- SNAP ON MODIS ULTRA CYLINDER DEACTIVATION DISABLE SERIAL
- SNAP ON MODIS ULTRA CYLINDER DEACTIVATION DISABLE CODE
- SNAP ON MODIS ULTRA CYLINDER DEACTIVATION DISABLE PC
SNAP ON MODIS ULTRA CYLINDER DEACTIVATION DISABLE PC
USB changed all this mess and opened the PC to one connector for all devices.
SNAP ON MODIS ULTRA CYLINDER DEACTIVATION DISABLE SERIAL
A good way to explain is with USB, it is a universal PC connector before USB there were serial ports of different sizes and shapes, your printer needed one type your mouse needed another. The term OBDII refers to the connector/interface. Does my car have OBDII?Ĭhances are if it is built after 1996 then yes. OBDII is the latest standard that incorporates access to all onboard systems in your car. Through the years OBD systems have become more sophisticated and now new cars can monitor brakes, airbags and now can even sense tire pressure.
SNAP ON MODIS ULTRA CYLINDER DEACTIVATION DISABLE CODE
If there are any problems, the system generates a fault code and will pinpoint the system needing an inspection. OBD means onboard diagnostics, it is a sophisticated digital computer with sensors in your car that is always checking and adjusting as you drive and this keeps your vehicle running in the most efficient and safest way. OBD is the connection to your car diagnostic system that is detailed below. You are maybe able to fix it yourself if it not a severe fault and save some bucks by not needing to go to the mechanic. Once you know the fault, you can repair or replace the parts causing the problem and turn off the dashboard light. The car computer stores the so-called fault code, so with the right tools, you or your mechanic can access the system and have some insight into the problem. It also illuminates the dashboard light, so the user knows something is not alright, this light can prevent you from passing inspections and can also be dangerous. Without the information, the computer then guesses what should be a good number to substitute for the sensor’s output and this allows your car to function almost the same. When this light is on, it means the PCM, powertrain or other control module is receiving some data that the system cannot recognize and the system doesn’t know what to do. If anything is wrong in the engine room, the Check Engine light will notify you but not really tell you what is wrong, this is also called the MIL, or malfunction indicator lamp.Īs we begin to spend more time at home during the virus, you have the oppourtunity to learn more things about your car, and even possibly fix issues yourself. That is until you have the red icon of death appear on your dashboard and need to get it fixed. It really is a perfect system that can keep a car running for years without a mechanic. A significant dip in oil pressure on one cylinder or another would suggest a leaking VLOM gasket.The days of going down to the garage for a tune-up is no longer necessary as sophisticated digital systems now self-corrects the fuel mixture and ignition timing at every crankshaft revolution. The trick is to monitor oil pressure at the same time, if possible. You should create a dead misfire as you go down the line.
But I'd be most interested in knowing what happens when you command the VLOM solenoids on and off at idle. You may have a bad VLOM? They fail in multiple ways. The ECM doesn't know why, only that the two didn't add up. For whatever reason, your Suburban isn't conforming to that ideal. What I got out of that is: The ECM has an idea of how the engine should be breathing in V4 mode. If the measured values are incorrect for V4 mode, the ECM will set DTC P3400, and will return to V8 mode operation. The actual measured values of the 3 sensors are then compared to the calculated values for V4 mode, stored in the ECM. The engine control module (ECM) determines the internal mechanical condition of the engine through the actual measured values of the mass airflow (MAF) sensor, the intake manifold absolute pressure (MAP) sensor, and the throttle position sensor. The Cylinder Deactivation System Performance diagnostic is a test of the internal mechanical condition of the engine, during operation in V4 mode. It's a performance code, not a circuit code, unfortunately. Please Log in or Create an account to join the conversation.
Fuel trims are fineĪ shop replaced both purge valves (canister & engine) & MAP sensorĪny idea how I can 100% verify a bad VLOM or rule it out and look for a sensor issue? O2 B1-S2 appears dead, flat line unless I snap the throttle.
Cylinder deactivation bank 1 trouble code:Īll deactivation solenoids will click when commanded by the scan toolĮCM C2 14 Orange wire does not pull down to 0v when solenoid 6 is activated but will click (cylinder 6 is bank 2, not bank 1?) and I have conflicting information regarding what solenoid number activated which cylinder (I don't have access to Mitchel/Shopkey/Alldata, etc).ĭisable history keeps pointing in different directions, so I have no idea what direction to go in.
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