Removal & Installation - Ford Ranger Maintaince And Repair Manual

correct amount of air/fuel ratio throughout the entire engine operational range.
Based on the information that is received and programmed into the PCM's memory, the PCM generates output
signals to control relays, actuators and solenoids. The PCM also sends out a command to the fuel injectors
that meters the appropriate quantity of fuel. The module automatically senses and compensates for any
changes in altitude when driving your vehicle.
REMOVAL & INSTALLATION
491−92 Models
1. Disconnect the negative battery cable.
2. Remove the inside, lower cowl trim panel from the passenger's side of the vehicle to expose the PCM.
3. Disengage the wiring harness connector from the PCM by loosening the connector retaining bolt, then
pulling the connector from the module.
4. Remove the PCM from the bracket by pulling the unit downward.
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HOW TO USE THIS BOOK
Typical PCM module
OPERATION