Passport EX 2WD V6-3.2L SOHC (6VD1) (1997)
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A/C clutch control.
PCM Function
DESCRIPTION AND OPERATION
The PCM supplies either 5 or 12 volts to power various sensors or switches. The power is supplied through resistances in the PCM which are so
high in value that a test light will not light when connected to the circuit. In some cases, even an ordinary shop voltmeter will not give an accurate
reading because its resistance is too low. Therefore, a digital voltmeter with at least 10 megohms input impedance is required to ensure accurate
voltage readings. Tool J 39200 meets this requirement. The PCM controls output circuits such as the injectors, Idle Air Control (IAC), cooling fan
relays, etc., by controlling the ground or the power feed circuit through transistors or through either of the following two devices:
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Output Driver Module (0DM).
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Quad Driver Module (QDM).
PCM Inputs/Outputs
Inputs - Operating Conditions Read
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Air Conditioning "ON" or "OFF".
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Engine Coolant Temperature.
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Crankshaft Position.
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Exhaust Oxygen Content.
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Electronic Ignition.
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Manifold Absolute Pressure.
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Battery Voltage.
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Throttle Position.
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Vehicle Speed.
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Fuel Pump Voltage.
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Power Steering Pressure.
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Intake Air Temperature.
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Mass Air Flow.
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Engine Knock.
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Camshaft Position.
Outputs - Systems Controlled
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Evaporative Emission (EVAP) Canister Purge.
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Exhaust Gas Recirculation (EGR).
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Ignition Control.
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Fuel Control.
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Idle Air Control.
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Electric Fuel Pump.
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Air Conditioning.
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Diagnostics:
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Malfunction Indicator Lamp (Check Engine lamp).
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Data Link Connector (DLC).
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Data Output.
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Transmission Control Module.
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Alternator Gain Control.
PCM Reprogramming
DESCRIPTION AND OPERATION
The Rodeo / Passport allows reprogramming of the PCM without removing it from the vehicle. This provides a flexible and cost-effective method
of making changes in software calibrations.
