Trip computer

[Drummer87]

Not this tacho.

Never bothered me. But seeing I'm chasing around faults may as well get some niggles sorted.

Always the case when your happy you just go with the flow then when something bugs your happiness your fixing everything.

[rynaqui]

Bit of a read on G21 (Speedo) - blue connector

http://www.s2forum.com/forum/showpost.php?p=244288&postcount=5

[rynaqui]

G54 seems to be crankshaft sensor, don't know how that could be related

Must be something wrong if it's throwing up a G68 code.

As error, I think that yellow wire could be the cause.

"Something you can try is removing the coloured connectors at rear of cluster one at a time to see if the problem is associated with one of them.

T26 is the yellow one
T26a is the is the blue one

G21 (speedo) only uses blue connector
G3 (water) needs both
G5 (tacho) needs both
"

[Drummer87]

Awesome. Thanks rynaqui. Keep me busy for a few hours.

Would help if the ramp was clear to get a look at the sensor for connections.

[rynaqui]

Hopefully it's not too much of a ballache to sort out

[djh]

Hopefully it's not too much of a ballache to sort out

its an s2, what can go wrong

[rynaqui]

its an s2, what can go wrong

Replacing the radiator cost me a fair bit in other parts

[Drummer87]

Here's hoping it isn't the fore mentioned

Must be a sensor in question. But saying that when reset it always goes back to the same figures doesn't just hold at zero

[Error404]

IIRC the speed signal is a blue and white wire, and the signal to the cluster comes from the G68 via the ECU not direct, therefore you'd think if the cluster was getting the signal the ECU was too. The yellow wire for the fuel consumption signal from the ECU plugs in in the spaghetti of wires beneath the drivers parcel shelf under the dash.

Heres a pic posted by Mcandmar some years ago.



The yellow plug is the fuel consumption signal from the ECU. The red one is redundant and not plugged in IIRC.

If the yellow cable is plugged in a looks OK, continuity check between the yellow plug and the ECU.
You can also check continuity between blue/white wire into T26a (blue) and the ECU for the speed signal.

Attached is the wiring schematic

HTH

[Mikes2]

Some radios can also interfere with the operation of the trip computer. Guess how I know this

The speed signal is contained in the iso connectors for the radio to allow for altering the volume based on the speed of the vehicle. Some radios don't have this function or use a different connecting pin from that provided by the factory loom.

Try disconnecting the radio to check if trip computer function is restored

[GrantGam]

Some radios can also interfere with the operation of the trip computer. Guess how I know this

The speed signal is contained in the iso connectors for the radio to allow for altering the volume based on the speed of the vehicle. Some radios don't have this function or use a different connecting pin from that provided by the factory loom.

Try disconnecting the radio to check if trip computer function is restored

My trip computer and speedo have never been right since I changed my radio unit...

If I were to disconnect the radio to see if the fault stopped; is it just a case of linking out one wire (speed signal) so it's no longer connected to the radio?

[Mikes2]

That might work - do you have the pin outs for your radio as it's possible this wire is connected to a function on the radio that it shouldn't be. you can get wiring pin extractors for the connectors that will allow you to move the wire

[GrantGam]

That might work - do you have the pin outs for your radio as it's possible this wire is connected to a function on the radio that it shouldn't be. you can get wiring pin extractors for the connectors that will allow you to move the wire

Hey Mike, sorry I never had a notification of your reply!

I disconnected the stereo on Wednesday to see what happened but the problem persisted. I did leave the IOS connector harness connected though, could this have maybe still interfered with the trip computer?

My stereo is a Pioneer DEH-4700BT - I can't find anything fancy wrt pinout though, is there anything fancy that may be going into the stereo from the car side?

[Greg_S]

Just try disconnecting the ISO connectors entirely from the OEM loom