If you own a Jeep Cherokee most especially jeeps, one place or the other, you will surely encounter starting problems.
In this blog, however, we will be looking at a cheap and simple repair that can help you avoid spending hundreds of dollars on repairs.
With a few hundred dollars worth of cheap components, you can solve a common problem that would otherwise require a complete replacement of the PCM which is quite expensive.
Identifying the Problem
It was painful when I watched my wife’s Jeep Grand Cherokee 2013 as it had trouble initially starting. All it would do would be cranking the engine quite vigorously but not a single sign of beating.
This circumstance can be very annoying more so when one has to travel from one place to another.
To make things worse, I found out about a simple fix that I could do for $10 when 800 dollars was too unreasonable to pay for a new PCM replacement.
Understanding the PCM
The Powertrain Control Module (PCM) plays an essential role in operating the engine on the vehicle.
In the dreadful event it fails, it can render the engine unstartable. Various symptoms can indicate a PCM issue, like when the engine tries to start but cranks without igniting.
In my particular instance, though the PCM is indeed the suspected cause, I did not use that option and instead looked for something else.
Gathering Your Supplies
To execute this fix, you will have to proceed to an automotive retailer’s shop.
So here’s what to look for:
- Two fuse taps A couple of fuses.
These items are quite cheap but quite important in your home remedy fix. Be sure to select the appropriate fuse taps specifically designed for your car model.
1- Locating the PCM
When completed gathering the required materials, go and open the hood of your jeep.
You will find the PCM on the left side, which may also be called a TIPM (Totally Integrated Power Module). That is where everything takes place.
2- Checking the Fuses
If you are going to make any modifications, plan for any alterations, and verify any requisite fuses beforehand. Beware as the fuse box schematic is likely to be incorrect.
For example, the fuse that is marked as a “lift pump” may not refer to the electrical fuel pump in a petrol-powered engine.
Rather, it is important to concentrate on the pertinent fuses that are responsible for the fuel system.
3- Testing for Power
Having the test light by you, switch the ignition key to the ‘on’ position. Proceed to check the voltage presence at the fuses related to the fuel pump.
You should find:
- Fuse number 25 is looking after the electronic fuel balance pump.
- Fuse number 7 gives power to the auxiliary when it is switched on.
When working in a live circuit, ensure that your test light is working properly and that it comes on when in contact with the power supply.
4- Implementing the Fix
If you’re sure that the faulty part is the PCM along with the fuel pump circuit, then you have identified the source of the problem.
Now it is time to implement the solution.
Here’s how:
- Two fuse taps were purchased from the store.
- Using one fuse tap, cut its butt connector and connect it to a different fuse tap.
- Slide the fuses into the fuses into the taps.
- The first tap goes into fuse number 25 which is for the electronic fuel pump.
- The second tap goes into fuse number 7 which, as above, is about switched power.
This setup lets the fuel pump get electricity when the key is turned on.
So there is no reason to have it powered all the time such as an instance where it will be able to flatten out your battery.
5- Final Testing
Now switching off involves turning on the key and the fuel pump to cast off some fuel into the engine and activate it has already been done.
All in all, initially the Ford should have no issues starting up assuming everything is working as intended.
Doing so helps you avoid the high installation charges that usually come with having to replace the module.
Benefits of This Solution
The most remarkable benefit of this DIY solution is the cost savings.
Instead of spending upwards of close to $800 in procuring another PCM and money for the service, you only used about $10 for the spare parts.
This alternative is cost-effective but is also an interesting method to gain insight into the electrical systems of your vehicle.
Conclusion
In conclusion, everyone fears having to deal with vehicle problems, but with some creativity, obstacles can be overcome.
Bear this quick fix in mind if you’re faced with similar circumstances with your Jeep or other Chrysler products.
It’s a great illustration of the fact that the best solution is the simplest one which saves us both time and money in the long run.
FAQs
What are the symptoms of a bad PCM?
A malfunctioning Powertrain Control Module (PCM) may produce several signs. For starters, you may begin to display signs of bad engine performance.
This includes rough idling, stalling, or loss of enhanced acceleration. Your vehicle is also likely to have erratic changing of the drives or struggles changing gears.
Moreover, the check engine light is likely to come on frequently, among many others. You may also notice abnormal fuel consumption either too much or too little.
Another sign includes the car not starting properly or becoming intermittent during starting.
What are the most common side effects of PCM?
Paracetamol (PCM) does not generally pose any dangers when it is adhered to. But it has side effects like other substances except for the hard drugs.
Most commonly these include nausea and upset stomach. Some individuals may be hypersensitive and experience rashes or itching.
Liver failure is very serious and may occur with highly elevated dosages. Symptoms of an overdose are; confusion, jaundice, and abdominal pain.
On rare occasions, it may cause blood disorders and depletion of white blood cells which results in leukopenia. Chronic use can heighten the chances of renal problems.
How do you know if your Jeep PCM is bad?
To find out if your Jeep’s PCM (Powertrain Control Module) is bad, observe the following abnormalities. Look out for warning lights like the Check Engine Light which stays on.
Also, abnormal engine actions like getting stalled or having an inability to accelerate are some signs to look out for.
Furthermore, pay close attention to random and inconsistent mechanisms of changing gears in an automatic gearbox.
If the jeep doesn’t come on or there is no power at all, it can be traced to the PCM. Doing so (reading DTCs/Diagnostic trouble codes) may help.
Such codes include failure of sensors or communication codes.
What does a Jeep PCM control?
The Jeep Powertrain Control Module (PCM) is responsible for managing the engine and transmission.
It gathers the following inputs from the engine: The temperature, the throttle position, and the speed of the car. The PCM regulates fuel supply and ignition according to the inputs and fuels best modulations.
The shifting patterns of the transmission under the control of the PCM are also important for driving and reducing fuel consumption.
It also engages with other systems such as the anti-lock brake system (ABS) as well as the traction control.
Where there is a fault development, the PCM sends out diagnostic trouble codes (DTCs) that give a direction on repair.
How is PCM diagnosed?
The degree of cutaneous involvement with the involvement of primary cutaneous melanoma (PCM) has relied on a clinical examination and also histopathological evaluation.
A dermatology specialist looks for abnormal moles and definite skin lesions. Important characteristics are asymmetry, irregular edges, various colors, big sizes, and change over time.
Most commonly, a biopsy is performed if the lesion has characteristics of one that is dangerous.
Involves cauterization that stays part or the entire body portion of the body, the lesion that is considered to be dangerous and sent for laboratory evaluation.
Consequently, the pathologists examine a laboratory sample of the tumor removed from the body to look for malignant cells in the tissue.
If the melting process has progressed and infiltrated deeper layers, special types of research may be carried out to determine the stage.
What are the most common side effects of PCM?
The most serious side effects of PCM (paracetamol) are the ones commonly associated with nausea and also vomiting of the elbow.
Some people can complain of pain or tenderness in the abdomen. Rashes, or even itching, may appear as side effects of allergy in rare cases.
Long-term use or overdose can result in liver damage, manifesting as jaundice or dark urine. Headaches and fatigue are also noted in some cases.
While most people tolerate PCM well, it’s important to follow dosage guidelines. Overuse can increase the risk of serious complications.