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:
Moonroof
The moonroof can be opened or closed electrically only when the ignition is switched
ON.
WARNING
Do not let passengers stand up or extend part of the body through the open moonroof
while the vehicle is moving:
Extending the head, arms, or other parts of the body through the moonroof is
da ...
Climate Control Unit [Manual Air Conditioner]
Purpose
The climate control unit performs air conditioning according to the operation
by the users and the driving conditions of the vehicle.
Function
The climate control unit determines optimum air-conditioning based on the
input signals from each sensor and the control mo ...
Afs (Adaptive Front Lighting System)
Outline
The AFS is a system which enhances the range of visibility when the headlights
are turned on by pointing the optical axis of the headlights in the direction
in which the vehicle is advancing according to the steering operation.
Function
The AFS is controlled by the ...
