What Causes Idle Vibration When the Air Conditioning is On in a Honda?
1 Answers
There are two main reasons why the Honda CR-V experiences idle vibration when the air conditioning is turned on: one is a load sensor issue, and the other is engine mount damage. 1. Engine: Normally, the engine vibrates during operation, including after starting the compressor, but the engine mounts filter out some of this vibration, making it less noticeable to us. The engine mount is located between the body and the engine and is part of the car's engine shock absorption system. If the engine mount collapses or is damaged, the engine's balance will be disrupted, and turning on the compressor may reach the resonance frequency, intensifying the vibration. 2. Load Sensor: Idle is the state where the engine runs at its lowest speed without any additional load. Turning on the air conditioning increases the load. The engine load sensor detects this increase and sends the signal to the engine control unit (ECU), which then commands the engine to increase its speed to handle the additional load. The engine automatically increases the throttle opening to allow more air intake, thereby boosting power output. If the throttle is not maintained for a long time, carbon deposits can easily form. These deposits can obstruct the engine's air intake, making it difficult or barely sufficient for the engine to drive the compressor, resulting in idle vibration.
