Retrieving Trouble Codes from OBD I Systems

[TrueBoolean]

You step on the brake pedal while the cable is detached - the reason being the brake lights removes any leftover electricity left in the system that might cause the trouble codes to be remembered.

I think that made sense...

[BigWheel]

Do you leave the STI connected to ground while you do the battery and brake thing? Thanks

No but if you do it won't hurt anything. Just don't forget and leave the jump wire attached when you close the hood. I personally don't know anyone that's done that before.

[drof 89]

No but if you do it won't hurt anything. Just don't forget and leave the jump wire attached when you close the hood. I personally don't know anyone that's done that before.

OK. Got it.

[Levitan]

Thanks True!

[lancerevo]

Where is the check engine light located? I have a Kia pride and has never seen the CEL turns on. Could someone post a pic of the dash to show me where it is?

[bassman]

Here is the best picture I could find. The STI is the single connector on the right.

Once you've identified the trouble codes and fixed the problem detach the negative battery cable and step on the break peddle for 5 seconds. The light will go out unless there are other codes to be pulled.

2 places to put a wire on that single connector, where does the wire go exactly?

[FordFestiva]

On my '93, it's a single white pigtail connector with yellow wire and a green tracer.

[bassman]

ya, I found that little bugger hiding out of the way, I needed a temp senson and now I am getting proper milage ( about 38 to 44)

[econoaddict]

If you happen to know anyone with a decent scanner they can just plug into it and look at codes and some data as well.
We have 3 scanners that will work on tiva's. Genisys, Snap-On and an OTC.

[briggs]

Here is the best picture I could find. The STI is the single connector on the right.

Once you've identified the trouble codes and fixed the problem detach the negative battery cable and step on the break peddle for 5 seconds. The light will go out unless there are other codes to be pulled.

this confuses me because the connector on the right is a 2 wire.

[sc72]

this confuses me because the connector on the right is a 2 wire.

There are several on the right side and The STI to pull codes from is a single female spade in black plastic.

[XFSE71]

Don't forget if there are no codes to display, nothing will happen except the MIL (CEL) will go out and it will just sit there and stare at you.
Even worse, if the MIL comes on while driving, shutting the engine off will clear the engine running code. So light on during a drive pull codes before shut down.

[XFSE71]

code chart

[TorqueEffect]

Don't forget if there are no codes to display, nothing will happen except the MIL (CEL) will go out and it will just sit there and stare at you.
Even worse, if the MIL comes on while driving, shutting the engine off will clear the engine running code. So light on during a drive pull codes before shut down.

You know, funny thing about my car. I had long since shut it it down, but later I grounded the connector and still was able to pull the code. Probably just a fluke because it was a coolant sensor, and even with the engine off but the key in the on position, the ecu probably still saw the sensor was faulty because the voltages were out of range.

According to the Shop Manual, the coolant sensor is the only one that is at all times giving the ecu feedback, even when cranking cold, so I am guess even when the key is in the on position without the engine running, it still is sending feedback to the ecu.

[XFSE71]

Running codes are different from hard faults. A hard fault is something broken right now (ECT, TPS). Running codes are only out of range right now, not electrically broken (no EGR flow, O2 not switching). You're right it is all about how the PCM (ECA/ECU) tests the input signals.