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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
>>
Modes of Operation
>>
Ignition Switch Off Mode
Ignition Switch Off Mode
IGNITION SWITCH OFF MODE
When ignition switch is turned to OFF position, the
Powertrain Control Module
(PCM)
stops operating the injectors, ignition coil, Automatic Shutdown
(
ASD
)
relay
and
fuel pump relay
.