2002 LX470 205xxx. A few weeks ago I drove across the country and about 100 miles in, the alternator started making a squeaking sound and the volt gauge on my scan gauge showed 12.5v at idle, in gear, headlamps on. Normally it would sit at 14.3 regardless. Figured I’d pick a new alternator up from the parts store in the event it totally went out. Any time the engine was off idle, voltage ranged between 13.3 and 14.2. New interstate battery installed a few weeks prior. The truck managed to complete the 5000 mile trip + some off roaring with no issues. A finally got around to installing the new alternator today. Big surprise, same issue present. Going to find a reman denso like I should have from the start. I’ve never seen a the battery light illuminate on the dash, just the low voltage on the scan gauge. I would rebuild the alternator, but it’s a new looking aftermarket unit.
Voltage readings match from the scan gauge, batt terminals and ground to gen+.
Does anyone here have a scangauge volt reading at hot idle with max loads on? Defrost, A/C, brights etc?
On another note, this is a very simple install.
- remove air box
- remove belt
- unbolt ps pump (pull all the hoses and unit forwards)
- unbolt coolant overflow and position
- remove timing belt cover
- unbolt genny
- lift out the top
Voltage readings match from the scan gauge, batt terminals and ground to gen+.
Does anyone here have a scangauge volt reading at hot idle with max loads on? Defrost, A/C, brights etc?
On another note, this is a very simple install.
- remove air box
- remove belt
- unbolt ps pump (pull all the hoses and unit forwards)
- unbolt coolant overflow and position
- remove timing belt cover
- unbolt genny
- lift out the top