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Alternator Control System Test: Integra

  1. Disconnect 4-pin connector from alternator. Start engine and turn the headlights on. Use DVOM to measure voltage between 4-pin connector terminal No. 2 and battery positive terminal. See Figure . If reading is one volt or less, go to next step. If reading is greater than one volt, go to step 3).
  2. Turn headlight and ignition switch to OFF positions. Disconnect 32-pin connector "A" from ECM. Use DVOM to measure resistance between connector "A" terminal No. 19 and 4-pin connector terminal No. 2 (White/Green wire). If continuity is indicated, go to GENERATOR/REGULATOR OUTPUT TEST  . If continuity is not indicated, repair open in White/Green wire.
  3. Turn headlight and ignition switch to OFF positions. Disconnect 32-pin connector "A" from ECM. Use DVOM to measure resistance between ground and connector "A" terminal No. 19 (White/Green wire). If continuity is indicated, repair short to ground in White/Green wire. If continuity is not indicated, replace ECM with a known-good unit and recheck system operation. If system tests okay, replace ECM.
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