SECTION 4. METERS AND SWITCHES 1.METERS 1.1 Removal a. Disconnect the cable from the negative post. b. Remove the philips screw which hold the meter panel and lift up the panel assembly a little
The generated pulses are converted into voltage output through a converter.Then the voltage is divided into three different phase coils through a IC circuit.The tachometer pointer is swung by the compound magnetic field generated by the three point. b. Inspection -Tachometer The allowable error of a tachometer reading is specified as shown on the table below.If the reading deviates from the specified value.replace the meter assembly. Engine speed(rpm)
1000
2500
Allowable error(rpm)
±150
±150
1.3 Fuel gauge and Fuel gauge sensor Fig.10-3 Meter panel c. Then the meter panel can be detached by removing the wire harness couplings.
a.Construction When the fuel tank is full,the float is at the top and has moved the variable resister to a position of least resistance.This feeds maximum current into the meter circuit and the pointer swings fully to the F position.Consequently when the fuel level in the tank is low,everything acts in reverse.
Fig.10-4 Wire harness 1.2 Tacho/hour meter and sensor a.Construction An electric tachometer is employed along with a Tachosensor.The tach/hour meter converts engine revolutions to electric signals,which is sent to the tachometer.The tachometer displays the engine revolutions visually.The tachosensor generates 14 pulses per one engine revolution.
Fig.10-5 Fuel gauge sensor
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