Electronic Engine Controls: Operation: Diagnostics

The Powertrain Control Module (PCM) stores each fault as a Diagnostic Trouble Code (DTC). The DTC and associated environmental and freeze frame data can be read using the Jaguar Land Rover (JLR) approved diagnostic equipment. The freeze frame data can vary depending on the fault.

Core freeze frame data for every DTC includes:

• Power mode
• Time
• Distance
• Startup battery voltage.

The JLR approved diagnostic equipment can also read the following:

• Real time data from each sensor.
• The adaption values currently being employed.
• The current fueling settings.
• The current ignition settings.
• The current idle speed settings.

Specific sets of data are linked to each DTC. The selected data set will give the most useful supporting data to diagnose the fault.

For additional information, refer to:

ELECTRONIC ENGINE CONTROLS  and the appropriate DTC Index