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HOMESERVICE MANUALSMAZDA20086 S SPORT, 4D HATCHBACK, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 22 (ENGINE CONTROLS - THEORY & OPERATION)COMPUTERIZED ENGINE CONTROLSPOWERTRAIN CONTROL MODULE
2008 Mazda 6 s Sport, 4D Hatchback, Standard

Powertrain Control Module

2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Powertrain Control Module
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2002 Mazda Tribute, 2002 Mazda Protege5, 2002 Mazda Protege, 2002 Mazda Millenia, and 2002 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.

The PCM, through various input sensors, monitors battery voltage, engine RPM, intake air volume, cranking signal, camshaft position, crankshaft position, intake air temperature, radiator and engine coolant temperatures, exhaust oxygen content, throttle position, EGR valve position, atmospheric pressure, gearshift lever position, clutch engagement, vehicle speed, braking, power steering operation, and A/C compressor operation.

The PCM utilizes this input information to control fuel injection system and operation of other output devices. Spark timing is also controlled by the PCM.

The PCM has a built-in fail-safe mechanism. If a fault occurs while driving, the PCM will substitute preprogrammed values. Driving performance will be affected, but vehicle may still be driven.

The PCM has a self-diagnostic function, which allows the module to store diagnostic trouble codes in its memory. A Malfunction Indicator Light (MIL), located on instrument cluster, informs driver of system problems.

ECM/PCM LOCATIONS

Application Location
B2300, B3000, B4000 & Tribute Passenger Side Of Cowl Area, Under Hood
Miata Left Side Of Dashboard, Behind Brake Pedal Bracket
Millenia Below Center Of Dashboard, Under Radio
MPV Right Side Of Dashboard, Behind Air Duct
Protege & Protege5 Passenger Floor, Under Carpet
626 Below Front Of Center Console, Under Radio
NOTE: Components are grouped into 2 categories. The first category covers INPUT DEVICES, which control or produce voltage signals monitored by the PCM. The second category covers OUTPUT SIGNALS, which are components controlled by the PCM.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.