1 Engineering Tool Diagnostic Trouble Code Status Display For UDS

Description

The engineering tool currently displays 3 different statuses for diagnostic trouble codes (DTCs). The statuses are as fallows:

1.) Active An active DTC status is displayed when bit 0 in the status byte is set to one.

2.) Pending A pending DTC status is displayed when bit 2 is set and bit 4 is not set per the DC-10747 (UDS) specification.

3.) Stored A status of stored is displayed when bit 3 is set to one and bit 0 is set to zero.

Below is a simple breakdown of how the engineering tool decodes a DTC status. Please refer to DC-10747 (UDS) for a full list of all DTC statuses and descriptions.

b7 b6 b5 b4 b3 b2 b1 b0 b7 b6 b5 b4 b3 b2 b1 b0 DTC Bytes 1 - 3 Byte 4

Bit 0 = Active Bit 2 = Pending Bit 3 = Stored (only if Bit 0 is equal to 0)

Used for Freeze Frame data (See DC-10747 UDS for more information).