Mitsubishi Grankai air conditioner has high idle speed.

Idle switch does not match; There is something wrong with the idle speed regulating valve (ISC).

1. Idle switch does not match. Turn on the air conditioner or turn the steering wheel when idling. If the engine speed does not rise, it is the mismatch of idle switch that causes the air conditioner to idle at high speed. Troubleshooting: Adjust, repair or replace the throttle position sensor.

2. There is something wrong with the idle speed regulating valve (ISC). Check the starting sound of idle speed regulating valve. If there is no starting sound, there is something wrong with the idle speed regulating valve (ISC). Troubleshooting: clean or replace the idle speed regulating valve, and basically set the idle speed with a special decoder.