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Jeep
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1998
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Wrangler 4WD L6-4.0L VIN S
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Repair and Diagnosis
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Powertrain Management
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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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Leak Detection Pump-PCM Output
Leak Detection Pump-PCM Output
Certain engines with certain emissions packages are equipped with a leak detection pump (LDP). The LDP is activated through this PCM output. Refer to Emission Control Systems for additional information.