Nissan Juke Service and Repair Manual : S terminal circuit


The output voltage of the alternator is controlled by the IC voltage regulator at the S terminal detecting the input voltage.

The S terminal circuit detects the battery voltage to adjust the alternator output voltage with the IC voltage regulator.

Diagnosis Procedure


1. Turn ignition switch OFF.

2. Check if S terminal is clean and tight.

Is the inspection result normal? YES >> GO TO 2.

NO >> Repair S terminal connection.


Check voltage between alternator harness connector and ground

Is the inspection result normal?

Is the inspection result normal? YES >> Refer to CHG-12, "GASOLINE ENGINE MODELS : Work Flow".

NO >> Check harness for open between alternator and fuse.

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