Kia Carnival (2009+). Manual — part 253

2009 > G 2.7 DOHC >

INSPECTION

FUNCTION AND OPERATION PRICIPLE

Knocking is a phenomenon characterized by undesirable vibration and noise and can cause engine damage. Knock
Sensor (KS) senses engine knocking and the two sensors are installed inside the V-valley of the cylinder block. When
knocking occurs, the vibration from the cylinder block is applied as pressure to the piezoelectric element. At this time,
this sensor transfers the voltage signal higher than the specified value to the PCM and the PCM retards the ignition
timing. If the knocking disappears after retarding the ignition timing, the PCM will advance the ignition timing. This
sequential control can improve engine power, torque and fuel economy.

SPECIFICATION

Item

Specification

Capacitance (pF)

950 ~ 1,350pF

WAVEFORM

CIRCUIT DIAGRAM

Fuel System

Engine Control System - Crankshaft Position

Sensor (CPKS)

Fuel System

2009 > G 2.7 DOHC >

INSPECTION

FUNCTION AND OPERATION PRICIPLE

Crankshaft Position Sensor (CKPS) detects the crankshaft position and is one of the most important sensors of the
engine control system. If there is no CKPS signal input, the engine may stop because of CKPS signal missing. This
sensor is installed on transaxle housing and generates alternating current by magnetic flux field which is made by the
sensor and the target wheel when engine runs. The target wheel consists of 58 slots and 2 missing slots on 360 CA
(Crank Angle).

WAVEFORM

CIRCUIT DIAGRAM