Specification |
Item |
Specification |
Capacitance (pF) |
850 - 1,150 |
Description |
• |
Knocking is a condition 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. At this time, this sensor transfers the voltage signal higher than the specified value to the ECM and the ECM retards the ignition timing. |
• |
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. |
Components Location |
1. Knock Sensor (KS) |
Circuit Diagram |
Harness Connector
Inspection |
1. |
The engine control system can be more quickly diagnosed for troubles by using the vehicle diagnostic system (KDS). (Refer to "DTC guide") KDS provides the following information.
|
Component Inspection |
1. |
Turn the ignition switch OFF. |
2. |
Disconnect the knock sensor connector. |
3. |
Measure resistance between the knock sensor terminals 1 and 2. |
4. |
Check that the resistance is within the specification.
|
Removal |
1. |
Disconnect the negative battery terminal. |
2. |
Remove the intake manifold. (Refer to Engine Mechanical System - "Intake Manifold") |
3. |
Remove the knock sensor (A) after loosening the mounting bolt.
|
Installation |
|
1. |
Install in the reverse order of removal. |