Principles of Operation

Speed Control - VIN Range: G45704->G99999

Principles of Operation
There are two types of speed (cruise) control fitted, adaptive cruise control (ACC) and non-adaptive cruise control.

Inspection and verification
1. Verify the customer concern.
2. Confirm which, if any, warning lights and/or messages were displayed on the instrument cluster.

NOTE: For information on the messages displayed, refer to the owner handbook.

3. Visually inspect for obvious signs of mechanical or electrical damage.


Mechanical Electrical
Forward looking radar (FLR) Fuses
sensor levelling
Obstructions in the way of the Wiring harness
FLR sensor
Electrical connector(s)
Steering wheel switches
Brake/Clutch switches
Forward looking radar (FLR) sensor
Adaptive speed control (ACC) module
Engine control module (ECM)
Transmission control module (TCM)
Controller Area Network (CAN) circuits

4. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
5. If the cause is not visually evident use the Jaguar approved diagnostic system or a scan tool to retrieve the fault codes before proceeding to the DTC index or the symptom chart if no DTCs are set.

Forward looking radar (FLR) sensor levelling
An incorrectly aligned FLR sensor can cause incorrect system operation. Before starting any repair work on the ACC system, check the levelling of the FLR sensor. This is carried out in a similar way to the module levelling in previous systems. Speed Control Module Alignment