See also:

Brake system
The brake system has two separate hydraulic circuits. If one circuit malfunctions, you will still have braking at 2 wheels. ...

Brake fluid
Check the brake fluid level in the reservoir. If the fluid level is below the MIN line or the brake warning light comes on, add Genuine NISSAN Super Heavy Duty Brake Fluid or equivalent DOT 3 fl ...

Overdrive (O/D) OFF switch
Overdrive (O/D) OFF switch When the O/D OFF switch is pushed with the shift selector in the D (Drive) position, the light in the instrument panel illuminates. See “Overdrive off indicator ...