Mazda 3 Service Manual: Vehicle Speed Sensor (VSS) Inspection [FS5 A EL]
On-Vehicle Inspection
1. Inspect the power supply circuit for the VSS.
a. Remove the insulator from the transaxle.
b. Disconnect the VSS connector.
c. Switch the ignition to ON (engine off).
d. Measure the voltage at VSS connector terminal A (harness-side).
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If there is any malfunction, repair wiring harness between VSS and AT main relay.
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VSS specification
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B+
e. Switch the ignition to off.
f. Connect the VSS connector.
2. Inspect the GND circuit for the VSS.
a. Switch the ignition to off.
b. Measure the voltage at VSS connector terminal C (harness-side).
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If there is any malfunction, repair wiring harness between VSS and GND.
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VSS specification
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Below 1.0 V
3. Inspect the signal circuit for the VSS.
a. Connect the oscilloscope to the following TCM connector terminals and set it as below.
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(+) lead: TCM terminal Z
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(-) lead: battery negative terminal
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Oscilloscope setting: 1 V/DIV (Y), 2 ms/DIV (X), DC range
b. Start the engine.
c. Measure the wave form when the following conditions are met.
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Gear position: 3GR
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Vehicle speed: 30 km/h {19 mph}
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If there is any malfunction, replace the VSS..
Vehicle Speed Sensor (VSS) Removal/Installation [FS5 A EL]
CAUTION:
If foreign materials are stuck to the sensor, disturbance by magnetic flux
can cause sensor output to be abnormal and thereby negatively affect control.
Make sure that foreign m ...
Other materials:
Replacing Interior Light Bulbs
Overhead lights (Front)/Map lights * ,
Overhead lights (Front) * , Overhead
lights (Rear) * , Vanity mirror lights *
Wrap a small flathead screwdriver
with a soft cloth to prevent damage to
the lens, and then remove the lens by
carefully prying on the edge of the lens
with the flathead ...
Power Metal Oxide Semiconductor Field Effect Transistor (Power Mos Fet) Inspection
[Full Auto Air Conditioner]
1. Verify that the continuity between the power MOS FET terminals is as indicated
in the table.
If there is any malfunction, replace the power MOS FET.
If the blower motor operation is not normal even though no malfunction can
be verified, inspect the climate control unit..
...
Front Center Speaker Inspection
1. Disconnect the negative battery cable..
2. Remove the following parts:
a. Upper column cover.
b. Instrument cluster.
c. Center panel.
d. Center cover.
e. Dashboard upper panel.
f. Front center speaker.
3. Verify the resistance between the front center speaker terminals.
...
