No-Load Test
WARNING: This page is about a different car, the 2004 Lexus LS 430 and 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect battery-to-generator terminal "B" wire. See Fig 1. Using an ammeter and voltmeter, connect negative ammeter lead to disconnected generator terminal "B" wire end, and connect positive ammeter lead to generator terminal "B".
- Connect voltmeter positive lead to generator terminal "B" and negative lead to ground. See Fig 1. Start engine and increase engine speed to 2000 RPM. Both meters should read within specification. See GENERATOR SPECIFICATIONS . If voltage is more than specified, replace voltage regulator. If voltage reading is less than specified, check voltage regulator. See VOLTAGE REGULATOR .