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414-02-13 Alternator and Regulator 414-02-13 DIAGNOSIS AND TESTING (Continued) Test Step Result / Action to Take I2 CHECK THE VOLTAGE GAUGE OPERATION With the engine running, monitor the voltage gauge reading and the Yes battery voltage. The charging system is operating normally. Are the voltage readings consistent? No Check Instrument Cluster section to continue PINPOINT TEST J : THE ALTERNATOR IS NOISY Test Step Result / Action to Take J1 CHECK FOR ACCESSORY DRIVE NOISE Check the drive belt for damage and verify the installation. Yes Go to J2 Check the alternator mounting for loose bolts or misalignment. No Check for a bent alternator pulley. For further diagnostics, refer to the Accessory Is everything OK? Drive System section. J2 SUBSTITUTE A KNOWN GOOD ALTERNATOR Key in OFF position. Yes INSTALL the original alternator and CHECK Disconnect The alternator connector C161. other accessories to FIND the cause of the Install a known good alternator. Start up the engine. No REPLACE the alternator. Is the noise present with a known good alternator? RETEST the system for normal operation. G86728 en |