| Classification: | Reference: | Date: |
| EL04-003 | NTB04-016 | February 3, 2004 |
ALTERNATOR NOISE AFTER ENGINE SHUT OFF
| APPLIED VEHICLES: | 2002-04 Altima (L31) |
|---|---|
| 2002-04 Sentra (B15) | |
| APPLIED ENGINE: | QR25DE |
IF YOU CONFIRM:
A low-tone whistling noise comes from the alternator for not more than 10 seconds after the engine is shut off.
ACTION:
Please note that this noise is:
- Normal and is caused by a rotor “slow-down” function that is designed into the alternator
- NOT a failure symptom, so do not replace the alternator for this
Schumacher Electric 100A Car Battery Load Tester and Voltmeter, for Batteries Up to 1000 Cranking Amps, Charging System Diagnosis, for 6V/12V Power Sport, Automotive, and Marine Batteries, BT-100
- 3 Tests with 1 Device - Battery analysis, charging system test, and starter motor test
- Formidable Testing Power - Can safely test 6V and 12V batteries up to 1000 cranking amps with a 50-amp 6V load test and a 100-amp 12V load test
- Wide Compatibility - Works with gas and diesel vehicles, 6V and 12V batteries, including motorcycle, ATV, lawn tractor, car, boat, light truck, and RV batteries
- Simple Operation - Top-mounted rocker switch allows for easy use and the highly visible meter face clearly displays the testing results
- Battery Analysis - Determines if the battery capacity is healthy, the state of charge, and if there is an electrical drain or potential charging system issues
Last update on 2026-06-16 / Affiliate links / Images from Amazon Product Advertising API
Last update on 2026-06-16 / Affiliate links / Images from Amazon Product Advertising API
SOLAR BA5 100-1200 Cold Cranking Amps Electronic Battery Tester
- Test 12-volt batteries from 100-1200 CCA, operating range from 7-15 volts
- Test multiple battery types, including conventional, AGM, gel cell, spiral wound, and deep cycle batteries (with a starting rating)
- LED indication of battery and system pass or fail (as applicable), plus derived reading for the battery tested
- Easy to use--the device guides you through each step in the testing process
- Bright 4-digit LED display is great for bright- or low-light settings
Last update on 2026-06-16 / Affiliate links / Images from Amazon Product Advertising API
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