AutomotiveCars › Tips to Test the OBD Check Engine Light for a C1500 Chevy yourself

Tips to Test the OBD Check Engine Light for a C1500 Chevy yourself

As we know that style of diagnostic procedure stopped in 1996, when the Environmental Protection Agency (EPA) standardized the version two of On-Board Diagnostics (OBD 2). Checking an engine made after 1996 requires an OBD scanner. If your Chevrolet C1500 has the ability to self test, then it was manufactured before General Motors started to phase in OBD 2 coding. Although the diagnostic system is outdated, you can still test the Chevrolet C1500 by yourself.
You'll Need Paper clip for this job.
Print out Chevrolet's OBD 1 check engine light flash codes. You can search them over the Internet; the C1500's manual does not include them. If you own a Haynes Repair Manual for your model year, you can find descriptions for Chevy's flash codes in the engine-related chapters. Put the manual or the information you have printed in the C1500's navigator seat.
Craft a paper clip into a skinny "U" shape and place both ends into the "A" and "B" ports on the C1500's Assembly Line Data Link (ALDL). The ALDL is directly under the steering wheel, and the "A" and "B" ports are the last two in the upper row, on the far right.
Turn the C1500 into self testing mode. To do this, plug the C1500's key into the ignition and turn to the "On" position. Leave the C1500's engine off and do not power on.
Count how many times the C1500's check engine light flashes and look on how long the flashes last. Each flash code is different. For instance, GM flash code 24 consists of two long flash followed by four pulse-like flashes. GM flash code 36 is three long flashes with six pulse-like flashes. Write these down on paper.
Look up the resources you left in the C1500's navigator seat. The flash code definitions supply brief explanations of engine problems. Reread the code definitions and descriptions. Fix the problems if you can. If not, ask for a mechanic to repair the problem. I am glad to communicate with you, if you are interested in OBD 2 scanner.
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