How to Troubleshoot a 1994 Toyota Corolla
Troubleshooting the 1994 Toyota Corolla requires a person to make basic mechanical observations. Regular driving allows you to monitor your vehicle's performance and notice any changes. Discover Mechanical problems by learning engine functions and using the process of elimination to pinpoint the problem. The 1994 Toyota Corolla is a four-door passenger car with a 1.6 liter engine and seating for five passengers. The car was manufactured in a five-peed manual transmission and a three-speed automatic. The vehicle features power steering, air conditioning and a rear window defrost.
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Instructions
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Plug a diagnostic reader into the dash to test the sensors. The input for the reader is located on the bottom drivers' side of the dash. Allow the reader to communicate with the system and run diagnostic tests. Replace any bad sensors that are indicated on the reader.
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Turn the key to start the engine. If the engine does not start, attach jumper cables between your battery and the battery of a vehicle that has power. Start the other vehicle and let it run for several minutes. Then, start your vehicle. Replace the battery if the problem occurs repeatedly.
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Use the voltage meter to test the alternator. Attach the positive cable to the positive battery terminal and the negative cable to the negative battery terminal. Idle the vehicle and read the meter screen. If the reading is less than 14 volts, the alternator is not charging properly and must be replaced. The faulty alternator will put the battery through drain-charge cycles until it is ruined. The alternator commonly causes problems on the 1994 Corolla.
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Remove the two starter bolts with a socket wrench and have the starter tested at an auto shop. The bad starter will make a clicking sound when you turn the key and it is temporarily fixed by tapping it with a hammer. The starter is located on the drivers side of the engine compartment. It is a cylinder-shaped piece of metal that is removed by turning the two bolts counterclockwise with the socket wrench.
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Drive the vehicle to test the engine and the transmission. If the engine sputters and experiences power surges, the fuel pump may need to be replaced. If it the steering wheel feels stiff and it is difficult to steer, the power steering pump may need to be replaced. If the transmission grinds, skips gears and jolts while shifting, it must be serviced immediately. These are all problems best performed by a professional mechanic.
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Tips & Warnings
Change the oil on a regular basis to protect the engine from damage. Black smoke from the exhaust indicates a low oil level.
Make repairs as soon as the problem is diagnosed. Driving with a damaged engine may increase the extent of the damage and level of required repairs.
References
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