Application
Engines
- TU
- XU10
- EW
Injection system: MAGNETI MARELLI MMDCM 4.8P
Flow chart
"A" assembly: XU10 engine
"B" assembly: TU engine
"C" assembly: EW engine
(1) ignition coil
(2) camshaft position sensor (1115)
(3) (1320) injection ECU
(4) engine speed sensor (1313)
(5) ignition coil unit (1135)
(6) ignition coil unit with phase detector (1191)
Ignition coils
Application: XU10 engine
Special features: one ignition coil per cylinder, directly over the spark plug
Compact coil housing (1135)
Application: EW engine
The coils are attached to a compact box located and fastened on the cylinder head
"double computer-coil" ignition: 2 sparks occur, one at the end of the compression stroke, the other during the exhaust phase (wasted spark)
Ignition coil unit with phase detector (1135)
Application: TU engine
The coils are attached to a compact box located and fastened on the cylinder head
A system incorporated in the compact coil unit permits the injection ECU to detect the position of piston No. 1
NoteThis system replaces the camshaft position sensor
Sparking plugs
Special features
- Flat seat ignition plugs
- Tightening torque: 2,5 daNm
Injection ECU (1320)
The coil command and power stages are incorporated into the ECU (there is no external ignition module)
Static ignition
Application: XU10 and EW engines
The injection ECU supplies each coil firing order: 1-3-4-2
The synchronisation of ignition is achieved by the sensor of the N°1 reference cylinder
"double computer-coil" ignition
Application: TU engine
The ECU supplies each of the 2 coil primaries
The synchronisation of ignition is achieved by the phase detector incorporated in the compact coil unit
On board diagnostic system (EOBD)
NoteEOBD: European On Board Diagnosis, diagnosis of anti-pollution equipment
See chapter: function - diagnosis of depollution systems (EOBD)