Checking the engine: Notes

WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS OF NORTH AMERICA.

Ignition off
Disconnect system relay 2/14
Remove spark plugs.
Check the compression at wide open throttle (WOT).

In particular, check for uneven compression between the cylinders.

NOTE: Compression testing should always be carried out at wide open throttle (WOT) and with the engine at operating temperature. Diagnostic trouble codes (DTCs) ECM-24 and ECM-A3 will be stored because the system relay is disconnected.

Fig 2: Identifying Engine Compartment Integrated Relay/Fusebox
Courtesy of VOLVO CARS OF NORTH AMERICA.

Is the compression OK?

YES
FAULT NOT FOUND: Troubleshooting has been completed.
NO
Refer to Engine repairs