Operation CHARM
: Car repair manuals for everyone.
Home
>>
Land Rover
>>
1995
>>
Range Rover Classic (LH) V8-3.9L
>>
Repair and Diagnosis
>>
Cruise Control
>>
Description and Operation
>>
Speed Input
Speed Input
Terminal 11 of the Cruise Control ECU (Z121) monitors the Vehicle Speed output signal from the Instrument Cluster (Z142) through the YK wire. This signal is a pulsing voltage and its frequency changes with vehicle speed.