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
Lap Pre Tensioner Seat Belt [Two Step Deployment Control System]Pre Tensioner Seat Belt [Standard Deployment Control System]
Purpose
The pre-tensioner seat belt retracts and tightens the seat belt webbing to
protect the front passengers during a collision.
Function
The pre-tensioner seat belts operate (deploy) based on the operation signal
from the SAS control module to instantly retract and tigh ...
Check Valve
Except U.S.A. And CANADA
Purpose, function
The check valve maintain the pressure in the fuel tank at constant pressure.
Construction
The check valve is installed to the side of the charcoal canister.
Mainly consists of valve, umbrella, and spring.
O ...
General Procedures (Suspension)
Wheel and Tire Installation
1. When installing the wheels and tires, tighten the wheel nuts in a criss-cross
pattern to the following tightening torque.
Tightening torque
108—147 N·m {12—14 kgf·m, 80—108 ft·lbf}
Suspension Links Removal/Installation
1. For the ...