Is the ignition switch part of the PCM?

Is the ignition switch part of the PCM?

The ignition switch now talks to the body control module (BCM) and it’s the BCM that initiates one of two relays. The second relay, the more important of the two, is controlled by the powertrain control module (PCM).

How does the ignition switch work on a GM car?

The ignition switch now talks to the body control module (BCM) and it’s the BCM that initiates one of two relays. The second relay, the more important of the two, is controlled by the powertrain control module (PCM). And it only operates the starter relay after it’s satisfied that the correct key is in the ignition.

Can a check engine light be an ECU problem?

There are cases, however, where the ECU illuminates a Check Engine Light mistakenly, or when there is no issue present. Scanning the computer for trouble codes can help reveal if the issue is with the ECU, or elsewhere on the vehicle. 2. Engine stalling or misfiring

How does the engine control module ( ECM ) work?

The ECM takes the information from the engine’s various sensors, and uses that information to calculate and tune engine spark and fuel for maximum power and efficiency. The ECM plays a crucial role in newer vehicles, where many (if not all) of the essential functions of the car are controlled by the ECM.

When do you need to replace the ECM power relay?

If there is no power when the key is inserted, the engine will not start, or the battery is dead, you may need to replace the ECM power relay. 1. No power when the key is inserted 2. Engine will not start 3. Battery drain or dead battery Average rating from 130,153 customers who received a Vehicle Engine Electrical Inspection.

Can a GM ignition control module be used?

The ignition control module (ICM) and ignition coil tests in this article assume that your vehicle is Cranking but NOT STARTING due to a NO SPARK Condition. If you’re GM car or truck starts and runs, this article will not help you.

Where is the ECU fuse on a 2005 GMC?

Locate the fuse panel cover on the underside of the driver’s side dashboard. Pull down on it with your fingers to open it. Look at the diagram on the fuse panel cover and locate the Electronic Control Unit (ECU) fuse. Take the fuse puller out of the panel and pull out this fuse.

How to reset the engine control module ( ECU )?

The 2 most common ways to reset your car computer is by either unplugging the battery or by resetting the fuse related to the engine control module Will disconnecting battery reset ECU? Disconnect the battery and Switch the ignition key to the on position for about 15 minutes should reset the ECU

The ignition switch now talks to the body control module (BCM) and it’s the BCM that initiates one of two relays. The second relay, the more important of the two, is controlled by the powertrain control module (PCM).

What should I do if my PCM is not working?

The reason this is important is that low voltage can cause certain sensors to fail, depriving your PCM of the input it needs to make correct adjustments. If your battery is fully charged and there’s no visible rust, your next step will be to plug an OBD or OBD II code scanner into your vehicle and see if the PCM is producing any OBD error codes.

When is it time to check your PCM?

For example, poorly-inflated tires can cause a drop in gas mileage, and hard starting can be caused by a weak battery or failing starter. But if you’re experiencing two or more symptoms with no other obvious cause, it’s a good idea to check your PCM.

How to test a PCM in a car?

How to Test a PCM. 1 Step 1: Visual Inspection. Now, before you start doing any surgery on your car, the first thing to do is to check for rust or a disconnected wire. 2 Step 2: Check Your Battery. 3 Step 3: Code Scanning. 4 Step 4: Inspect Wiring and Sensors. 5 Step 5: Try a Replacement.

What does an open circuit on a PCM relay mean?

An open circuit will result in the code P0685, which signifies a defective PCM power supply relay, a low system voltage, damaged or disconnected connectors, including battery terminals, a defective ignition switch, and a failed PCM or control module.

What is the function of the Powertrain Control Module?

In most cars, it has to monitor any other functions related to the engine and transmission systems. Also, in some vehicles, the powertrain control module might have to operate the traction control system and the anti-lock brake system. The anti-lock brake system is designed to prevent your car from skidding.

Is the GM body control module programmed to your Vin?

This listing is for part number 22860591 BCM that is programmed/flashed for your vehicle with the newest updates from gm using your vin to match your vehicle. After you purchase the BCM you will need to provide us with your vin so we can program the BCM before we ship it to you.

Do you need a PCM for a GM car?

Depending on the year, model and engine of your GM vehicle, your starting system may be less complicated or use only some of the components shown here. For example, earlier anti-theft systems didn’t communicate the same way with the PCM. The bottom line is you MUST get the wiring diagram for your particular vehicle.

What to do if your Pontiac Aztek ignition switch breaks?

Check first if the key is all the way in. If it is, try to turn your steering wheel left and right while turning the key hard. Just make sure, however, to only turn the key with your hands as using any tool to do this can cause the key or the ignition switch to break. If this method still doesn’t work, take your Aztek to a repair shop.

What are the options for the Pontiac Aztek?

The latest Astek is offered in three option packes: the base, mid-, and top-level package. The base offers air conditioning, power windows and door locks and a CD player while the mid offers the additional cruise control, carpeted floor mats, multiple cargo tie-downs and storage nets and a removable console cooler.

Why does my Pontiac Aztek not start up?

Holding the key in the START for 15 seconds or more at a time can drain your car’s battery sooner than expected. Also, the excessive heat that such action generates won’t do your car any good; it will just damage the starter motor. If, at first try, your Aztek doesn’t start in 10 seconds, wait for about 15 seconds before trying it again.

What kind of customer satisfaction does the Pontiac Aztek have?

For 2011, the Aztek was among the vehicles in its class to receive the highest Customer Satisfaction Index. It also bagged the “Most Appealing Entry Sport Utility Vehicle” award from J.D. Power and Associates. In fact, Pontiac Aztek scored second highest, if not highest, in all the APEAL component measures, except for exterior styling.