Operation CHARM: Car repair manuals for everyone.
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: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Crankshaft Position Sensor: Testing and Inspection

The Crankshaft Position Sensor (CPS) provides a signal which the Vehicle Control Module (VCM-A) uses as reference to calculate RPM and crankshaft position. Refer to Ignition System/System Diagnosis/Procedures for additional information.

Diagnostic Trouble Code (DTC) PO337 and DTC P0338 will set if there is a crank sensor malfunction. Refer to Diagnostic Trouble Code Charts. Under Computer and Controls/System Diagnosis/Procedures. Testing and Inspection