High Idle Speed
- Check accelerator pedal linkage.
- Check dashpot. See SYSTEM/COMP TESTS article.
- Check water temperature sensor circuit. See CODE 22 in TESTS W/CODES article.
- Check idle speed control valve. See SYSTEM/COMP TESTS article.
- Check intake air temperature sensor circuit. See CODE 24 in TESTS W/CODES article.
- Check throttle position sensor circuit. See CODE 41 in TESTS W/CODES article.
- Check A/C signal circuit. See CODE 51 in TESTS W/CODES article.
- Check switch condition signal. See CODE 51 in TESTS W/CODES article.
- Check fuel injectors. See SYSTEM/COMP TESTS article.
- Check cold start system. See SYSTEM/COMP TESTS article.
- Check ECU. See SYSTEM/COMP TESTS article.