Compression Check

Compression Test
General Remarks

NOTE: Removing fuses and disconnecting electrical components causes the Powertrain Control Module (PCM) to log an error message. After the measurements have been carried out this error message should be cleared from memory by connecting to the Jaguar Approved Diagnostic System.

NOTE: Only check the compression pressure with the valves set to the prescribed clearance (if this can be adjusted).

The compression pressure should be checked with the engine at operating temperature.