Conditions For Running DTC

WARNING: This page is about a different car, the 2003 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

The engine speed is more than 40 RPM.
The battery voltage is more than 8.05 volts and less than 18 volts.
The ECM must change the state of the IMRC solenoid from OPEN to CLOSED.