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The car's computer, known as the Engine Control Unit (ECU), runs the car but also watches critical values and tables
while the car is running. This system is known as the On-Board Diagnostic (OBD) system. Version 1.0, as known
as OBDI, came out back in the late 1980's and it helps to lower emissions and maintain car drivability. Version
2.0, or as refered to OBDII, was installed and standardized by the government for the 1996 model year,
to have better programming to lower emissions again and to have the system be more strict on failing parts / values.
1.) Locate the OBD serial port, on the dash above the cigarette
lighter and below the heating / venting / air conditioning controls. Gently remove the dash trim piece covering up the
port.
2.) Turn the ignition to the ON position, and plug in the code reader into the OBD serial
port.
3.) Depending on model of code reader, follow the instruction outlined in the owners manual
of the scanner, and determine the codes the ECU has stored.
4.) Record them and clear the OBD sysrtem if desired.
5.) Unplug the scanner and re-install the serial port cover; remove key from ignition.
- Average Time: 5 minutes
- Scheduled
Maintenance: when Check Engine Light is on
- Price of Materials:
generic OBDII scanner ~ $50.00+
or VAG-COM scanner ~ $75.00+
- Written by Erik Melander
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The Check Engine Light (CEL), shown above, will light up on the instrument
panel if OBD system notices a problem with the vehicle's emission controls or drivability. The issue should be
taken care of promptly, but it is acceptable to drive the vehicle when needed. If the CEL begins to flash, that
means there is a serious problem with the powertrain and the problem should be resolved as soon as possible. If the
vehicle is driven often with a flashing CEL, damage will be done to the catalytic convertor and emissions system.
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