1. Connect the diagnostic equipment to the vehicle and begin a WDS or IDS session.
:NOTE
DTCs and snap shot data should be noted at all stages during the diagnosis. This information will be needed in the event further assistance isrequested from Jaguar Technical Helpline.
2.
DTCs and collect snap shot data.Note
:NOTE
Faults may be either "permanent" or "intermittent". Intermittent faults can be difficult to find but are usually caused by wiring or connectorissues. A "permanent" fault may indicate that a control module has internal damage. If internal damage is discovered, the module should bereplaced.
A fault may be determined to be either "permanent" or "intermittent" by using the diagnostic tool to clear the Diagnostic Trouble Code (DTC)and carrying out an ignition reset or completing a short drive cycle. A short drive cycle involves driving the vehicle in a straight line up to aspeed of 15 mph (24 kph).
3. Determine if a fault is "permanent" or "intermittent" as follows:
^ Clear the DTC.
^ Carry out an ignition reset.
^
If the fault immediately returns on the next ignition reset or short drive cycle, and if it is the only fault that returns, the fault is "permanent" andthe control module should be replaced.
:NOTE
Internal control module errors can be caused by corrupted sensor or Controller Area Network (CAN) information being fed into the controlmodule. A faulting sensor may be the cause of these errors but will typically log other DTCs in addition. It is necessary to investigate the causeof any other DTCs and fix the issues causing them before going any further. Resolving a problem causing other DTCs may also resolve the"internal control module error".
4. Resolve DTCs that are not flagged as an "internal control module error".
5. Verify if the DTC resolutions have cleared the "internal control module error" DTC.
:NOTE
Internal control module errors can be caused by poor or intermittent contact to power or ground. The integrity of the control module power andground connections should therefore be checked. Check for continuity and short circuits. Where possible, flex wires while checking to searchfor intermittent faults. "internal control module errors" are more likely to be caused by electrical "spikes" than by prolonged power/groundbreaks.
6. Check the integrity of the control module power and ground connections.
7. Check for continuity and short circuits while flexing wires, where possible, to search for intermittent faults.