EDP8 Manual Version1.0

28
 Autocom Diagnostic Partner AB - EDP8 Manual 1 This guide handle the most import ant functions in EDP8,  you can nd more info under the directhelp. EDP8 - Engine diagnostic partner  Autocom Diagnos tic Partner AB EDP8 Reference Guide, Version 1.0

Transcript of EDP8 Manual Version1.0

Page 1: EDP8 Manual Version1.0

8/13/2019 EDP8 Manual Version1.0

http://slidepdf.com/reader/full/edp8-manual-version10 1/27

 Autocom Diagnostic Partner AB - EDP8 Manual

1

This guide handle the most important functions in EDP8,

 you can nd more info under the directhelp.

EDP8 - Engine diagnostic partner

 Autocom Diagnostic Partner AB

EDP8 Reference Guide, Version 1.0

Page 2: EDP8 Manual Version1.0

8/13/2019 EDP8 Manual Version1.0

http://slidepdf.com/reader/full/edp8-manual-version10 2/27

 Autocom Diagnostic Partner AB - EDP8 Manual

2

1. Content EDP8

With the aid of EDP8 the user can check:

1. Content EDP8 Page 2

2. Check before measurement Page 2

3. Check the following before starting measurement Page 3

4. Engine temperature Page 3

5. Relative compression Page 4

6. Checking the fuel pressure Page 8

6.1 Checking the fuel pressure (K-Jetronic) Page 96.2 Checking the fuel pressure (L-H Motronic) Page 12

6.3 Checking the fuel pressure (Mono-Jetronic) Page 15

7. Fuel Pressure/Vaccum Page 16

8. Flow Page 17

9. generall measurement (vaccum, current, voltage) Page 19

10. Ignition voltage, Secondary (limited) Page 25

11. File, save and print result Page 26

12. Technical data Page 27

2. Introduction to EDP8There is a great deal of electronics in today’s cars, and this has led to changes in troubleshooting

techniques. Nowadays, this change makes quite different demands on the troubleshooting equipment,

information, training and on the technician whose job it is to do the troubleshooting. Making a quick and

accurate diagnosis means having access to the right diagnosis equipment.

How is a modern car engine designed? The basic principle of a modern engine is more or less the same

as that of the rst engines ever made. This is true of the working principle (two-stroke, four-stroke) and the

mechanical parts of the motor. The mechanical parts have of course been developed and improved over

the years, but the principle is still the same. The areas where development has progressed furthest are

the fuel and ignition systems. Here, the mechanical parts have been replaced by electronics. As far as the

troubleshooting procedure is concerned, it is very important to begin by thoroughly checking all the visible

parts of the engine, such as vacuum hoses, cables, sensors and so on. When you have checked theseitems, the time has come to connect the diagnosis equipment.

What should you check with the diagnosis equipment? The equipment must be able to tell the user how the

electronics are working. This can be achieved with the DIAGNOSIS INSTRUMENT, which allows serial and

parallel measurement of the electronics. For a correct diagnosis it is also important to check the ignition

voltage, fuel pressure, vacuum, compression, currents and the vehicle’s exhaust readings. Using the EDP 8

and a 4(5) gas meter you can now perform a more complete diagnosis.

Before beginning the work of making a diagnosis, the user must always refer to test methods and technical

data recommended by the vehicle manufacturer. This enables the user to draw the correct conclusions.

Page 3: EDP8 Manual Version1.0

8/13/2019 EDP8 Manual Version1.0

http://slidepdf.com/reader/full/edp8-manual-version10 3/27

 Autocom Diagnostic Partner AB - EDP8 Manual

3

3. Check the following before starting measurement:

- Battery condition.

- If the starting voltage of the battery is low (below about 10 V) it must be charged or replaced.

- When testing with the EDP8 it may be a good idea to connect an extra power source to the

vehicle.

- To give reliable results, EDP8 requires a continuous power supply

- A power failure may result in the test giving incorrect readings or being aborted.

- The battery terminals on the DIAGNOSIS INSTRUMENT must be connected to the battery poles, red to

plus (+) and black to minus (–).- Connect the EDP 8 to the “ABS” and “PROBE” terminals on the DIAGNOSIS INSTRUMENT.

4. Engine temperature - EDP8

General

The temperature sensor delivers information about the temperature of the engine. Having the sensor

connected all the time means that the engine temperature is displayed throughout all the tests performed

with the EDP8. This information is highly important for ensuring that the test results are as correct as

possible.

Preparation

Make sure that the ignition is disconnected. Connect the EDP8 to the diagnosis instrument. Take out the

engine oil dipstick. Adjust the length of the probe (A) by moving the adjuster (B) so that the length is thesame as that of the dipstick. Now insert the probe in the dipstick hole of the engine. Connect the 3.5 mm jack

of the temperature sensor to the “Temperature“ socket (9) on the EDP8.

Start measurement

The reading is automatically displayed on the screen during all the tests performed with the EDP8.

Page 4: EDP8 Manual Version1.0

8/13/2019 EDP8 Manual Version1.0

http://slidepdf.com/reader/full/edp8-manual-version10 4/27

Page 5: EDP8 Manual Version1.0

8/13/2019 EDP8 Manual Version1.0

http://slidepdf.com/reader/full/edp8-manual-version10 5/27

 Autocom Diagnostic Partner AB - EDP8 Manual

5

Program functions

Close Closes the program.

Help Help les.

Print Printout.

Car data Choose cylinders, ignition sequence and fuel type here.

Settings Here you choose the measuring range of the tong ammeter, and trigger for cylinder 1.

  Cars with a type DI ignition system (Saab) must be run without trigger.

Measure During the measurement, Crank is displayed on the screen for about 10 seconds.value The readings are displayed her as percentages (best cylinder = 100%).

Graph This is the “normal” way to present the measurement.

Page 6: EDP8 Manual Version1.0

8/13/2019 EDP8 Manual Version1.0

http://slidepdf.com/reader/full/edp8-manual-version10 6/27

 Autocom Diagnostic Partner AB - EDP8 Manual

6

Checking engine compression - EDP8

WARNING! (for petrol-engined vehicles)

When testing the compression, always disconnect the ignition system connections to prevent the production

of hazardous voltages. In vehicles with electronic and transistorised ignition systems, hazardous voltages

may occur in both the high-voltage and the low-voltage circuits. Flashovers in the ignition system may also

damage the vehicle’s electronics. On vehicles tted with a catalytic converter and a lambda sond, the fuel

supply must also be disconnected. This is to prevent damage to the catalytic converter and the lambda sond.

Preparations (the description may vary slightly from one model to another)

Petrol (gasoline) - Make sure that the ignition is disconnected. Disconnect the lead from ignition coil pin 1.

On cars tted with a catalytic converter and a lambda sond, remove the fuel pump relay or disconnect the

connections to the injectors.

Diesel - On diesel-powered vehicles, disconnect the leads to the fuel shut-off valve (to prevent damage to

the catalytic converter).

Connecting the compression meter 

Remove the spark plugs/glowplugs. Connect the correct spark plug adapter/glowplug adapter (C) to the

cylinder to be tested. Connect together the hose (B) and the spark plug adapter/glowplug adapter (C). Then

connect the hose (B) to the pressure sensor (A). Connect the 3.5 mm jack to the “Pressure” socket (7) onthe EDP unit.

 

Start measurement

Choose the test for checking engine compression. Under the “Car data“ button you choose cylinders,ignition sequence and fuel type. Under the “Settings“ button, choose measuring range for the pressure

sensor. Measuring range for petrol 0 – 1500 kPa or for diesel 0 – 4000 kPa. To activate the measurement,

press the “Measure“ button in the program. Before measurement begins, information about which cylinder

will be tested is displayed. When you choose OK, measurement starts and “Crank“ is displayed for about

10 seconds. During the measurement, keep the throttle fully open and crank the engine for about

ten seconds. If you want to repeat the measurement, you must rst release the pressure in the line. To do

this, turn the ball valve lever (B) to the on position. When you have nished measuring the compression of

cylinder 1, move the spark plug adapter to cylinder 2, and so on. Compare the reading with the technical

data for the vehicle (see workshop manual).

Normal compression

If the readings agree with the technical data for the engine, measurement is complete. Reinstate.

Page 7: EDP8 Manual Version1.0

8/13/2019 EDP8 Manual Version1.0

http://slidepdf.com/reader/full/edp8-manual-version10 7/27

 Autocom Diagnostic Partner AB - EDP8 Manual

7

Compression low

If the compression is low, check the following:

- Cylinder head gasket

- Valves

- Cracks in cylinder head, engine block, valve or piston

Warning! High pressure! (0-40 bar)

Note: Before you disconnect the hoses, you must release the pressure with valve D.

Program functions

Close - Closes the program.

Help - Help les.

Print - Printout.

Car data - Choose cylinders, ignition sequence and fuel type here.

Settings - Choose the measuring range for the pressure sensor here (1500 kPa for petrol / 4000 kPa for

diesel).

Here you can deselect the graphs you do not want to see.

Measure - Before measurement begins, information about which cylinder will be tested is displayed.

Crank - When you choose OK, measurement starts and “Crank” is displayed for about 10 seconds.

Page 8: EDP8 Manual Version1.0

8/13/2019 EDP8 Manual Version1.0

http://slidepdf.com/reader/full/edp8-manual-version10 8/27

 Autocom Diagnostic Partner AB - EDP8 Manual

8

6. Checking the fuel pressure - EDP8

Program functions

Close Closes the program.

Help Help les.

Print Printout.

Car data Choose cylinders, ignition sequence and fuel type here.

Settings Choose the measuring range for the pressure sensor here (400 kPa / 800 kPa).

Measure/Stop You start and stop the tests here.

Page 9: EDP8 Manual Version1.0

8/13/2019 EDP8 Manual Version1.0

http://slidepdf.com/reader/full/edp8-manual-version10 9/27

 Autocom Diagnostic Partner AB - EDP8 Manual

9

6.1 Checking the fuel pressure (K-Jetronic) - EDP8

Preparations

Make sure that the ignition is off. Release the pressure in the fuel system.

Connecting the pressure meter 

Connect the pressure sensor (A) between the control pressure valve and the fuel quantity meter. Use a

three-way valve (B) with the associated hoses and nipples (the three-way valve is not included).

The three-way valve (B) has one input and two outputs as well as a valve that can be used to open or close

one of the outputs. The input marked A must be connected to the fuel quantity meter.

The output marked B must be connected to the control pressure valve. The valve is also connected to this

output. The output with a pressure gauge symbol must be connected to the pressure sensor (A). Then

connect the 3.5 mm jack of the pressure sensor to the “Pressure“ socket (7) on the EDP8.

Starting the fuel pump

Start the engine. If the engine does not start, bridge the pins to the fuel pump relay (system relay) in the relay

holder (see electrical diagram). The fuel pump will now run continuously.

Measuring the system pressure

Note: The valve must be closed.Choose the test for checking fuel pressure. Under the “Car data“ button you choose cylinders, ignition

sequence and fuel type. Under the “Settings“ button, choose measuring range 0 – 800 kPa for the pressure

sensor.

To start measurement, press the “Measure“ button in the program. The system pressure is now measured.

Compare the pressure reading with the technical data for the system (see workshop manual).

To stop the test, press the “Stop“ button in the program.

Note: The three-way valve (B) is not included in article 425 807 pressure sensor.

Normal system pressure

If the system pressure agrees with the technical data, you can proceed to check the control pressure.

System pressure lowIf the system pressure is low, check the following:

Page 10: EDP8 Manual Version1.0

8/13/2019 EDP8 Manual Version1.0

http://slidepdf.com/reader/full/edp8-manual-version10 10/27

 Autocom Diagnostic Partner AB - EDP8 Manual

10

- Check for external leakage

- Check that the accumulator is not leaking

- Check that the pre-pump is working (on certain cars)

- Check lters, strainers on pre-pump and fuel lines for clogging

- Try a new fuel pump

System pressure high

If the system pressure is high, check the following:

- Check that the return line is not blocked

Note: The system pressure and the shutoff pressure can be adjusted (see the workshop manual).

Measuring the control pressure - cold engine

Note: The valve must be open.

The engine must be switched off and cold. The supply to the electric heating of the control pressure valve

must be disconnected (on cars with heating). Bridge the pins to the fuel pump relay (system relay) in the

relay holder (see electrical diagram). The fuel pump will now run continuously. Choose the test for checking

fuel pressure. Under the “Car data“ button you choose cylinders, ignition sequence and fuel type. Under

the “Settings“ button, choose measuring range 0 – 800 kPa for the pressure sensor. To start measurement,

press the “Measure“ button in the program. The system pressure can now be read. Compare the pressure

reading with the technical data for the system (see workshop manual). To stop the test, press the “Stop“button in the program.

Normal control pressure - cold engine

If the cold engine control pressure agrees with the technical data, you can proceed to check the warm engine

control pressure.

Control pressure low - cold engine

If the cold engine control pressure is low, try a new control pressure valve.

Control pressure high - cold engine

If the cold engine control pressure is high, check the following:

- Check that the return line is not blocked

Measuring the control pressure - warm engine

Note: The valve must be open.

Connect the supply to the control pressure valve heating (on cars with heating). Start the engine and warm

it up. Choose the test for checking fuel pressure. Under the “Car data“ button you choose cylinders, ignition

sequence and fuel type. Under the “Settings“ button, choose measuring range 0 – 800 kPa for the pressure

sensor. To start measurement, press the “Measure“ button in the program. The system pressure can now be

read. Compare the pressure reading with the technical data for the system (see workshop manual). To stop

the test, press the “Stop“ button in the program.

Note: Take the nal reading when the pressure has stopped rising.

Normal control pressure - warm engineIf the warm engine control pressure agrees with the technical data, you can proceed to check the full-load

enrichment. If the vehicle does not have this function, proceed to check the shutoff pressure.

Control pressure low - warm engine

If the warm engine control pressure is low, check the following:

- Check the voltage to the control pressure valve

- Check the resistance of the control pressure valve

- If the resistance is wrong or if the control pressure valve is open circuit, replace the valve.

Control pressure high - warm engine

If the warm engine control pressure is high, check the following:

- Check that the return line is not blocked

Measuring the full-load enrichment

Note: The valve must be open.

Page 11: EDP8 Manual Version1.0

8/13/2019 EDP8 Manual Version1.0

http://slidepdf.com/reader/full/edp8-manual-version10 11/27

 Autocom Diagnostic Partner AB - EDP8 Manual

11

Start the engine or bridge the pins to the fuel pump relay (system relay) in the relay holder (see electrical

diagram). Choose the test for checking fuel pressure. Under the “Car data“ button you choose cylinders,

ignition sequence and fuel type. Under the “Settings“ button, choose measuring range 0 – 800 kPa for the

pressure sensor. To start measurement, press the “Measure“ button in the program. Pump out the pressure

from the control pressure valve. Important: Do not pump too strongly, as this might damage the control

pressure valve. The control pressure will now increase. Compare the reading with the technical data for the

system (see workshop manual). When the hose to the vacuum pump is disconnected, the control pressure

must return to the original value. To stop the test, press the “Stop“ button in the program.

Normal full-load enrichment

If the full-load enrichment agrees with the technical data, you can proceed to check the shut-off pressure.

Incorrect full-load enrichment

If the full-load enrichment is incorrect, check the following:

- Check that the vacuum hose is sound and properly connected

- Replace the control pressure valve

Measuring the shut-off pressure

Note: The valve must be open.

Start the engine or bridge the pins to the fuel pump relay (system relay) in the relay holder (see electrical

diagram). This is in order to build up a pressure in the system. Switch off the engine and note the pressurewhen it has stabilised and for about one minute after that.

Reading the pressure: Choose the test for checking fuel pressure. Under the “Car data“ button you choose

cylinders, ignition sequence and fuel type. Under the “Settings“ button, choose measuring range 0 – 800 kPa

for the pressure sensor. To start measurement, press the “Measure“ button in the program. Compare the

shut-off pressure reading with the technical data for the vehicle (see workshop manual).

Normal shut-off pressure

If the shut-off pressure is normal, proceed to the check “Shut-off pressure after about 20 minutes”.

Incorrect shut-off pressure

If the pressure is incorrect, but does not fall, the system pressure and the shut-off pressure must be adjusted.

Falling shut-off pressure

Note: Switch on the ignition for a short time to allow the pressure to build up again.

Close the valves and note the pressure reading after about ve minutes. As long as there is pressure in the

system, the accumulator will compensate for any leakage.

If the pressure stops falling, check the following:

- Leakage on the fuel line from the control pressure valve

- The control pressure valve is passing too much fuel (on certain models). Try a new valve.

- The system pressure valve is not tight (on certain models). Clean or replace the needle valve.

If the pressure continues to fall, check the following:

- Check for external leakage- Check that the system pressure valve is tight

- Check the non-return valve in the fuel pump

Shut-off pressure after about 20 minutes

Note the pressure after about 20 minutes. Compare the shut-off pressure reading with the technical data for

the vehicle (see workshop manual). If the pressure is incorrect, there may be problems starting the engine

when warm.

Normal shut-off pressure after about 20 minutes

Reinstate. Collect any fuel that escapes when the pressure gauge is removed.

Low shut-off pressure after about 20 minutes

If the shut-off pressure is low after about 20 minutes, carry out the “Falling shut-off pressure” test (see

above).

Page 12: EDP8 Manual Version1.0

8/13/2019 EDP8 Manual Version1.0

http://slidepdf.com/reader/full/edp8-manual-version10 12/27

 Autocom Diagnostic Partner AB - EDP8 Manual

12

6.2 Checking the fuel pressure (L. LH. Motronic etc.) - EDP8

Preparations

Make sure that the ignition is off. Release the pressure in the fuel system.

CheckingStart by check that the vacuum hose from the pressure regulator is sound and is not blocked. If the hose is

sound, re-connect it to the pressure regulator.

Connecting the pressure meter 

Connect the pressure sensor (A) between the fuel line (from the pump) and the distribution pipe (the pipe

with the injectors). Use the three-way valve (B) with the associated hoses and nipples (for the correct choice

of nipple, see the table).

The three-way valve (B) has one input and two outputs as well as a valve that can be used to open or close

one of the outputs. The input marked A must be connected to the fuel line coming from the pump.

The output marked B must be connected to the distribution pipe. The valve is also connected to this output.

The output with a pressure gauge symbol must be connected to the pressure sensor (A).

Then connect the 3.5 mm jack of the pressure sensor to the “Pressure“ socket (7) on the EDP8.

Page 13: EDP8 Manual Version1.0

8/13/2019 EDP8 Manual Version1.0

http://slidepdf.com/reader/full/edp8-manual-version10 13/27

 Autocom Diagnostic Partner AB - EDP8 Manual

13

 

Starting the fuel pump

Start the engine. If the engine does not start, bridge the pins to the fuel pump relay (system relay) in the relay

holder (see electrical diagram). The fuel pump will now run continuously.

Measuring the system pressure

Note: The valve must be open.

Choose the test for checking fuel pressure. Under the “Car data“ button you choose cylinders, ignition

sequence and fuel type. Under the “Settings“ button, choose measuring range 0 – 400 kPa for the pressure

sensor. To start measurement, press the “Measure“ button in the program. The system pressure is now

measured. Compare the pressure reading with the technical data for the system (see workshop manual).

To stop the test, press the “Stop“ button in the program.

Normal system pressure

If the system pressure agrees with the technical data, you can proceed to check the pressure regulator.

System pressure low

Squeeze the return line and check whether the pressure rises. Note: The pressure must not go above 6.0

bar.

If the pressure rises rapidly, check the following:

- Pressure regulator (replace if necessary)

- Check whether the system pressure is normal

If the pressure rises slowly:

- Check lters, strainers on pre-pump and fuel lines for clogging

- Check that the system pressure is normal

If the pressure does not rise:

- Try a new fuel pump

- Check that the system pressure is normal

System pressure high

Switch off the ignition and remove the bridging (if any) from the fuel pump relay. Disconnect the return line

from the pressure regulator and blow into the line.

Page 14: EDP8 Manual Version1.0

8/13/2019 EDP8 Manual Version1.0

http://slidepdf.com/reader/full/edp8-manual-version10 14/27

 Autocom Diagnostic Partner AB - EDP8 Manual

14

If the line is OK:

- Try a new pressure regulator 

- Check that the system pressure is normal

If the line is blocked:

- Check whether the line has been crushed or is blocked

Checking the pressure regulator 

Note: The valve must be open.Connect a vacuum pump to the pressure regulator and pump the air out of the regulator. Choose the test

for checking fuel pressure. Under the “Cardata” button you choose cylinders, ignition sequence and fuel

type. Under the “Settings“ button, choose measuring range 0 – 400 kPa for the pressure sensor. To start

measurement, press the “Measure“ button in the program. The system pressure is now measured. The new

reading must be lower than the previous one. Compare the reading with the technical data for the system

(see workshop manual). When the hose to the vacuum pump is disconnected, the system pressure must

increase again. To stop the test, press the “Stop“ button in the program.

If the system pressure does not change:

- Try a new pressure regulator 

Checking the shut-off pressure regulator Note: The valve must be open.

Check after at least 20 minutes that the pressure has not fallen below 2 bar. Choose the test for checking

fuel pressure. Under the “Car data“ button you choose cylinders, ignition sequence and fuel type. Under

the “Settings“ button, choose measuring range 0 – 400 kPa for the pressure sensor. To start measurement,

press the “Measure“ button in the program. The shutoff pressure will now be read. Compare the pressure

reading with the technical data for the system (see workshop manual). To stop the test, press the “Stop“

button in the program.

 

If the shut-off pressure is OK:

- Finish the measurement procedure

If the pressure falls too rapidly:

- Check that the injection and cold start valve is not leaking- Check that the non-return valve in the fuel pump is not leaking

- Check that the fuel lines are not leaking

- Try a new pressure regulator 

Finishing the measurement procedure

Collect any fuel that escapes when the pressure gauge is removed. Reinstate.

Page 15: EDP8 Manual Version1.0

8/13/2019 EDP8 Manual Version1.0

http://slidepdf.com/reader/full/edp8-manual-version10 15/27

 Autocom Diagnostic Partner AB - EDP8 Manual

15

6.3 Checking the fuel pressure (Mono-Jetronic) - EDP8

Preparations

Make sure that the ignition is off. Release the pressure in the fuel system.

Connecting the pressure meter 

Connect the pressure sensor (A) between the fuel line (from the pump) and the fuel inlet of the throttle

housing. Use a three-way valve (B) with the associated hoses and nipples (the three-way valve is not

included).The three-way valve (B) has one input and two outputs as well as a valve that can be used to open

or close one of the outputs. The input marked A must be connected to the fuel line coming from the pump.The output marked B must be connected to the fuel inlet of the throttle housing. The valve is also connected

to this output. The output with a pressure gauge symbol must be connected to the pressure sensor (A). Then

connect the 3.5 mm jack of the pressure sensor to the “Pressure“ socket (7) on the EDP8.

Starting the fuel pump

Start the engine. If the engine does not start, bridge the pins to the fuel pump relay (system relay) in the relay

holder (see electrical diagram). The fuel pump will now run continuously.

Measuring the system pressure

Note: The valve must be open.

Choose the test for checking fuel pressure. Under the “Car data“ button you choose cylinders, ignition

sequence and fuel type. Under the “Settings“ button, choose measuring range 0 – 400 kPa for the pressuresensor. To start measurement, press the Measure button in the program. The system pressure is now

measured. Compare the pressure reading with the technical data for the system (see workshop manual).

To stop the test, press the “Stop“ button in the program.

Normal system pressure

If the system pressure agrees with the technical data, you can proceed to check the holding pressure.

System pressure low

If the system pressure is low, replace the upper part of the injection unit: 

System pressure high

If the system pressure is high, the following should be checked:

- Check that the return line is clear - Check the upper part of the injection unit and replace it if necessary.

Note: The upper part and the components of the fuel pressure regulator are matched to each other.

Measuring the holding pressure

Note: The valve must be open.

Switch off the engine or remove the bridging. Check the holding pressure for ve minutes. Choose the test

for checking fuel pressure. Under the “Car data“ button you choose cylinders, ignition sequence and fuel

type. Under the “Settings“ button, choose measuring range 0 – 400 kPa for the pressure sensor. To start

measurement, press the Measure button in the program. The holding pressure can now be read. Compare

the pressure reading with the technical data for the system (see workshop manual).

To stop the test, press the “Stop“ button in the program.

Normal holding pressure

Finish the measurement procedure.

Holding pressure low

If the holding pressure falls below the prescribed value, the following should be checked:

- Lines and connections for leaks

- Fuel pump non-return valve

- O-rings around the injection valve

- Whether there is a leak at the injection valve

- Whether the fuel pressure regulator is faulty

Finishing the measurement procedure

Collect any fuel that escapes when the pressure gauge is removed. Reinstate.

Page 16: EDP8 Manual Version1.0

8/13/2019 EDP8 Manual Version1.0

http://slidepdf.com/reader/full/edp8-manual-version10 16/27

 Autocom Diagnostic Partner AB - EDP8 Manual

16

7. Fuel pressure/vacuum - EDP8

The “Fuel pressure/vacuum” test checks the operation of the fuel pressure regulator. The fuel pressure

regulator is usually located at one end of the distribution pipe. Its purpose is to regulate the fuel pressure in

the fuel system. The fuel pressure regulator is set to maintain a fuel pressure of about 2.5 to 3.0 bar (varies

from one model to another). One end of the fuel pressure regulator is connected to the induction manifold

and is subject to the engine vacuum. The vacuum is greatest when the engine is idling and the throttle is

closed. As a result of this, the fuel pressure falls by about 0.5 bar (varies from one model to another).

Preparation (for L. LH and Motronic type fuel systems )

Make sure that the ignition is disconnected. Release the pressure in the fuel system. Connect the pressure

sensor (A) between the fuel line (from the pump) and the distribution pipe (the pipe with the injectors). Use

the three-way valve (B) with the associated hoses and nipples (the three-way valve is not included). Connectthe T-piece of the vacuum sensor (C) between the fuel pressure regulator and its vacuum hose.

Then connect the 3.5 mm jack of the pressure sensor to the “Pressure“ socket (7) on the EDP8.

Connect the 3.5 mm jack of the vacuum sensor to the “Vaccum“ socket (8) on the EDP8.

Connect the EDP8 to the diagnosis instrument. Start the engine.

Note: The connection arrangement may vary slightly from one fuel injection system to another)

 

Starting measurement of the fuel pressure/vacuum

Note: The valve must be open.Choose the test for checking fuel pressure/vacuum. Under the “Car data“ button you choose cylinders,

ignition sequence and fuel type. Under the Settings button, choose the measuring range for the pressure

sensor here (400 kPa / 800 kPa). To activate the measurement, press the “Measure“ button in the program.

Page 17: EDP8 Manual Version1.0

8/13/2019 EDP8 Manual Version1.0

http://slidepdf.com/reader/full/edp8-manual-version10 17/27

 Autocom Diagnostic Partner AB - EDP8 Manual

17

The system pressure and the vacuum are now measured. Compare the pressure readings with the technical

data for the system (see workshop manual).

Program functions

Close  Closes the program.

Help  Help les.

Print  Printout.

Car data  Choose cylinders, ignition sequence and fuel type here.

Settings Choose the measuring range for the pressure sensor here (400 kPa / 800 kPa).Measure/Stop You start and stop the tests here.

 

8. Flow - EDP8

Preparations

Make sure that the ignition is off. Release the pressure in the fuel system.

Connecting the owmeter 

Connect the owmeter (A) between the fuel line (from the lter) and the fuel distributor (observe the direction

of ow). Then connect the 3.5 mm jack of the owmeter to the “Flow“ socket (10) on the EDP8.

Start measurement

Choose the test for checking fuel ow. Under the “Car data“ button you choose cylinders, ignition sequence

and fuel type. Under the “Settings“ button, choose measuring range 5 or 20 litres/min for the ow sensor.

Start the engine and let it idle for a while to clear any air. To start measurement, press the “Measure“ button

in the program. The ow can now be read. Compare the pressure reading with the technical data for the

system (see workshop manual). To stop the test, press the “Stop“ button in the program.

Page 18: EDP8 Manual Version1.0

8/13/2019 EDP8 Manual Version1.0

http://slidepdf.com/reader/full/edp8-manual-version10 18/27

Page 19: EDP8 Manual Version1.0

8/13/2019 EDP8 Manual Version1.0

http://slidepdf.com/reader/full/edp8-manual-version10 19/27

Page 20: EDP8 Manual Version1.0

8/13/2019 EDP8 Manual Version1.0

http://slidepdf.com/reader/full/edp8-manual-version10 20/27

 Autocom Diagnostic Partner AB - EDP8 Manual

20

Vacuum, general measurement - EDP8

Preparation

Connect the 3.5 mm jack of the vacuum sensor to the “Vaccum“ socket (8) on the EDP8.

Start measurement

Choose the test for checking vacuum. Under the”Car data” button you choose cylinders, ignition sequence

and fuel type. To start measurement, press the “Measure“ button in the program. The negative pressure willnow be measured. To stop the test, press the “Stop“ button in the program.

Program functions

Close  Closes the program.

Help  Help les.

Print  Printout.

Car data  Choose cylinders, ignition sequence and fuel type here.

Measure/Stop You start and stop the tests here.

Page 21: EDP8 Manual Version1.0

8/13/2019 EDP8 Manual Version1.0

http://slidepdf.com/reader/full/edp8-manual-version10 21/27

 Autocom Diagnostic Partner AB - EDP8 Manual

21

 

Current, general measurement - EDP8

Preparation

Connect the 3.5 mm jack of the tong ammeter to the “Current“ socket (6) on the EDP8.

Page 22: EDP8 Manual Version1.0

8/13/2019 EDP8 Manual Version1.0

http://slidepdf.com/reader/full/edp8-manual-version10 22/27

 Autocom Diagnostic Partner AB - EDP8 Manual

22

Start measurement

Choose the test for checking current. Under the “Car Data“ button you choose cylinders, ignition sequence

and fuel type. Under the “Settings“ button, choose a measuring range for the tong ammeter (200 – 2000 A).

To start measurement, press the “Measure“ button in the program. The current will now be read. To stop the

test, press the “Stop“ button in the program.

Program functions

Close  Closes the program.Help  Help les.

Print  Printout.

Car data  Choose cylinders, ignition sequence and fuel type here.

Settings Choose here the measuring range for the tong ammeter (200, 600, 1200 or 2000 A).

Measure/Stop You start and stop the tests here.

Page 23: EDP8 Manual Version1.0

8/13/2019 EDP8 Manual Version1.0

http://slidepdf.com/reader/full/edp8-manual-version10 23/27

 Autocom Diagnostic Partner AB - EDP8 Manual

23

Voltage, general measurement - EDP8

Preparation

Connect the 3.5 mm jack of the probe to the “Low voltage“ socket (5) on the EDP8.

Page 24: EDP8 Manual Version1.0

8/13/2019 EDP8 Manual Version1.0

http://slidepdf.com/reader/full/edp8-manual-version10 24/27

Page 25: EDP8 Manual Version1.0

8/13/2019 EDP8 Manual Version1.0

http://slidepdf.com/reader/full/edp8-manual-version10 25/27

 Autocom Diagnostic Partner AB - EDP8 Manual

25

10. Ignition voltage, secondary side (limited) EDP8

Warning!

 Avoid contact with the parts of the ignition system when the engine is running. Electronic ignition systems

operate with very high voltages on both the primary and the secondary side. Never disconnect connectors

and cables to any of the ignition system components when the ignition is on. Flashovers in the ignition

system may damage the vehicle’s electronics.

Preparations (the description may vary slightly from one model to another)

Make sure that the ignition is disconnected. Connect the EDP 8 to the diagnosis instrument. Connect the

inductive clip (A) to the ignition cable of cylinder 1. Then connect the 3.5 mm jack of the inductive clip to the

“Trigger“ socket (4) on the EDP8.

Start measurement

Start measurement by pressing the “Trig test“ button (1) on the side of the EDP8 (the engine must be

running). The LED (3) on the EDP8 must now start to ash green. This ashing indicates that the secondary

side of the ignition system is delivering an ignition voltage (this signal is also used as a trigger signal in other

measurements with the EDP8).

Page 26: EDP8 Manual Version1.0

8/13/2019 EDP8 Manual Version1.0

http://slidepdf.com/reader/full/edp8-manual-version10 26/27

 Autocom Diagnostic Partner AB - EDP8 Manual

26

 

General

This type of test is very limited when it comes to checking the secondary side of the ignition system.

But it does give the user a clear indication of whether or not the secondary side of the ignition system is

delivering an ignition voltage.

The engine does not start

If there is no signal at all, this may be due, among other things, to defective ignition coil or ignition output

stage, or absence of a signal from the control unit to the ignition coil or ignition output stage.

The engine starts but does not run smoothly

If there is no signal on one of the ignition cables this may be due to a defective distributor cap, ignition cable

or spark plug. You can also check for these faults by moving the inductive clip to the other ignition cables(switch off the engine rst).

11. Archive, save, and print result - EDP8

 Archive - The Archive function is not activated in this version. It will be added later.

Save - The Save function is not activated in this version. It will be added later.

Print - By pressing the “Print“ button in the program you can print out the oscilloscope image displayed on

the screen.

Page 27: EDP8 Manual Version1.0

8/13/2019 EDP8 Manual Version1.0

http://slidepdf.com/reader/full/edp8-manual-version10 27/27

 Autocom Diagnostic Partner AB - EDP8 Manual

Example of printout

12. Technical data - EDP8

Measuring ranges

Voltage (low) … 0 - 36 V

Current ……….. 0 - 200 A

  0 - 600 A

  0 - 1200A

  0 - 2000A

Vacuum ………… -1 - 0 bar 

Pressure (comp.) …. 0 - 15 bar (0 - 1500 kPa)

  0 - 40 bar (0 - 4000 kPa)

Pressure (fuel) ……. 0 - 4 bar 

  0 - 8 bar 

Connections

 A: To “PROBE” socket on ADP186 (Meko Tech diagnosis)

B: To “ABS” socket on ADP 186 (Meko Tech diagnosis)

1. Button for trigger 

2. Extra

3. LED (green = trigger.

Red = voltage above 9 volts)

4. Inductive pick-up

5. Voltage probe

6. Current tong

7. Pressure sensor 8. Vacuum sensor 

9. Temperature sensor 

10. Flow sensor 

11. Extra