How to Troubleshoot a 1995 Oldsmobile Aurora Fuel System
- 1). Compile a set of resources by locating a list of General Motor's flash fault codes. You will not find them within the Oldsmobile Aurora's owner's manual. These codes can be printed off a website (see Resources), or you can consult a Haynes manual for this model of Oldsmobile.
- 2). Sit behind the Aurora's steering wheel and place the printed out flash fault codes in the navigator's seat. Look under the Aurora's steering column. You will found the automobile's assembly line data link, which is a hub of 12 pin-receiving slots.
- 3). Find the "A" and "B" slots on the ALDL. Both are in the top row, side by side, and next to each other. Place one end of a jumper wire into the "A" slot. Place the other into the "B."
- 4). Turn the Aurora's electrical system on. However, leave the engine off. Pick up a pen and a notepad.
- 5). Count how many times the check engine light flashes. These lights will be in a coded sequence of long and short flashes. The first flash is the longest,and the second is the shortest. For instance, General Motors "code 12" will be one flash followed by two flashes. All General Motors codes are made up of two numbers. After the second code is conveyed, there will be a pause before a new fault code sequence begins. Jot each code set down.
- 6). Consult the resources you collected in Step 1. Look up each code number and its corresponding definition. At the beginning of the entire process, you will see "code 12." You can safely ignore it. "Code 12" always begins the whole self-testing procedure.
- 7). Turn the Aurora's electrical system off. Pull the jumper wire from the ALDL's "A" and "B" slots. Open the hood, and troubleshoot the codes on the list. For example, "code 54" refers to a failure in an Exhaust Gas Redirection (EGR) circuit. "Code 36" refers to an error in the ignition system circuit. For every code you copied down, investigate not just the circuits or components referred to. Check the entire system around the circuit or component.
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