The DLC is located on the left strut tower in the engine compartment. Reading The On/Off Flashes Of The Check Engine LightĪs mentioned at the beginning, your OBD I Toyota Corolla flashes the malfunction indicator light (MIL -also known as the check engine light CEL) once you have jumpered terminals TE1 and E1 in the diagnostic link connector (DLC). What I did was to rewire the connectors based on information from others who have done the same and it worked to a certain extent. I bought a similar cable for my bj since it's a Jdm and doesn't have the obd plug, but it did not work straight away. This is one reason why obd 2 plug was implemented, to standardise the output pinout. This is why when you plug in a hand held scanner it asks for your cars make model and year, so that it can recognize the signal lines. A good way to check before buying a scanner is to get the car scanned from a place and see if their scanner is able to communicate with your car.Īlso most of these cables don't work because the output pins in each car model even from the same manufacturer is different due to age, model difference, region etc. Your get what you pay for with these cheap elm adapters.Ī decidacted good quality handheld scan tool however will work since they support most of the obd protocols even with convertor cables.
#Reading 1994 toyota diagnostic port iso
They have the most common like iso 9142 and j1850 but if your cars protocol is different then there is no use. Your car also has to support the obd protocols supported by the elm 327 adapter. However it is still possible to get codes though it can't be guaranteed. If your car doesn't have an obd 2 plug that means native support is limited.
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Your cars ecu has to support the protocol. First of all obd 2 is a standard ecu operation protocol and not just a plug.