On most 2008 and newer Honda models, there is a battery sensor attached to the negative battery terminal.
When diagnosing a charging system on any modern import, think “smart.” I learned this lesson several decades ago when repairing a cranking, no-start condition on a 1989 Honda Civic, which was equipped with one of the first “smart” charging systems. After verifying fuse continuity, I discovered that excessively high charging voltage had destroyed the Honda’s Engine Control Module (ECM).
A remanufactured alternator has just been installed on a 2008 Toyota Tundra. A few days ago, it left your shop with a happy owner, and now it has returned with the battery warning light glaring in your face. What’s your next move?
To quote a familiar situation: “My customer’s car is now on its third alternator in six months and my jobber store refuses to warranty a fourth.” In other words, the parts supplier believes that an underlying problem is causing these alternators to fail and, therefore, won’t warranty more alternators. While we occasionally experience a sequence