This information refers to Domestic and Export calibration
packages. Use the diagnostic trouble code (DTCs) that only apply to your specific
regular production option (RPO). Each DTC is directly related to a diagnostic
test. The DTC sets based upon the DTCs individual running and setting
criteria.
The following are the types of DTCs and their code characteristics:
Type A
| • | Requests illumination of the malfunction indicator lamp (MIL)
on the first trip with a fail |
| • | Stores a History DTC on the first trip with a fail |
| • | Stores a Freeze Frame on the first trip with a fail |
| • | Stores a Failure Record |
| • | Updates the Failure Record the first time the test fails each
ignition cycle |
Type B
| • | The code is enabled after the first trip with a fail. |
| • | The code is disabled if the second consecutive trip passes. |
| • | Requests illumination of the MIL on the second consecutive trip
with a fail |
| • | Stores a History DTC on the second consecutive trip with a fail |
| • | Stores a Freeze Frame on the second consecutive trip with a fail |
| • | Stores a Failure Record when the first test fails |
| • | Updates the Failure Record the first time the test fails each
ignition cycle |
Type C1
| • | Requests illumination of the service lamp (not the MIL), or the
service message on the first trip with a fail |
| • | Stores a History DTC on the first trip with a fail |
| • | Does not store a Freeze Frame |
| • | Stores a Failure Record when the test fails |
| • | Updates the Failure Record the first time the test fails each
ignition cycle |
Type C0
| • | Does not request illumination of any lamps |
| • | Stores a History DTC on the first trip with a fail |
| • | Does not store a Freeze Frame |
| • | Stores a Failure Record when the test fails |
| • | Updates the Failure Record the first time the test fails each
ignition cycle |
Type X
| • | Diagnostics that are coded in the software, but will not run for
non-OBD II export vehicles |
| • | Some domestic vehicles use DTCs. |
| • | Even though codes are not stored, the DTC Type Table can still
be used as a resource when diagnosing problems with systems that are associated
with the type X DTCs. |
If a system is malfunctioning and the associated DTC has been disabled,
it may be beneficial to use the diagnostic table as a guide to aid
in diagnosis. Many of the DTC tables include a functional check of the
system that may pinpoint a problem. However, it is important to
remember that the DTC tables are specifically designed for use only
when a DTC is set. Therefore, a thorough understanding of the normal
operation of the system being diagnosed is necessary and use of
the tables for this purpose is at the discretion of the technician.
