Operation CHARM: Car repair manuals for everyone.

Malfunction Indicator Lamp (Check Engine)

Illuminates briefly when the Ignition Switch is turned to position II as a bulb check and extinguishes when the engine is running. Illumination at any other times indicates an engine fault.

Both Petrol and Diesel Engine Control Modules (Z132) are interfaced to the Instrument Cluster (Z142) via the BeCM (Z238).