Fault Indication

The sensing and diagnostic module records the system's faults in two categories:
- Current faults.
- Historic faults, which are those that were detected in the past, but are no longer active.

The warning lamp:
- Indicates a fault as soon as it occurs.
- Stays ON, even if a fault is no longer active.

A scan tool connected to the data link connector (DLC):
- Reveals the fault codes.
- Receives serial data transmission through the terminal 13 of the DLC.
- Receives ground through the terminal 4 of the DLC.