it says connect one wire to another in the diagnostic connector.. but does anyone have a DIAGRAM of the diagnostic connector showing the labels of each wire? or the full procedure?
the procedure for downloading codes from an OBD-I mazda FS-E engine is easily found on the net, but not for the much more common 4AFE..
thanks..
The diagram should be printed on a label under the cover for the diagnostic connector.
Use a metal paper clip or stiff metal wire to short terminals T1 to E1, turn the ignition switch to the on position, and count the check engine light flashes.
Ray O wrote: ..
what if there's no check engine light? (e.g. manual tranny, AE101 corolla). is there a pin to which an LED can be connected?
AFAIK, if the car is not equipped with a check engine light, then the computer does not have the capability to store error codes. Whether the transmission is manual or automatic has no bearing on whether the car will be equipped with a check engine light or not. Are you sure there is no check engine light or is it burnt out or did someone disconnect it?
What is going on with the car that you are looking for error codes?
Doesn't an ae101 have a diagnostic connector under the hood? It should.
it's actually the ae101 of someone i know. the car cuts out randomly while operating, but can immediately be restarted. this started happening after he did a top overhaul (warped head due to overheating). but i don't know much else about his problem, so i suggested dumping the error codes to get a general idea. it's a 1993 ae101, so it's OBD-I.
i asked about the CEL because my own car (a mazda 626 manual tranny OBD-I) does NOT have a CEL (on this car CEL is implemented by blinking OD, but manual tranny has no OD light). on the OBD-I mazda 626 manual tranny, one must connect an LED to a couple of pins in the diagnostic connector, this will blink out the codes.
A 1993 Corolla should have a check engine light, regardless of transmission. Toyota splurged so you don't have to mess with hooking up LED's. ;-)
Toyota uses the OD light as an indicator for the electronically controlled transmission trouble codes.
Use the pin short sequence I described earlier, although if there is no check engine light, there is not likely to be any codes stored in the computer.
Random problems are probably caused by a loose connector somewhere. Check all connectors that were touched when the engine work was done.
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