Step 2
Euro 5, Euro 5
D2868 16.2 I SCR 1 Stage EDC+FFR
EEV
Step 2
D2876 12.80 I Euro 3 AGR EDC+FFR CP3.4
18.27 I
D284x Euro 3 AGR EDC+FFR CP2/4
21.93 I
Table 1: Overview of MAN solutions

D08 engines (150 – 340 HP) for industrial vehicles and D08, D20 and D26 engines (250 – 505 HP)

TEXA S.p.A. - Copyright © All rights reserved. Images and texts are property of TEXA S.p.A. Unauthorized disclosure and reproduction, even partial, <
for passengers transport vehicles adopt the Pure Diesel Technology consisting of an EGR with 2-stages
overboost and intermediate cooling. On buses it is possible to have the CRT (Continuously regenerating trap)
upon request, instead of the PM-Kat.

TEXA S.p.A. - Copyright © All rights reserved. Images and texts are property of TEXA S.p.A. Unauthorized disclosure and reproduction, even partial, <
S2T “MAN EDC7/C32 Common Rail Engine Management” - Automotive Training Courses

MAN engine code identifies a series of machine 6 Train engine

characteristical data. 7 Short engine
9,10 01 Variant
Table 2: Engine code definition. Example of D2066
Positio Digi Meani LF01
n t ng
D Diesel
E
Methane
1 D
G LPG
H Hydrogen
M
Methanol
O
Gasoline
2 and 3 20 Cylinder bore = (xx + 100) mm
Piston stroke = (10x+ 100) mm (3=125
4 6 mm, 4=142 mm, 6=155, 7=166 mm)
5 6 Cylinder number (0 = 10, 2 = 12)
D: 3-way catalytic converter
L: with turbocharger and
6 L
Intercooler T: by payment
No character: Suctioned
H vertical engine for LHD
trucks HR vertical engine for
RHD trucks
HA vertical engine for LHD on-off-road trucks
HG vertical engine with special feature for
LHD on- off-road trucks
F front vertical engine for trucks
GF front vertical engine for trucks (special
feature only for D08)
GFA special feature on-off-road GF
FR front vertical engine for RHD trucks
FA front vertical engine for LHD GF on-off-
road trucks
7 F
FG vertical engine with special feature for
LHD on- off road truck
FGR vertical engine with special feature
for RHD on-off-road trucks
FO front vertical engine for buses
OF front vertical engine for LHD
buses OFR front vertical engine for
RHD buses OH rear vertical engine
for buses
H horizontal engine for trucks
UH rear horizontal engine for
buses UM central horizontal
engine for buses E vertical
engine for other vehicles
UE horizontal engine for other vehicles
..L added engine indication only for L2000
Usage mode if installed on other
vehicles: 1 engine for processing
machines
2 engine unit
8
3 Engine for cogeneration, auxiliary marine
engine 4 Marine engine
5 Engine for farming
4 TEXA S.p.A. - Copyright © All rights reserved. Images and texts are property of TEXA S.p.A. Unauthorized disclosure and reproduction, even partial,
 Common Rail engines can work with
fuels com- plying with regulation EN590.
Operation with fuels as FAME needs to be
specifically defined.

4 TEXA S.p.A. - Copyright © All rights reserved. Images and texts are property of TEXA S.p.A. Unauthorized disclosure and reproduction, even partial,
1.1 Euro 3 hydraulic circuit

1.1.1 KSC (Kraftstoff Service Center)

On MAN vehicles the KSC is fitted, which represents the fuel management unit. It integrates:
• pre-filter with priming pump;
• main filter;
• water separator;
• fuel pressure sensor;
• heater.

Figure 1

TEXA S.p.A. - Copyright © All rights reserved. Images and texts are property of TEXA S.p.A. Unauthorized disclosure and reproduction, even partial, <
S2T “MAN EDC7/C32 Common Rail Engine Management” - Automotive Training Courses

In the lower side we can find the connection of the This valve has 2 calibrated holes:
control solenoid valve of the glow plug, located on • 1 keeps (approx.) 5 bar on the delivery
the intake mani- fold for cold start. towards the high pressure pump;
• 1 keeps 1.3 – 1.8 bar on the filter return and
at the same time supplies the glow plug.

Figure 4: KUV valve of D28 engines

1.1.2 Fuel pump

Figure 2: MAN
The fuel pump assembly consists of the transfer
Legend: KSC pump and the high pressure pump. The pump
A)Main filter shaft is connected to the engine timing through a
B)Fuel pressure sensor
C)Heater
gear wheel. The work pressure varies up to 1400
D) Pre-filter with priming – 1600 bar. Euro 3 MAN vehicles are equipped
pump with a pump CP3.4 o CP3.4+ (CP2/4 on V10 en-
gines). The pump is located:
• on the rear left side where the inline pump
(D28) was fitted;
Legend:
• on the left front side (D08, D20, D26);
A)From the tank • on the rear side in the center of the V (V10).
B) Towards the
mecha- nical
transfer pump
C)From the
mechanical
transfer pump
D) Towards the
high pressure
pump
E)Return to the tank

Figure 3: KSC hydraulic connections

D28 series engines are equipped with the KSC return manifold.
already in- stalled on versions with EDC MS6.1 Legend:
while for D20 and D08 engines a new KSC is fitted. A)Return to the tank
B)From the main filter
On the KSC lower side of D28 a fitting connects the C)To the high pressure
glow plug with a pressure relief valve towards the circuit

6 TEXA S.p.A. - Copyright © All rights reserved. Images and texts are property of TEXA S.p.A. Unauthorized disclosure and reproduction, even partial,
D) From the pre-filter
Figure 5: Pump CP3.4
E)To the main filter

6 TEXA S.p.A. - Copyright © All rights reserved. Images and texts are property of TEXA S.p.A. Unauthorized disclosure and reproduction, even partial,
 Figure 6: Pump Figure 7: DBV valve in D20 engines
Legend: CP3.4+
A)From the tank
B)To the transfer pump In case of overpressures on the Rail, if the valve
C)From the main filter doesn’t open, the ECU controls the M-Prop in
D) To the high
order to increase pressure to speed up the
pressure circuit
E)Return circuit overpressure valve opening. If it doesn’t open
anyway, the engine shuts down.
The engine shaft-pump transmission ratio is 1:1.67
for D20 and D28, 1:1.33 for D08 and 2:1 for V10. 1.1.5 Pressure relief valve
The lubricating oil returning from the pump is sent
to the pre-filter suction of the oil module. The fuel returning from the injectors is conveyed
towards the tank through the pressure relief valve
1.1.3 Rail that allows to keep the pressure on the return
circuit at a value of 1.2 - 1.4 bar. In D08 and D20
The Rail, manufactured in forged steel, has different engines, a single return manifold is obtained in
diame- ters and lenghts according to the kind of the head and the valve is screwed on the head
engine it is used on. It presents a calibrated itself. In D28 engines, the injector returns are taken
volume in order to guarantee: outside each cylinder head and are conveyed
• a quick pressure increase at start up; towards a valve which operates as return manifold
• the pressure compensation due to the pulses and keeps the pressure on the circuit at 1.2 – 1.4
genera- ted by pump and injections. bar (the first version is set at 0.5 bar).

The Rail has also a casing for:

• pressure sensor;
• overpressure valve.

1.1.4 2-stages DBV overpressure

valve

The overpressure valve used in MAN engines is a

double stage valve. The pressure settings are
1800 and 700-800 bar. Once the second stage is
opened, the valve remains open until the
pressure falls under 50 bar.

Figure 8: Return manifold in D28 engines

Legend:

TEXA S.p.A. - Copyright © All rights reserved. Images and texts are property of TEXA S.p.A. Unauthorized disclosure and reproduction, even partial, <
 A)Return from the injectors C) Return from DBV valve
B)Return to the tank D) Return from the glow plug

TEXA S.p.A. - Copyright © All rights reserved. Images and texts are property of TEXA S.p.A. Unauthorized disclosure and reproduction, even partial, <
S2T “MAN EDC7/C32 Common Rail Engine Management” - Automotive Training Courses

pre-injection is available for all engine speeds;

• it checks the pressure on the Rail
through the feedback signal of the
pressure sensor;
• it manages, using the proper mappings, the
precise injection point;
• it stabilizes the idle speed correcting the flows
on the injectors and the pressure on the
Rail;
• it limits the engine speed;
• it controls the Cut-off phase, cancelling the
control on the injectors and acting on the
flow regulator;
Figure 9: Pressure relief valve in D08 and D20
• it controls the exhaust smoke during
engines acceleration by activating the injectors and
the flow regulator accor- ding to the actual
istantaneous engine load;
1.2. EDC7 Euro 3 control unit • activation of the Limp-Home mode when
the fuel pressure reaches abnormal values;
The Euro 3 version of EDC7 has the following • activation of performance limitations
features: according to occurring failures;
• pre-heating control at low temperatures; • after Run: at engine shutdown the ECU
• rpm/timing synchronization at start up for remains po- wered in order to terminate all
injection sequential control; existing processes and to store operating
• it manages the injection process by checking parameters.
the flow regulator, the pre-injection and the
main injection. The
The control unit can manage max. 6 cylinders,
there- fore V10 engines use 2 control units
(Master/Slave).

Legend: 19) Starter motor IMR relay

1)Engine rpm sensor 20) Engine Brake Solenoid Valve
2)Camshaft sensor
3)Air pressure sensor
4)Engine temperature sensor
5)Air intake temperature
sensor
6)Rail pressure sensor
7)Fuel pressure sensor
8)Oil pressure sensor
9)EGR position sensor
10) Intarder/Engine Brake
Lever
11) Cruise Control
Management
12) Accelerator pedal
sensor
13) Clutch travel sensor
14) FGR/FGB switch
15) M-Prop flow regulator
16) Electro-injectors
17) Turbocharger
proportional solenoid
valve
18) EGR solenoid valve

8 TEXA S.p.A. - Copyright © All rights reserved. Images and texts are property of TEXA S.p.A. Unauthorized disclosure and reproduction, even partial,
 Figure 10: EDC7 Euro3 input/output
signals

8 TEXA S.p.A. - Copyright © All rights reserved. Images and texts are property of TEXA S.p.A. Unauthorized disclosure and reproduction, even partial,
1.3 Euro 3 version components 22 AGR position sensor Signal
23 AGR position sensor Power supply 5V
24 Engine oil pressure sensor Power supply 5V
1.3.1 ECU 25 Intake air pressure sensor Power supply 5V
26 -- --
27 -- --
The EDC 7 ECU is directly fitted on the engine, left 28 -- --
side (in V10 engines the 2 ECUs are fitted on the 29 -- --
frame behind the cabin in 2 protective boxes). 30 -- --
31 -- --
The ECU has 3 connectors. 32 -- --
33 -- --
34 -- --
35 -- --
36 -- --
37 Fuel pressure sensor Ground
38 Engine oil pressure sensor Ground
39 -- --
40 Fuel pressure sensor Power supply 5V
41 -- --
42 -- --
43 Rail pressure sensor Power supply 5V
44 -- --
45 -- --
46 -- --
47 -- --
48 -- --
49 -- --
50 -- --
51 -- --
52 -- --
53 -- --
54 Camshaft sensor Ground
55 Engine rpm sensor Ground
56 -- --
Figure 11: EDC7 ECU connector 57 Intake air temperature Ground
sensor
58 Engine temperature sensor Ground
59 -- --
Pin Component 60 -- --
1 Power supply +30 61 Rail pressure sensor Ground
2 Turbocharger solenoid Positive control 62 Intake air pressure sensor Ground
valve 63 -- --
3 Ground 64 -- --
4 Turbocharger solenoid Ground 65 -- --
valve 66 -- --
5 -- -- 67 -- --
6 -- -- 68 -- --
7 Power supply +30 69 -- --
8 M-Prop regulator PWM control 70 -- --
9 Ground 71 -- --
10 M-Prop regulator Ground 72 Camshaft sensor Signal
11 AGR solenoid valve Negative control 73 Engine rpm sensor Signal
12 Power supply +30 74 -- --
13 Power supply +30 75 -- --
14 Ground 76 Intake air temperature Signal
15 Ground sensor
16 IMR relay Positive control 77 Engine temperature sensor Signal
17 AGR solenoid valve Positive control 78 -- --
18 -- -- 79 -- --
19 IMR relay Ground 80 Rail pressure sensor Power supply 5 V
20 Fuel pressure sensor Signal 81 Intake air pressure sensor Signal
21 Engine oil pressure sensor Signal

TEXA S.p.A. - Copyright © All rights reserved. Images and texts are property of TEXA S.p.A. Unauthorized disclosure and reproduction, even partial, <
S2T “MAN EDC7/C32 Common Rail Engine Management” - Automotive Training Courses

82 -- -- 1.3.2. Intake air pressure sensor

83 -- --
84 -- --
85 -- -- The intake air pressure sensor is used to determine
86 -- -- the ac- tual quantity of air entering the cylinders
87 -- -- and therefore al- lows to dose with a higher
88 -- --
89 -- -- precision the fuel flow to reduce emissions and
Table 3: ECU EDC7 consumptions.
connector A The sensor is located on the intake manifold, left
front side. The piezoelectrical sensor and an
Pin Compone Pi Component
nt n
electronic system for si- gnal amplification and
1 -- -- 19 -- -- temperature compensation are inte- grated on a
2 -- -- 20 -- -- silicon chip.
3 -- -- 21 CAN line CAN L The chip active surface is exposed to a vacuum
4 -- -- 22 CAN line CAN H
reference value. The vacuum pipe pressure is
5 -- -- 23 -- --
6 -- -- 24 -- --
transmitted through an appropriate fitting on the
7 -- -- 25 -- -- rear side of the membrane that resists the
8 -- -- 26 -- -- measuring aid.
9 -- -- 27 -- --
10 -- -- 28 -- --
11 -- -- 29 -- --
12 -- -- 30 -- --
13 -- -- 31 -- --
14 -- -- 32 -- --
15 -- -- 33 -- --
16 -- -- 34 -- --
17 -- -- 35 Diagnostic K line
socket
18 -- -- 36 Power supply + 15
Table 4: ECU EDC7
connector B
Figure 12: Kavlico intake air pressure sensor
(D28)
Pin Component
1 Cylinder 5 injector Positive control
2 Cylinder 6 injector Positive control
3 Cylinder 4 injector Positive control
4 Cylinder 1 injector Positive control
5 Cylinder 3 injector Positive control
6 Cylinder 2 injector Ground
7 -- --
8 -- -- Figure 13: Connections of Kavlico intake air pressure
sensor (D28)
9 -- --
10 -- --
11 Cylinder 2 injector Positive control In D20 engines the intake air pressure sensor is a
12 Cylinder 3 injector Ground Bosch sensor with the same features of the
13 Cylinder 1 injector Ground
previous sensor.
14 Cylinder 4 injector Ground
15 Cylinder 6 injector Ground
16 Cylinder 5 injector Ground
Table 5: ECU EDC7
connector C

Figure 14: Connections of Bosch intake air pressure

sensor (D20)

10 TEXA S.p.A. - Copyright © All rights reserved. Images and texts are property of TEXA S.p.A. Unauthorized disclosure and reproduction, even partial,
10 TEXA S.p.A. - Copyright © All rights reserved. Images and texts are property of TEXA S.p.A. Unauthorized disclosure and reproduction, even partial,
 Measurement point Description Valu
e
Pins 3 and 2 (Kavlico) Power supply 5V
Pins 3 and 1 (Bosch) Power supply 5V
Pins 4 and 2 (Kavlico) Signal See diagram
Pins 4 and 1 (Bosch) Signal See diagram
Table 6: Sensor electric controls

Figure 17: Engine rpm sensor

The engine can also be started only with

this sen- sor signal. Near TDC the ECU performs
some injections to identify the correct ignition
order.
Figure 15: Sensor Pressure/Voltage Diagram

In case of sensor failure a replacement value

is pre- set; this way, there is no operation limitation.
The signal is verified through an atmospheric pressure
sensor integrated
in the ECU, which evaluates the signal when the
engine is working at idle speed. Figure 18: Electrical connections of the engine rpm sensor

1.3.3 Engine rpm sensor Measurement Description Valu

point e
Pins 1 and 2 Resistance 750 – 1100 ohm
The engine rpm sensor is an inductive sensor and it Pins 1 and 2 Signal SEE
is posi- tioned on the rear side of the engine on the OSCILLOGRAM
flywheel box. It detects the engine rpm through the Table 7: Reference values of the engine rpm sensor

gear on the flywheel that has 60-2 = 58 holes.

There is therefore 1 hole every 6° and 2 holes are
missing in line with the first cylinder.
The distance between sensor and gear is 1 mm (not
adju- stable value).

Figure 19: Signal of engine rpm at idle

The first half wave at start up must be

Figure 16: Rpm sensor mounting position
positive. If not, error code 3753 is generated.

TEXA S.p.A. - Copyright © All rights reserved. Images and texts are property of TEXA S.p.A. Unauthorized disclosure and reproduction, even partial, <
S2T “MAN EDC7/C32 Common Rail Engine Management” - Automotive Training Courses

1.3.4 Camshaft sensor

The camshaft sensor is an inductive sensor. It

detects the camshaft rpm through some notches on
the camshaft gear. The sensor position differs
according to the engine.
In D28 engines where the valves rocker arms operate
throu- gh rods, the camshaft is on the case.
The sensor here is visible on the engine rear left
side, over the high pressure pump.
The reading occurs through 7 pins fixed on the
timing gear. The sensor in this case is equipped
with a connection cable. In D20 and D26 engines, Figure 21: Camshaft sensor
with overhead camshaft, the sen- sor is at the rear
left hand on the top, under the valve cover. In D08 Figure 22: Electrical connections of the camshaft sensor
engines, where the valves rocker arm
operates through rods, the camshaft is on the M ea s u r
Description Value
case. emen t
point
The sensor here is visible on the engine front right
Pins 1 and 2 Resistance 750 – 1100 ohm
side, on the camshaft bracket behind the drive
belt. Pins 1 and 2 Signal SEE
OSCILLOGRAM
The reading occurs through 5 or 7 protrusions on Table 8: Reference values of the camshaft sensor
the timing gear.
In D08, D20 and D26 engines the sensor directly
integrates also the connection pin.
In V10 engines the sensor is inside the CP2/4
pump.

Figure 23: Camshaft rpm signal

The engine can be started also with only this

sensor
signal.
In the ECU all skew corrections are stored so that the
injec- tion point can be calculated without knowing
the engine shaft rotation angle.

The first half wave at start up must be

Figure 20: Camshaft rpm sensor mounting
positive. If not, error code 3753 is generated.
position

12 TEXA S.p.A. - Copyright © All rights reserved. Images and texts are property of TEXA S.p.A. Unauthorized disclosure and reproduction, even partial,
12 TEXA S.p.A. - Copyright © All rights reserved. Images and texts are property of TEXA S.p.A. Unauthorized disclosure and reproduction, even partial,