Ignition system: Notes

WARNING: This page is about a different variant/trim than selected.

Fig 1: Identifying Compression Testing

Courtesy of VOLVO CARS OF NORTH AMERICA.

WARNING: The ignition system works with high ignition tension and dangerous voltage in both low and high tension circuits. There are dangerously high voltages throughout the ignition system including the connectors etc.

Measure the compression with the engine at operating temperature and wide open throttle (WOT)

Normal value B5204, B5254, B5252 MPa 1.3-1.5

Normal value B5234T MPa 1.1-1.3

NOTE: Engine at operating temperature, wide open throttle (WOT) and starter motor turning at 4.2 - 5.0 r/s (250 - 300 rpm).