Grand Vitara 2002 16v petrol. Had new cambelt fitted by someone but has failed to start since being fitted, have checked timing, spark, fuel delivery injectors, all appear to be working fine. Dashboard has an Orange warning light on it with what appears to be a padlock in it. Only have one key no fob for door locking etc.

SOURCE: Suzuki Grand Vitara 2.0 litre

Same problem for me. The car would idle at about 2500 when started from cold and about 3 miles on would not idle at all, resulting in the revs dropping off when changing gear or stopping. Also rather jerky in top gear unless thrashed - numerous trips to the garage for air idle valve, injectors etc. but still a problem! Have just found out that GVs are a bit prone to carbon build up in the throttle body - mine was almost blocked - it now feels like a different car.

SOURCE: 2002 suzuki grand vitara brake warning goes on and off

Do you have a brake fluid accumulator(ABS)? If yes, the pistons/pulsing assembly are worn, and may need to be replaced.

If not, you may have a vacuum leak in the power booster (located on the firewall). Check all hose and clamps for a tight fit/cracks,etc. Vacuum leaks cause intermittent brake failure lights.

You may want to park the vehicle on a clean surface, pump the brakes a few times, and check for brake fluid leaks. If there is a leaking wheel cylinder (back brakes) , caliper (front brakes), or brake line, you will be able to see it.

Leaks cause pressure loss, and, thus, the brake warning light will illuminate.

SOURCE: removing rear door liner to fit new handle

The panel is secured by snap connectors--just use a thin steel bar to pop them like a regular door panel

SOURCE: central locking fob

Programming
When
Remote control buttons operated repeatedly while vehicle out of range and system becomes inoperative. System malfunction.
How
Ensure ignition switched OFF and all doors closed. Proceed as follows: Within 10 seconds, open driver's door and switch ignition ON. Within 10 seconds of switching ignition ON, switch ignition OFF. Within 20 seconds of switching ignition OFF, press and release driver's door contact switch 3 times. Within 10 seconds of releasing driver's door contact switch, switch ignition ON then OFF. Within 20 seconds of switching ignition OFF, press and hold both remote control buttons in turn for at least 5 seconds. The driver's door should lock and unlock once. Within 5 seconds of driver's door locking/unlocking, press remote control lock button Fig. 1 [1] or unlock button [2]. Programming procedure complete. Confirm programming has been successful by locking and unlocking vehicle.
NOTE: A maximum of 2 remote controls can be programmed.

SOURCE: how to reset check engine light 2006 grand vitara

In the manual it should tell ya otherwise look for a reset button in the fusebox! Goodluck.