In diagnosing a faulty PCM, the presence of powertrain error codes does not automatically pinpoint a problem with the unit itself. Test your battery voltage across the terminals using a multimeter or any other instrument that does the job. With the Jeep Cherokee in particular, owners have come across issues they've encountered with it. Engine Start Failure. Keep in mind that a slipping belt is not always defective, it can slip due to a number of reasons, including due to a bad tensioner pulley or any other pulley. For instance, to resolve 2004 Jeep Grand Cherokee PCM problems, you will need to access the cowl panel in the engine compartment's right or rear side. That may not be the case with a faulty ground cable since the solenoid will get insufficient voltage. Ensure all the components are in well-working order. If everything fails, then take your Cherokee to a nearby garage or call a mechanic. Check the refrigerant for any leakage and sealed with the right replacement component. Before you think of replacing the entire fuel pump unit, check the ground wire first to ensure it is not the culprit. The headlights were working and then they weren't. How to fix bad ground problems in Cherokee? If it's not working, you won't be able to power any of those accessories.
If it is stuck in place and being trouble for you to detach, spray the connection with the WD-40 and let it sit for a while. Is a Jeep Cherokee PCM interchangeable? Now if the antenna cable and the wire harness from the ground are damaged, the stereo either stops operating or starts creating horrible sounds. That can be a frustrating experience, especially if it is your first time experiencing this problem. At times, the Cherokee would stall and refuse to start. What's worse was that once it started malfunctioning, it wouldn't stop. The problem seems to effect all electrical functions of the vehicle simultaniuoulsy, however, the vehicle does not quit running.
Expectedly, a Jeep Cherokee PCM repair would be impossible as sudden PCM failures due to submerging your Jeep in water or mud would usually warrant a PCM replacement. The mechanics should be able to diagnose this problem and fix it. Here are steps on how to reset your Jeep Cherokee PCM: - Disconnect the positive battery terminal and touch it to the ground for 30 seconds to discharge the PCM capacitors, maintaining the PCM's adaptive memory. If you discover white deposits or silvery-green deposits, but no further cracks or damage, you may not have to replace the battery or the alternator, just clean the battery terminals.
You should do that with the ignition key in an off position. There are many reasons, including a ground problem when a jeep Cherokee is not starting. Most drivers had to wait months on end for Jeep to recall their vehicles. Symptom: Slow engine crank sound. So it is better to measure the voltage of the battery with a multimeter.
So in mu case more than half of the wires were severed over time cause sporadic connections all throughout my jeep. If so, perform diagnostic procedures based on the exact error code you're reading. But if there is power, signs of bad wiring between the fuse and the radio. Bad Ground Wire Symptoms On Jeep Grand Cherokee. If the alternator isn't charging the battery properly, the engine may crank very slowly and may not start. There are several reasons why the jeep is refusing to start. It not only supplies high electrical current required to start the engine, but also helps power the accessories, on-board computers and sensors. I pulled out the center console and found that the grounding point for the BCM (body control module) was missing the nut that secured it to the post. What systems rely on the proper functioning of the ground strap? Clean all the other connecting plugs and cables with a simple brush.
Yes it could be grounds. The PCM may display random error codes (also known as OBDII codes), even if nothing is wrong with your Jeep. Jeep Cherokee is one of the most capable compact crossover SUVs for families on the go. These three symptoms indicate a bad PCM-relay: - You get no power when you insert the key. Due to a bad ground, there creates an open circuit on the battery terminal which leads to it being overcharged. Dimming Or Flickering Lights. The low battery voltage will lead to problems such as the car losing its usual speed. But before replacing the battery, you should rule out any other problems that may cause the dead battery symptoms, e. g. bad alternator, loose battery connection, or poor ground connection. 6 volts or more when fully charged. The best way to do this is using a power probe, but you can also use an ordinary probe light. That means when you turn the ignition key, the engine won't start or crank and you may not hear any clicking sound from the engine.
So through many mechanics and idiots i came across a guy who showed me where all the problems lie. I thought at first it could be a bad ground, but the flickering dome light (only with the engine running) and the voltmeter spiking have me wondering if it's something like the voltage regulator. Even if everything seems to be working well, you should be inspecting the ground wire every now and then. Cherokee comes with a potent engine that makes it excellent for off-road experiences. Reasons that your Check Engine light turning on include emissions problems, faulty O2 sensors, and problems with the PCM. Take the siren off the connector, wrap the connector in rubber glove and tape it. To avoid these problems, it will be wiser to go through a proper check of the quality of the ground connection in your Jeep. I purchase a Jeep grand Cherokee 2017 Laredo series, but unfortunately my wife had an accident in the garage and the airbags blow off. Does fuel pump replacement have something to do with a loose ground wire? A few things may cause your Jeep to stall—for instance: - a vacuum leak, - malfunctioning torque, - a worn fuel pump, - or a TIPM. Actually, all the problems are very basic, and you may fix all of them if you are brave enough to test this cable yourself. It powers the starter motor that turns over the engine. For the engine to start, ignition coils should receive the correct voltage.
An electrical fault between the battery and solenoid will give your Jeep Grand Cherokee a problem at the start. Like the other parts, you have to find out the actual cause by checking all the wires from beginning to ending. A defective PCM can also make your vehicle sluggish and troublesome when suddenly accelerating or driving uphill. You experience a massive battery drain or a dead battery. Remove the defective strap.
Phase #4- A well-working ground cable will give the reading closest to Zero. The common cause of faulty ground straps is high temperature or heat. What happens if I don't fix the bad ground? Meanwhile, another driver said the Cherokee started switching off when idling.
If that doesn't prove well, verify the fuse box, electrical connectors, and the speedometer sensor. Next you can unplug the red positive terminal cable. After getting a new battery, alternator and new 4 ga power and ground cables i still had the problem. Also, check for the power at the fuse. If your vehicle is new and has all the legal papers, talk to the manufacturer or dealer to have a quick solution. The backup sensor alarm starts bleeping unexpectedly; - The system can't sense cars or objects behind; - You have to turn off the engine in order to turn off the backup sensor alarm. Therefore it is recommended to keep the engine of the donor vehicle off when jump starting your Cherokee.
In most cases, a broken compressor or a bad blower motor is the core reason for the bad AC system. Connect the positive terminal of the battery first. If the voltage drops too much, below 10 volts, your battery doesn't have enough charge to start the engine. They may also clean your clogged fuel injectors using a cleaning liquid. Every time you turn the vehicle's key and hear a dying sound from the jeep's inside without starting. Aftermarket electrical systems. The Powertrain Control Module (PCM) is a computer that controls your vehicle's essential functions, such as changing gears and anti-lock brakes. Other performance issues include your Jeep running poorly and having a wide variety of electrical problems.
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