Ways to Test an Automobile Laptop or computer 1Compile a resource list prior to operating diagnostics in your automobile. Look for two groups of OBD-II codes. Your OBD-II scanner's operations manual will function an appendix or chapter on trouble codes; it lists generic trouble codes applied by all post-1996 automobiles.2Locate a second set of OBD-II codes. These codes are determined by your vehicle's brand. Each and every manufacturer utilizes a separate set of supplemental codes. Some manufacturers are grouped together into corporate households.
By way of example, Common Motors encompasses Chevrolets, Buicks, and Oldsmobile. Chrysler covers Jeep, Dodge, and Chrysler brands. Discover these codes on the web (See Resources).3Open the driver's side door. Spot your code resources on top rated with the dashboard. Obtain the 16-prong receiving-plug outlet located within the leg-space region This port is called a Data Link Connection; its location will differ by brand, model, and year. It truly is generally uncovered Auto tools, and towards the decrease left or the right with the steering column. DLC locators are accessible on the internet (See Resources).4Connect your OBD-II scanner to its diagnostic cable. Insert the cable's 16-prong plug in to the DLC outlet. Switch the scanner on, if it truly is not a brand that options auto-activation.5Put your key into your automobile's ignition and turn to the "On" position.
Leave the engine off. This brings up your automobile's electrical program, and powers the vehicle's PCM, ECM or ECU. For some OBD-II devices, the electrical method may possibly not be adequate. Some handheld scanners need a operating engine.6Look at your scanner's display screen. Verify that your device is interfaced together with the automobile's PCM, ECM or ECU. Check with your manual, and stick to the precise guidelines on the way to enter a "scan" command. The process will vary by device.7Look at your scanner's display, and scroll via the alpha-numeric codes. Write down all the codes that are classified as "trouble." Your scanner's manual explains the distinction amongst "trouble" and "pending" codes. Not all of those codes deal with your automobile's pc.8Retrieve your coding resources off the major with the dashboard. Appear up all the relevant coding definitions; copy them subsequent towards the alpha-numeric numbers on your list Car Diagnostic Tools. Spot asterisks subsequent to every thing computer system related.9Take your automobile to a mechanic when you confirm any troubles along with your vehicle's personal computer. PCM, ECM or ECU modules are one particular full unit. Fixing or repairing commonly consists of replacing, restarting or reprogramming them. The laptop or computer module may possibly be obsolete on older cars.
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