2004 Yamaha G22 UMAX MEDIUM DUTY I (48V - DC MOTOR) Service and Rep...
Although it wears the UMAX Medium Duty I name, this 2004 car is listed in the G22 family on the 48-volt DC motor, with the code G23EZ and the factory manual LIT-19616-22-04.
Yamaha kept the golf and utility versions of this platform in one service volume covering 2003 through 2007 and fifteen variants. That is why a utility car and a G-MAX golf car point at the same part number; the chassis, drive and electrical architecture are documented together.
A medium duty car spends its life loaded, so the sections on brake adjustment, rear axle service and suspension inspection tend to be the ones that get worn covers. Each gives the factory limit to measure against.
The 48-volt material covers battery and charger checks, solenoid and controller diagnosis, motor removal and inspection, with full wiring diagrams. Quote both G23EZ and the part number when confirming a part for this car.