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HOMESERVICE MANUALSDODGE AND RAM1992CARAVAN FWD V6-201 3.3LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTRELAYS AND MODULES - POWERTRAIN MANAGEMENTRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULEDESCRIPTION AND OPERATIONMODES OF OPERATIONOPEN LOOPIGNITION SWITCH ON (ZERO RPM)
1992 Dodge and Ram Caravan FWD V6-201 3.3L

Ignition Switch on (Zero RPM)

1992 Dodge and Ram Caravan FWD V6-201 3.3LSECTION Ignition Switch on (Zero RPM)

PCM READS:

Atmospheric Pressure (MAP sensor)
Engine Temperature (ECT Sensor)
Throttle Position (TPS)

PCM OPERATION:

The PCM calculates basic start-up fuel strategy, using current; atmospheric pressure, engine temperature, and throttle position.

- PCM pre-positions the idle air control motor.

- PCM energizes ASD and fuel pump relays for up to 3 seconds.

- PCM energizes oxygen sensor heating element.

Note: If the key is in the ON or START position and the PCM does not receive an ignition reference signal, (engine is not running), the PCM will deactivate the Automatic Shutdown (ASD) and fuel pump relays within 1 to 3 seconds.
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.