Engine Compression: Notes
Check engine compression with engine at cranking speed with battery fully charged, engine at normal operating temperature, electrical connector disconnected at ignition coil if ignition coil is not removed for access to spark plugs, all spark plugs removed and throttle wide open.
WARNING:
On Prius, read service precautions before proceeding with service procedure. See SERVICE PRECAUTIONS .
NOTE:
On Prius, when checking engine compression, connect Toyota hand-held tester to DLC3 located below driver's side of instrument panel and follow scan tool instructions to select cranking mode. This will automatically set cranking speed to 250 RPM and set throttle at wide open position.