1994 Toyota Pickup: Retrieve Error Codes Without OBD Scan Tool?

Yes its possible.The Error codes can be retrieved manually without OBD 1 scan tool.

There is a simple Jumper procedure.

The details well defined below:-----


Before obtaining the codes make sure that:
-Battery voltage 11 volts or more.
-Throttle valve fully closed
-Transmission in neutral range.
-Accessories switched OFF.
-Engine at normal operating temperature.

One all this things are checked ok.

Then follow the procedure to retrieve error codes :----

-Turn the ignition switch ON. Do not start the engine.
-Using a jumper, connect terminals TE1 and E1 of the DLC 1
-Read the diagnostic trouble code as indicated by the number of flashes of
the Malfunction Indicator Lamp. (The Check Engine light will "blink" the codes. For example: blink, pause, blink, blink = 12) OR( Blink, Blink ,Pause and Blink is code 21).
In the same way just count the number of blinks and confirm the error code.

See the diagram shown below for jumper points:-----



This details will help.
Thanks.

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