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Home >> Acura >> 1990 >> Integra LS, 2D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Idle Control System >> Clutch Signal Switch
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Clutch Signal Switch

  1. Connect PGM-FI test harness between ECU and ECU connectors. Turn ignition on. Measure voltage between PGM-FI test harness terminals B9 (positive) and A18 (negative). If voltage is more than 3 volts, go to step 3). If not, depress clutch and recheck voltage between terminals B9 and A18. If battery voltage is present, clutch signal is okay.
  2. If battery voltage is NOT present, disconnect 2-wire connector at clutch switch on top of clutch pedal. Measure voltage between PGM-FI test harness terminals B9 (positive) and A18 (negative). If battery voltage is NOT present, disconnect connector "B" from main wire harness only; DO NOT  disconnect from ECU. Recheck voltage. If battery voltage is present, repair short in Pink wire between ECU terminal B9 and clutch switch. If battery voltage is NOT present, substitute a known good ECU and retest. If problem goes away, replace original ECU.
  3. Disconnect 2-wire connector at clutch switch on top of clutch pedal. Check continuity between clutch switch terminals. If continuity is present, turn ignition on and measure voltage between Pink (positive) wire terminal and ground. If battery voltage is present, repair open in Black wire between clutch switch and ground connector located under dash, on right side of blower housing. If battery voltage is NOT present, repair open in Pink wire between ECU and switch.
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