Legacy F6-3.0L (2005)
Speedometer Head: Description and Operation
SPEEDOMETER
GENERAL
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The speedometer system is an electrical type that uses electric signals from the ABS or vehicle dynamics control (VDC) control module.
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Since the system does not use mechanical components such as rotating cable, there are no opportunities of occurring such problems as meter
needle vibration and cable disconnection. Also, it does not constitute any means of mechanical noise transmission.
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The odometer and trip meter readings appear on a liquid crystal display (LCD).
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At the trip meter display, the illumination level and the following trouble information (abnormality of various control modules, communication
system, vehicle speed signals, etc.) are shown in addition to the trip meter reading.
OPERATION
The ABS or VDC control module calculates the vehicle speed based on signals from the four wheel speed sensors and sends vehicle speed signals (4
pulses per rotation of wheel) to the speedometer drive circuit and odometer/trip meter drive circuit in the speedometer.
NOTE: Signals from the ABS or VDC control module are also used by the engine control module, automatic transmission control module, etc.
SPECIFICATIONS
