Manuals through 2025 now available!
Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.
LEMON is the spiritual successor to CHARM, I recommend you try it!
Link:
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Valve Deactivation Solenoid: Testing and Inspection
DIAGNOSIS AND TESTING - MDS SOLENOIDThe Multi-Displacement System (MDS) has the following detectable issues:
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solenoid circuit
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fail to deactivate a cylinder(s)
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fail to reactivate a cylinder(s)
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low oil pressure
