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PCM Data You can retrieve data from the PCM by connecting the OBD II scan tool or the Honda PGM Tester to the Data Link reads data beyond that recommended by SAE so that this data may help you find the causes of intermittent problems. NOTE: neutral, and the A/C and all accessories turned off. Data Description Operating Value Freeze Data Diagnostic Trouble Code (DTC) If the PCM detects a problem, it will store it as a code consisting of one letter and four numbers. Depending on the problem, an SAE-defined code to the tester. If no problem is detected, there is no output. YES Engine Speed The PCM computes engine speed from the signals sent Nearly the same as tachometer indication at idle speed: 650 ± 50 rpm YES Vehicle Speed The PCM converts pulse signals from the Vehicle Nearly the same as speedometer indication YES Manifold Absolute Pressure (MAP) The absolute pressure created in the intake manifold by With engine stopped: Nearly the same as atmo- spheric pressure. 24 - 37 kPa (180 - 280 mmHg, 7.1 - 11.0 inHg) YES Engine Coolant Temperature (ECT) The ECT sensor converts coolant temperature into With cold engine: Same as ambient temper- YES Heated Oxygen Sensor (HO2S) The HO2S detects the oxygen content in the exhaust leaner than the stoichiometric ratio), the voltage signal the ratio is richer than the stoichiometric ratio), the 0.0 - 1.25 V At idle speed: about 0.1 - 0.9 V NO Main Menu Table of Contents |