Mazda CX-5 Service & Repair Manual: Ion Sensor
Purpose/Function
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Detects ion generation in the combustion chamber for detecting pre-ignition.
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Detects ions which occur due to fuel combustion as current by applying bias voltage to the spark plug, which is amplified in the ignition coil internal circuit and input to the PCM.
Construction
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Built into the ignition coil.
Operation
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Accumulates the secondary current of the ignition coil in bias condenser (1) and detects ion current (2) by applying the bias voltage to the spark plug.
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Pulls in current (4) increased by current amplification circuit (3) to the ignition coil from the PCM.
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The PCM measures/converts the current sent to the ignition coil and monitors.
Ion generation mechanism
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Ions are generated based on: fuel combustion = chemical reaction / disassociation. The generated negative ions move to the center electrode of the spark plug to which bias voltage is applied, positive ions move to the grounded engine wall surface, and then current flows from the spark plug to the ignition coil.
Fail-safe
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Function not equipped.
Ion Sensor Inspection
DTC Inspection
1. Connect the M-MDS to the DLC?2.
2. Perform the DTC inspection using the M-MDS..
If any DTC related to the ignition coil/ion sensor is present, repair the
malfunctioning ...
Lap Pre Tensioner Seat Belt [Two Step Deployment Control System]
Purpose
The lap pre-tensioner seat belts retract and tighten the seat belt webbing
to protect the front passengers during a collision.
Function
The lap pre-tensioner seat belts ...
Other materials:
Odometer/Tripmeter
Purpose
The odometer/tripmeter notifies the user of the total travel distance or
the traveled distance over a specific interval.
Function
The instrument cluster calculates the traveled distance based on the traveled
distance signal from the PCM and displays it.
The ...
Purge Solenoid Valve
Purpose, Function
Introduces evaporative gas absorbed by the charcoal canister to the intake
manifold.
The purge solenoid valve opens according to the control signal from the PCM.
Construction
The purge solenoid valve is installed in the engine compartment.
...
Planetary Gear [Fw6 A EL, Fw6 Ax EL]
Purpose/Function
The planetary gear is a mechanism which shifts the drive force from the engine.
The planetary gear consists of multiple gears which rotate individually while
revolving. By controlling the individual rotation and revolving of the gears,
the transaxle performs gear shi ...
