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ECU controls what exactly?
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V9977

Posted: Mon Nov 08, 2010 2:41 pm

Joined: Feb 07, 2010
Posts: 2949
Trade Rating: +6
Location: Athens, Greece

Don't say the engine, we all knew that.
As far as I know the following on a 1.4i 206:

Input from sensors:

Throttle position
MAP
Engine temperature
Air intake temperature
Crank shaft position
O2 sensor (regulating)
O2 sensor (diagnostic)
Power steering circuit pressure

Output to actuators:

Ignition spark timing
Idle control stepper motor
Fans
Fuel pump

Is that all?
How is the rich/lean mix adjusted and consequent 'overfueling' possible?
Any further info much appreciated.


	1.4i, 2001, 3-door, China Blue Repair safely - Drive safely

ExoVyper

Posted: Mon Nov 08, 2010 2:51 pm

Joined: Feb 07, 2010
Posts: 1495
Trade Rating: +3
Location: Waiting for the tugboats to push me into port (Whitehaven)

overfuelling is the ecu getting a wrong reading from a sensor


	Current car:HMS Vectra

V9977

Posted: Mon Nov 08, 2010 2:56 pm

Joined: Feb 07, 2010
Posts: 2949
Trade Rating: +6
Location: Athens, Greece

ExoVyper wrote:

overfuelling is the ecu getting a wrong reading from a sensor

Yes but what does it control to affect fuelling in the engine?


	1.4i, 2001, 3-door, China Blue Repair safely - Drive safely

ExoVyper

Posted: Mon Nov 08, 2010 2:57 pm

Joined: Feb 07, 2010
Posts: 1495
Trade Rating: +3
Location: Waiting for the tugboats to push me into port (Whitehaven)

erm i think the issues can sometimes be a dodgy lamba sensor is it? in the exhaust that feeds the ecu wrong information


	Current car:HMS Vectra

Spanerman

Posted: Mon Nov 08, 2010 2:59 pm

Joined: Oct 03, 2010
Posts: 417
Trade Rating: +1
Location: Neath, South Wales.

V9977 wrote:

ExoVyper wrote:

overfuelling is the ecu getting a wrong reading from a sensor

Yes but what does it control to affect fuelling in the engine?

The injector timing Cool


	Hello

Lee

Posted: Mon Nov 08, 2010 3:01 pm

Joined: Feb 07, 2010
Posts: 13077
Trade Rating: +65
Location: England

It controls.....
Fuel pump relay
Canister purge valve
Injectors (1, 2, 3, 4)
Coilpack
A/C
Cooling Fan
Interacts with Instrument Cluster
Diag Connector
ABS
Alternator Signal
Speed sensor
knock sensor
crankshaft position sensor
map sensor
thermo timer switch
coolant temp
stepper motor
Throttle valve potentiometer
lambda sensors
fuel pump

based on the sagem s2000 ecu

EDIT:
Function
The control unit is the electronic processing unit for the motormanagement system. The control unit has to ensure that the engine receives the right amount of fuel, the right ignition timing and a proper idle control in every operating state. The control unit uses sensors to determine engine operating conditions. Depending on the engine conditions, the control unit activates actuators.

Quickcheck
Check connector(s): Inspect the connector(s) and if necessary clean or fix them to make sure the connection is good. When you suspect the control unit is faulty make sure all sensors, actuators and the communication with other control units function properly. Furthermore check the supply voltage and ground connections of the control unit: Turn ignition off. Remove ECU connector. Locate the supply voltage connections. Turn ignition on, measure voltage between corresponding connector terminal(s) and the negative terminal of the battery, these should equal battery voltage. If not check wiring and fuse. Turn ignition off. Locate the ground connections. Measure resistance between corresponding connector terminal(s) and the negative terminal of the battery, these should be < 1 ohm.

V9977

Posted: Mon Nov 08, 2010 3:21 pm

Joined: Feb 07, 2010
Posts: 2949
Trade Rating: +6
Location: Athens, Greece

So are the injectors controlled by the ECU? Is there an electrical connection to them?


	1.4i, 2001, 3-door, China Blue Repair safely - Drive safely

Lee

Posted: Mon Nov 08, 2010 3:24 pm

Joined: Feb 07, 2010
Posts: 13077
Trade Rating: +65
Location: England

Yep

Quote::

Function
The injector is triggered by the control unit, the solenoid inside the injector pulls up an armature connected to the nozzle needle. This causes fuel to be sprayed into the intake manifold.

V9977

Posted: Mon Nov 08, 2010 3:33 pm

Joined: Feb 07, 2010
Posts: 2949
Trade Rating: +6
Location: Athens, Greece

Excellent, that's what I wanted to know. I have no problem in this area at the moment but its good to know how it works. Cheers.


	1.4i, 2001, 3-door, China Blue Repair safely - Drive safely

Lee

Posted: Mon Nov 08, 2010 3:40 pm

Joined: Feb 07, 2010
Posts: 13077
Trade Rating: +65
Location: England

Sagem ECU Bosch ECU

Schumi

Posted: Sun Dec 05, 2010 2:41 pm

Joined: Feb 08, 2010
Posts: 901
Trade Rating: +1
Location: Istanbul / Turkey

Hi Lee. Which program is this. Its look like Peugeot Schematics.


	2005 206 RC RED Bilstein B14 Coilover / Brembo 4 Pot Front 330x28 - Rear 325x8 / Quaife ATB Limited Slip Diff / Janspeed Catback Lot's of CNC machined customs pars.

Lee

Posted: Sun Dec 05, 2010 2:44 pm

Joined: Feb 07, 2010
Posts: 13077
Trade Rating: +65
Location: England

That is Tolerance Data (similar to AutoData). Peugeot schematics are pretty rubbish for things like that.

Schumi

Posted: Sun Dec 05, 2010 2:58 pm

Joined: Feb 08, 2010
Posts: 901
Trade Rating: +1
Location: Istanbul / Turkey

Thanks Lee. I have that program ISO file but i never install that. I will try tomorrow. Thank you again.


	2005 206 RC RED Bilstein B14 Coilover / Brembo 4 Pot Front 330x28 - Rear 325x8 / Quaife ATB Limited Slip Diff / Janspeed Catback Lot's of CNC machined customs pars.

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