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:
Cargo Compartment Light Bulb Removal/Installation
1. Disconnect the negative battery cable..
CAUTION:
Always disconnect the negative battery cable before performing the cargo
compartment light bulb removal. Otherwise, the circuit may be shorted resulting
in damage to the related parts such as the rear body control module (RBCM).
...
Camshaft Position (CMP) Sensor Removal/Installation
CAUTION:
When replacing the CMP sensor, make sure there is no foreign material on
it such as metal shavings. If it is installed with foreign material, the sensor
output signal will malfunction resulting from fluctuation in magnetic flux and
cause a deterioration in engine control.
...
Transfer Oil Replacement [Fw6 Ax EL]
1. Remove the front under cover No.2..
2. Remove the drain plug with the washer.
3. Drain the oil into a suitable container.
4. Tighten the drain plug with a new washer.
Tightening torque
40—58 N·m {4.1—5.9 kgf·m, 30—42 ft·lbf}
5. Remove the oil level plug with ...
