Hyundai Accent: Knock Sensor (KS). Description and Operation

Knocking is a phenomenon characterized by undesirable vibration and noise and can cause engine damage. Knock Sensor (KS) is installed on the cylinder block and senses engine knocking.

When knocking occurs, the vibration from the cylinder block is applied as pressure to the piezoelectric element. When a knock occurs, the sensor produces voltage signal. The ECM retards the ignition timing when knocking occurs. If the knocking disappears after retarding the ignition timing, the ECM will advance the ignition timing. This sequential control can improve engine power, torque and fuel economy.

Installation

• Install the component with the specified torques. • ...

Knock Sensor (KS). Specifications

Specification Item Specification Capacitance (pF) 950 ~ 1,350 Resistance (MΩ) 4.87 ...

See also:

Disassembly
1. Disconnect the M-terminal (A) on the magnet switchassembly. 2. After loosening the 2 screws (A), detach the magnetswitch assembl ...

Ignition switch position
LOCK The steering wheel locks to protect against theft (if equipped). The ignition key can be removed only in the LOCK position. When turning the ignition switch to the LOCK position, push the k ...

Disassembly and Reassembly
1. Compress the coil spring with a strut spring compressor. Do not compress the spring more than necessary. 2. Loosen the lock nut. ...