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Home >> Isuzu >> 2004 >> Axiom Base, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Diagnostic Information & Procedures >> General Description >> A/C Clutch Diagnosis >> A/C Request Signal

A/C Request Signal

This signal tells the ECM when the A/C mode is selected at the A/C control head. The ECM uses this to adjust the idle speed before turning on the A/C clutch. The A/C compressor will be inoperative if this signal is not available to the ECM.

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