blackhat620
You Had to be There
Read the first half of this article here:
www.fordtruckfanatics.com/forum/showthread.php?t=1940
NOTE:
EOBD2 is Not a new version of EOBD.
Where EOBD stands for 'European On-Board Diagnostics', EOBD2 actually stands for 'Enhanced On-Board Diagnostics, Second Generation'. EOBD2 tends to refer to manufacturer-specific features available on some OBDII/EOBD tools to access additional parameters/information from a car, over and above the normal parameters and information available within the EOBD/OBDII standard.
EOBD2 features are normally highly manufacturer-specific, and will usually only be available for a certain car manufacturer, e.g. Ford.
There are, as such, no 'EOBD2 cars', i.e. cars that require an EOBD2 tool to access their diagnostics information. EOBD2 functionality might however allow more information to be extracted from an EOBD/OBDII compliant car.
Although Ford Motor Company implements the largest subset of the OBDII standard compared to any other manufacturer, the typical vehicle only supports 20 - 40 sensors and is limited to emissions power train. Using the enhanced Ford interface, a typical Ford vehicle will support 200 - 300 sensors within half a dozen systems; that's essential systems like ABS, airbags, GEM, etc.
OBD II Pending Codes are also referred to as “continuous monitor” and “maturing codes”. An intermittent fault will cause the computer to store a pending code in memory. If the fault does not recur within 40 warm-up cycles, the code will be cleared from memory. If the fault recurs a specific number of times, the code will then mature into a diagnostic trouble code (DTC) and the MIL or “check engine” light will turn on.
Freeze Frame data: When an emission-related fault occurs, the on-board computer records certain vehicle conditions. The information is a “snapshot” of the operating conditions at the time of the fault. This data can be overwritten by faults with a higher priority.
PID:
Parameter Identification Data is the real time data information from your vehicle. As the PCM monitors the vehicle, sensor data and the status of switches, solenoids and relays can be viewed in real time.
Antilock Brakes & Air Bags:
Most consumer scan tools will not retrieve Anti-Lock Brake (ABS) or Airbag (SRS) codes. These systems use separate computers that most consumer scan tools are not capable of communicating with. With the advent of CAN Bus technology, this problem should be alleviated.
The majority of this information was gathered from:
www.autoxray.com/
www.actron.com/index.php
www.autoenginuity.com/index.html
www.gendan.co.uk/article_5.html
www.fordtruckfanatics.com/forum/showthread.php?t=1940
NOTE:
EOBD2 is Not a new version of EOBD.
Where EOBD stands for 'European On-Board Diagnostics', EOBD2 actually stands for 'Enhanced On-Board Diagnostics, Second Generation'. EOBD2 tends to refer to manufacturer-specific features available on some OBDII/EOBD tools to access additional parameters/information from a car, over and above the normal parameters and information available within the EOBD/OBDII standard.
EOBD2 features are normally highly manufacturer-specific, and will usually only be available for a certain car manufacturer, e.g. Ford.
There are, as such, no 'EOBD2 cars', i.e. cars that require an EOBD2 tool to access their diagnostics information. EOBD2 functionality might however allow more information to be extracted from an EOBD/OBDII compliant car.
Although Ford Motor Company implements the largest subset of the OBDII standard compared to any other manufacturer, the typical vehicle only supports 20 - 40 sensors and is limited to emissions power train. Using the enhanced Ford interface, a typical Ford vehicle will support 200 - 300 sensors within half a dozen systems; that's essential systems like ABS, airbags, GEM, etc.
OBD II Pending Codes are also referred to as “continuous monitor” and “maturing codes”. An intermittent fault will cause the computer to store a pending code in memory. If the fault does not recur within 40 warm-up cycles, the code will be cleared from memory. If the fault recurs a specific number of times, the code will then mature into a diagnostic trouble code (DTC) and the MIL or “check engine” light will turn on.
Freeze Frame data: When an emission-related fault occurs, the on-board computer records certain vehicle conditions. The information is a “snapshot” of the operating conditions at the time of the fault. This data can be overwritten by faults with a higher priority.
PID:
Parameter Identification Data is the real time data information from your vehicle. As the PCM monitors the vehicle, sensor data and the status of switches, solenoids and relays can be viewed in real time.
Antilock Brakes & Air Bags:
Most consumer scan tools will not retrieve Anti-Lock Brake (ABS) or Airbag (SRS) codes. These systems use separate computers that most consumer scan tools are not capable of communicating with. With the advent of CAN Bus technology, this problem should be alleviated.
The majority of this information was gathered from:
www.autoxray.com/
www.actron.com/index.php
www.autoenginuity.com/index.html
www.gendan.co.uk/article_5.html
