On-Board Diagnostics: Introduction

WARNING: This page is about a different car, the 2003 Jaguar XJR, 2002 Jaguar XJR, and 2001 Jaguar XJR. However, it is still accessible from the selected car via links, so may be relevant.

This electronically controlled five-speed transmission system is unique to supercharged vehicles. The system is controlled by a transmission control module, which is located in the same housing as the engine control module.

The TCM processes input and output in both analogue and digital form, which may be summarized in four categories: Inputs, Outputs, CAN Inputs & CAN Outputs.

Fig 1: Identifying W5A 580 Transmission Inputs/Outputs

Courtesy of JAGUAR CARS, INC.

Fig 2: Identifying W5A Transmission CAN Inputs/CAN Outputs

Courtesy of JAGUAR CARS, INC.