Mazda CX-5 Service & Repair Manual: Ion Sensor
Purpose/Function
-
Detects ion generation in the combustion chamber for detecting pre-ignition.
-
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
-
Built into the ignition coil.
Operation
-
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.
-
Pulls in current (4) increased by current amplification circuit (3) to the ignition coil from the PCM.
-
The PCM measures/converts the current sent to the ignition coil and monitors.
Ion generation mechanism
-
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
-
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:
Sas Control Module Configuration (Using Read/Write Function) [Standard Deployment
Control System]
NOTE:
When performing configuration, it is necessary to read the vehicle specification
information from the SAS control module before replacing it. Connect the M-MDS
to the vehicle and perform vehicle identification before removing the SAS control
module. The vehicle specification i ...
Brake System/ABS Warning Light
Purpose/Function
The brake system/ABS warning light is built into the instrument cluster.
If a malfunction is detected in the system with the parking brake released,
the warning light illuminates to notify the driver.
Construction/Operation
When the DSC system and CAN l ...
Starting a Flooded Engine
If the engine fails to start, it may be flooded (excessive fuel in the engine).
Follow this procedure:
1. If the engine does not start within five seconds on the first try, wait ten
seconds and try again.
2. Make sure the parking brake is on.
3. Depress the accelerator all the way and hold it ...
