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Generator Control System Test: 2.3CL

  1. Disconnect generator 4-pin connector. Start engine. Turn on headlights (high beam). Use DVOM to measure voltage between generator 4-pin connector terminal No. 1 (White/Green wire) and battery positive terminal. See Figure. If one volt or less exists, go to step 3). If greater than one volt exists, go to next step.
  2. Turn headlight and ignition switch to OFF positions. Disconnect 32-pin connector from Electronic Control Module/Powertrain Control Module (ECM/PCM), located behind right kick panel. Use DVOM to measure continuity of White/Green wire between ECM/PCM connector terminal No. 19 and ground. See Figure. If continuity exists, repair short to ground in White/Green wire. If continuity does not exist, install known good ECM/PCM and recheck system. Replace ECM/PCM if necessary.
  3. Turn headlight and ignition switch to OFF position. Disconnect 32-pin connector from ECM/PCM, located behind right kick panel. Check continuity of White/Green wire between ECM/PCM connector terminal No. 19 and 4-pin generator connector terminal No. 1. See Figure and Figure. If continuity does not exist, repair open in White/Green wire. If continuity exists, test alternator and regulator. See GENERATOR/REGULATOR OUTPUT TEST .
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