Thread: Diagnostic plug under panel near left drivers knee?

From memory on a 96 Disco,
The 14CUX Engine management has its own 5 pin plug behind the side drivers kick panel, the ABS may have it's own Blue 5 pin plug underneath the passenger seat in the storage box (you could look), or NAS or later 96 models, as it changed in this year, it did indeed get added to the OBDII plug.
The 16 pin OBDII connector down by the steering column (Left drivers knee)

Otherwise teh OBDII connector only provides access to the SRS Airbag and the 10AS alarm .

The Alarm is wired to pin 8 only with bi directional data and the SRS to pins 13 and 14 for data in and out. Interestingly if you follow the SRS pair of wires for about 6 inches you will see they go into a plug that fits into the original Pre OBDII connector version of the Airbag diagnostic connector.

This a bit of a screw up for pin 14 because the J1962 specification defined

Pins 7 and 15 for usage by the ISO 9141 communication protocol that was already starting to be implemented in Europe and later variated to ISO9141-2 / ISO /DIS 14230 and keyword protocol 2000

Pins 2 and 10 for the J1850 protocol pair (PWM & VPWM) used by Ford and GM at the time

Pins 6 and 14 for the CAN Bus protocol.

Pin 16 for 12 V permanent feed,
Pin 4 and 5 for ground

Since all 7 other pins were un allocated. its not like there were not spares, but i guess they wanted to use the same pins as they did on the P38 so they could use the same Grey OBDII diagnostic lead, but someone got them swapped round at design time and so they do use that lead but with an additional dongle that swaps em back.

If the ABS is wired to the OBDII connector it will use Pins 7 and 15 because at connection level, it is an old ISO9141 unit, However as stated the comms is different to and engine management and has absolutely no OBDII compliance.

are these only on a 96 or are they on a 95tdi