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Jeep
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1997
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Grand Cherokee 4WD L6-4.0L VIN S
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Repair and Diagnosis
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Relays and Modules
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Relays and Modules - Powertrain Management
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Relays and Modules - Computers and Control Systems
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Engine Control Module
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Description and Operation
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Modes of Operation
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Introduction
Introduction
INTRODUCTION
All engines are equipped with sequential Multi-Port Fuel Injection
(MFI)
. The MFI system provides precise air/fuel ratios for all driving conditions.
Fig. 1 PCM:
The
Powertrain Control Module
(PCM)
operates the fuel system.