The CHECK ENGINE light will come on when ignition is on and engine is not running. When engine is started, CHECK ENGINE light should go off. If light remains on while engine is running, a trouble code is present.
If light did not come on with key on and engine off, the CHECK ENGINE light circuit must be checked before continuing. See appropriate INITIAL DIAGNOSTIC PROCEDURE in this article if CHECK ENGINE light failed to operate. The initial diagnostic procedure is located with code charts.
To retrieve codes, turn ignition off. Install fuse in diagnosis terminal at the fuse block, located behind left side of instrument panel. See Fig 1 . Turn ignition on and count number of flashes from CHECK ENGINE light.

Fig 1: Installing Fuse In Diagnostic Terminal
Courtesy of SUZUKI OF AMERICA CORP.
As an example, a Code 21 will be identified by a flash, flash, pause and flash. A long pause will exist and Code 21 will be repeated 3 times. See Fig 2 . Each additional code will flash 3 times.
If system is operating properly (with no codes), a Code 12 should exist with ignition on and engine off. This indicates the diagnostic system is capable of storing codes.
Each individual code will be repeated 3 times and then display the next code. See Fig 2 . Once all codes are displayed, codes will be repeated. Remove fuse from diagnostic terminal in fuse block after codes are accessed.

Fig 2: Typical Code Display (Code 21 Is Shown)

Courtesy of SUZUKI OF AMERICA CORP.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Retrieving Codes