Range Rover County LWB (LH) V8-4.2L (1993)
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Malfunction Indicator Lamp: Description and Operation
The check engine warning light is grounded by the Engine Control Module (ECM) (Z132) when a fault code is set. The Warning Lamps Check Unit
(Z161) applies ground to the warning light momentarily as a bulb check when the Ignition Switch (X134) is moved to position II.
