Engine Control Module (ECM)
On 9-3 models, ECM is located above right side kick panel, behind glove box. On 9-5 models, ECM is located in engine compartment, between inner and outer firewall below windshield, on passenger side. For ECM pin and wire color identification, see appropriate SELF-DIAGNOSTICS article.
ECM controls all engine functions: fuel injection, ignition timing, turbo boost pressure, idle speed, emission control, combustion analysis and self-diagnostics. For a description of ECM controlled functions, see TRIONIC ENGINE MANAGEMENT SYSTEM .
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 controlled by ECM.