LEMON Manuals: Even more car manuals for everyone
Home >> Honda >> 1988 >> Prelude S, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> PGM-Carb System >> Testing >> Ecu Input Signals >> A/C Clutch Signal

A/C Clutch Signal

  1. Connect system checker harness between ECU and ECU connectors. Start engine. Measure voltage between terminals A2 (pos.) and B8 (neg.). If battery voltage is not present, go to step 3).
  2. If battery voltage is present, repair short in Red/Green wire between ECU terminal A2 and compressor control unit. If wire is okay, inspect compressor control unit. Replace if necessary.
  3. Turn A/C switch to "ON" position. If A/C does not operate, service A/C system. If A/C system functions properly, measure voltage between terminals A2 (pos.) and B8 (neg.). If battery voltage is present, A/C clutch signal is okay. If battery voltage is not present, repair open in Red/Green wire between ECU terminal A2 and compressor control unit. If wire is okay, inspect compressor control unit. Replace if necessary.
scientia non olet · About LEMON Manuals