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Home >> Mazda >> 2004 >> B4000 Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Symptom Troubleshooting [Engine] >> Electronic Engine Control (EEC) System >> Powertrain Control Hardware >> Smart Junction Box (SJB) >> Keep Alive Random Access Memory (RAM)
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Keep Alive Random Access Memory (RAM)

The PCM stores information in Keep Alive RAM (a memory integrated circuit chip) about vehicle operating conditions, and then uses this information to compensate for component variability. Keep Alive RAM remains powered when the ignition switch is off so that this information is not lost.

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