Diagnostic test - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

12-01-2001, 19:26

Does anyone know of a diagnostic test you can perform via your dashboard to test the car? If so explain in detail how to perform!

Homer? · 02-21-2002, 20:43

Can anyone answer this?
I need to do a diagnostic test on a EF 4L Ghia, I have the test codes but have no idea how to do It.

Jase_ELXR8 · 02-21-2002, 21:19

You need to use the self test connector and an analog meter or led....

you can get info here....

www.autoemf.com.au

Homer? · 02-21-2002, 21:26

Thanks for the link.
I thought there was an easier way.

Xyphoid · 02-22-2002, 02:41

The dash (Instrument Cluster) diagnostic mode will only give very little information regarding the ECU.

I.E. the only things you can deduce from the instrument cluster are

Coolant temp, (From sender)
Oil pressure, (From Sender)
Battery Voltage,
Gear Position, (From the Gear lever position sender),
R.P.M.
Speed. (From Transmission Sender)

The ECU gets its values from these senders, (and many more).

If these values are corrupted, then the ECU can be sent into limp home mode, (depending on the problem).

The best way to properly trace a problem is to do an ECU test.
But if any of the above (especially the Gear position) are stuffed, then at least you have some idea where a problem may lie.

Hope this helps
Cheers
Matt

snavy · 02-22-2002, 10:18

Quote:

Originally posted by Xyphoid
The dash (Instrument Cluster) diagnostic mode will only give very little information regarding the ECU.

I.E. the only things you can deduce from the instrument cluster are

Coolant temp, (From sender)
Oil pressure, (From Sender)
Battery Voltage,
Gear Position, (From the Gear lever position sender),
R.P.M.
Speed. (From Transmission Sender)

The ECU gets its values from these senders, (and many more).

If these values are corrupted, then the ECU can be sent into limp home mode, (depending on the problem).

The best way to properly trace a problem is to do an ECU test.
But if any of the above (especially the Gear position) are stuffed, then at least you have some idea where a problem may lie.

Hope this helps
Cheers
Matt

gear position mode 8 doesnt work on mine?? dunno is it meant to tell you what gear you are in????

Xyphoid · 02-22-2002, 18:43

Hey Snavy - Do you have a manual ???
On mine it comes up with little letters on the bottom right of the odo display, eg P r n D 3 2 1.
I think even on manuals it comes up with n d and maybe even r.
(supposedly EF/EL 8's have reduced torque (from the ECU, when in reverse ????)

snavy · 02-23-2002, 01:30

Quote:

Originally posted by Xyphoid
Hey Snavy - Do you have a manual ???
On mine it comes up with little letters on the bottom right of the odo display, eg P r n D 3 2 1.
I think even on manuals it comes up with n d and maybe even r.
(supposedly EF/EL 8's have reduced torque (from the ECU, when in reverse ????)

nope mines auto, i thought that feature cycles though your gears as your going, like some others car, like my FTO.

Xyphoid · 02-23-2002, 05:45

Yeah, I know what you mean,
It would be a very nice feature if it did this, unfortunately, it only shows what position the gear lever is in.
(saves you 1/16 of a second from looking down at the shift lever).

Its a good way to determine if the sender is stuffed, but apart from that, its of very little use. (Unless you are a big fan of the fairlane dash !)