P1109212 PDF

A service bulletin addressing diagnostic troubleshooting for a fault code P1109. It includes diagnostic conditions specifying that the engine must be running, and lists possible fault causes such as a heavily soiled throttle or a faulty mass air flow sensor. The bulletin provides detailed work instructions for checking the throttle adjusting unit and the MAF sensor voltage signals, with steps to determine if readings are within acceptable limits and actions to take if they are not.