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Home >> Infiniti >> 1996 >> Q45 t >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - Q45 >> Computerized Engine Controls >> Engine Control Module (ECM) >> Power Circuits
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Power Circuits

  1. Turn ignition switch to ON position. Using a voltmeter, check for battery voltage between chassis ground and ECM terminals No. 24, 67 and 72. See Figure or Figure . If battery voltage is not present, check fusible link and fuse "G". Turn ignition switch to OFF position. Using a voltmeter, check for battery voltage between chassis ground and ECM power back-up terminal No. 80. If battery voltage is not present, check for overheated relays, fusible links and wiring.
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