Electronic Control Module (ECM)

An 88-pin ECM monitors and controls all engine management functions. See Fig 1. ECM is located under driver's seat (911 Carrera and 911 Carrera 4). ECM has the ability to store fault codes related to fuel injection and ignition system. Detected faults remain stored for at least 50 engine starts.

ECM coding distinctions are made between manual and automatic transmissions. ECM will activate Malfunction Indicator Light (MIL).

Fig 1: Identifying Control Module Connector Terminals

Courtesy of PORSCHE OF NORTH AMERICA, INC.

NOTE: Components are grouped into 2 categories. The first category is INPUT DEVICES, which are components that control or produce voltage signals monitored by ECM. The second category is OUTPUT SIGNALS, which are components controlled by ECM.