Outline
The PCM controls energization to the starter relay according to an immobilizer system request to improve security.
While not in P or N position, the starter relay energization by the ignition key is inhibited. (ATX)
While not in neutral, the starter relay energization by the push button start is inhibited. (MTX)
Block Diagram

Operation
The PCM establishes a ground to the starter circuit. Therefore when the ignition is switched to START, the starter relay is energized and the starter motor rotates. As a result, the engine starts normally.
The PCM does not establish a ground to the starter circuit. Therefore, even if the ignition switch is turned to the start position, the starter motor does not rotate because the starter relay does not energize, and the engine does not start.

The PCM turns the starter relay off with the engine speed at the set value or more (value from engine coolant temperature fluctuates).
Refrigerant Charging
Starter Disassembly/Assembly [Skyactiv G 2.0]Knock Sensor (Ks) Removal/Installation
1. Disconnect the negative battery cable..
2. Remove the plug hole plate..
3. Remove the intake manifold..
4. Disconnect the KS connector.
5. Remove the KS..
6. Install in the reverse order of removal.
KS Installation Note
Verify that there is no foreign matter caught between ...
D Pillar Trim Removal/Installation
1. Disconnect the negative battery cable..
2. Remove the following parts:
a. Trunk board.
b. Trunk end trim.
c. Rear scuff plate.
d. Trunk side trim.
3. Take the shaded area shown in the figure, and remove the D-pillar trim in
the direction of the arrow in the order of (1), (2), (3) wh ...
Heater, Ventilation And Air Conditioning
Abbreviation
AAS
Active Adaptive Shift
ABS
Antilock Brake System
ABDC
After Bottom Dead Center
ACC
Accessories
AFS
Adaptive Front Lighting System
...