Woody Su

Tips to use OBD 2 scanner to diagnose your Cadillac Car

Since 1996, Cadillac uses the second version of On-Board Diagnostic fault codes system, also known as OBD 2. The Cadillac's computer runs a series of routine checks and monitors the health of the system such as engine, sensors and so on. 

Since 1996, Cadillac uses the second version of On-Board Diagnostic fault codes system, also known as OBD 2. The Cadillac's computer runs a series of routine checks and monitors the health of the system such as engine, sensors and so on. When a malfunction has occurred the computer will send a fault code and activate a warning light on the instrument panel. Cadillac before 1996 uses an OBD I coding. The car can also implement a self diagnostic if you use a jumper wire to connect the self-test ports under the hood.

You'll need OBD 2 code reader for this task.

Plug your key into the Cadillac's ignition but do not sit in the driver's seat. Leave the key unturned. Leave your scanner's user manual in the driver's seat.

Find out the data-link-connection outlet, it usually locate under the instrument panel; location relies on the model of Cadillac. A 2008 CTS has its DLC port to the far right of the steering wheel's underside. A 1999 Catera features a DLC right under the steering wheel.

Link the OBD 2 scanner's cable to the DLC outlet. The cable features a 16-pin plug that will fit the DLC's 16 receptors.

Turn the key in the Cadillac's ignition to power the electrical system. But do not launch the engine.

Look at your scanner; a diagnostic trouble code should be displayed on the screen. Some scanners do not automatically power themselves on when they sense a connection to a diagnostic system. If you own one type of these scanners, press the power button. The fault code will appear in several seconds.

Look up the OBD 2 scanner's user manual. It will include the diagnosis of a problem and meaning of generic fault codes. Cadillac has supplemental and extra trouble codes unique to its models. Your user's manual will likely not include these codes, and they may not be in the Cadillac's user manual. There are free resources online that list manufacturer trouble codes, you can search for more detail online by yourself. For more information, you can search for online.

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