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Engine Control Module/Powertrain Control Module

NOTE: For purpose of simplification, ECM and PCM will be refired to as PCM.

Vehicles equipped with manual transmission use an Engine Control Module (ECM). Vehicles equipped with automatic transmission use either ECM with separate Transmission Control Module (TCM), or a Powertrain Control Module (PCM), depending on model. PCM combines functions of ECM and TCM. PCM receives and processes signals from input devices. Operating conditions such as cold starting, altitude changes, acceleration and deceleration affect input device signals. Based on signals received, PCM sends signals to various components which control fuel injection, ignition timing, idle speed and emission control systems. For PCM location, see Fig 1-Fig 14 .

Fig 1: Locating Powertrain Control Module (Diamante - 1 Of 2)

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Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Fig 2: Locating Powertrain Control Module (Diamante - 2 Of 2)

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Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Fig 3: Locating Powertrain Control Module (Eclipse - 1 Of 2)

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Fig 4: Locating Powertrain Control Module (Eclipse - 2 Of 2)

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Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Fig 5: Locating Powertrain Control Module (Galant - 1 Of 2)

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Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Fig 6: Locating Powertrain Control Module (Galant - 2 Of 2)

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Fig 7: Locating Powertrain Control Module (Lancer - 1 Of 2)

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Fig 8: Locating Powertrain Control Module (Lancer - 2 Of 2)

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Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Fig 9: Locating Powertrain Control Module (Montero - 1 Of 2)

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Fig 10: Locating Powertrain Control Module (Montero - 2 Of 2)

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Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Fig 11: Locating Powertrain Control Module (Montero Sport - 1 Of 2)

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Fig 12: Locating Powertrain Control Module (Montero Sport - 2 Of 2)

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Fig 13: Locating Powertrain Control Module (Outlander - 1 Of 2)

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Fig 14: Locating Powertrain Control Module (Outlander - 2 Of 2)

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Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

NOTE: Components are grouped into 2 categories. First category covers INPUT DEVICES , which control or produce voltage signals monitored by PCM. Second category covers OUTPUT SIGNALS , which are components controlled by PCM.