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Clutch Switch Signal (Civic D16Y5 Engine With M/T)

NOTE: This signal informs PCM when clutch is engaged.
  1. Turn ignition on. Using backprobe set, measure voltage between PCM 32-pin connector "A" terminal No. 9 (Brown/Black wire) and 31-pin connector "C" terminal No. 29 (Red wire). See PIN VOLTAGE CHARTS article. See Figure. If about 5 volts exists, go to step  4. If about 5 volts does exist, go to next step.
  2. Turn ignition off. Disconnect clutch switch 2-pin connector. Clutch switch is located above clutch pedal. See COMPONENT LOCATIONS . Turn ignition on. Measure voltage between PCM 32-pin connector "A" terminals No. 9 (Brown/Black wire) and 31-pin connector "C" terminal No. 29 (Red wire). If about 5 volts exists, replace clutch switch. If about 5 volts does not exist, go to next step.
  3. Turn ignition off. Disconnect PCM 31-pin connector "C". Check for continuity between ground and PCM 31-pin harness connector "C" terminal No. 29 (Red wire). If continuity exists, repair short in Red wire between PCM 31-pin connector "C" and clutch switch. If continuity does not exist, substitute a known-good PCM and recheck. See SUBSTITUTING PCM in SELF-DIAGNOSTICS - INTRODUCTION article. If symptom or indication goes away, replace original PCM.
  4. Depress clutch pedal. Measure voltage between PCM 32-pin connector "A" terminal No. 9 (Brown/Black wire) and 31-pin connector "C" terminal No. 29 (Red wire). If less than one volt exists, clutch switch signal is okay. If about one volt does not exist, go to next step.
  5. Turn ignition off. Disconnect clutch switch 2-pin connector. Clutch switch is located above clutch pedal. See COMPONENT LOCATIONS . Depress clutch pedal and check for continuity between clutch switch terminals. If continuity exists, go to next step. If continuity does not exist, adjust or replace clutch switch.
  6. Turn ignition on. Measure voltage between ground and clutch switch harness connector No. 1 (Red wire). If about 5 volts exists, repair open in Black wire between clutch switch harness connector and ground connection. Ground connection is located behind left kick panel, left of clutch switch, behind cruise control unit. See WIRING DIAGRAMS article. If about 5 volts does not exist, repair open in Red wire between PCM 31-pin connector "C" and clutch switch. See WIRING DIAGRAMS article.
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