Maintaining your grand Cherokee regularly can eliminate problems before you begin. However, before you start troubleshooting, you should make sure that you have just changed the transmission oil and fluid. Also, make sure you’ve flushed the radiator and added the new coolant. You should also check the filter as it can keep the engine running properly. The following are some tips you can take to troubleshoot your Grand Cherokee.
The first thing to do is start the engine and also check the dash cluster for an unusual reading. Look for incorrect battery output, operating temperature, and oil pressure readings. If the reading shows a different result than the norm, it means that there is something wrong.
Next, retrieve the error code from your Jeep’s computer. Insert your ignition key and turn it on. Try not to start the engine. Turn the key to the on and off position alternately and check the “check engine” or light for flashing codes. Normally, the light flashes a certain number of times to indicate the first number of the two-digit code and at a certain time to indicate the second digit. Then record the code to verify the meaning in the owner’s manual.
The next thing to do is test the alternator and battery for weak voltage. However, you must make sure that the engine is cold. You can start it by connecting the voltmeter to the negative and positive terminals. The tester will measure the voltage across your alternator and then refer to your owner’s manual for the proper voltage output.
The next thing to do is check the malfunction by running the engine. If you notice that your Jeep malfunctions at a certain speed, it indicates a problem. Look for broken straps, disconnected cables, and also broken or flattened hoses.
Next, check the spark plugs for spark. Disconnect the spark plug wires and start the engine in a dark area such as a garage. Instead, you can also light it at night to search for the spark by using an arc. If it doesn’t work, you can push the tester onto the spark plug. Then test the engine. The flashing light bulb indicates that the spark plug may function properly.
The last thing to do is check the fuel pressure. Attach a fuel gauge to test the port on the fuel rail. Then start the engine and look at the face of the gauge. To find the proper pressure for your Grand Cherokee, you can refer to your owner’s manual.
