A/C Idle-Up Circuit Check (Equipped With A/C)
WARNING: This page is about a different variant/trim than selected.
A/C amplifier sends an idle-up signal to ECM/PCM when A/C compressor clutch is in operation. ECM/PCM uses this information to adjust mixture and engine idle speed. To check A/C idle-up circuit see appropriate CHART C-1C under DIAGNOSTIC CHARTS.