Citroen DS5 - Location of the OBD Port

When connected to the central diagnostic socket, the diagnostic tools enable the following operations to be performed :

  • Reading and exclusion of fault codes
  • Reading parameters
  • Test of actuators and inputs
  • Downloading and configuring of ECUs


The diagnostic socket is installed in the storage compartment under the centre console armrest. This diagnostic socket is concealed by a plastic cover, which you have to remove to gain access.
|Pin number|Allocation of tracks of connector|
| — | — | — |
|1|Ignition positive|
|2|Track not connected|
|3|Line CAN DIAG High|
|4|Body earth|
|5|Electronic earth|
|6|Line CAN IS High ISO bus|
|7|Line K diagnosis (Engine management - Automatic gearbox - Additional heating)|
|8|Line CAN DIAG Low|
|9|Track not connected|
|10|Track not connected|
|11|Track not connected|
|12|Line K4 diagnosis (Stability control - Hydraulic suspension)|
|13|Line K diagnosis - BCM|
|14|Line CAN IS Low ISO bus|
|15|Track not connected|
|16|Battery +|