Instruments - Description & Operation: Description: Diagnostics

A diagnostic socket allows the exchange of information between the instrument pack and T4 scan tool or other diagnostic tool. The diagnostic socket is located behind the centre console, in the passenger footwell.

The diagnostic socket is connected to the instrument pack on an ISO 9141 K Line. When the diagnostic mode is accessed the LCD displays "dIAg", which remains until the diagnostic mode is exited.

The instrument pack stores fault flags which can be retrieved using T4 scan tool or any diagnostic tool using Keyword 2000 protocol.

Each fault stores two flags. The first flag (fault log) indicates that a fault has occurred with that function. This flag can only be removed using a diagnostic tool.

The second flag (active fault) indicates that there is currently a fault with that function. This flag is only active while the fault condition exists. Removal of the fault condition will clear the active fault flag.