Without Scan Tool

Check-Engine Lamp (Malfunction Indicator Light M.l.L.)

- USA vehicles are fitted with a warning lamp that lights up if a component relevant to exhaust gas composition fails.

- As a function check of the warning lamp, the lamp lights up when the ignition is switched on and goes out when the engine is running after it has been started without depressing the accelerator.

- A flashing code of the warning lamp indicates the defective fault path.

- To trigger the flashing code, fully depress the accelerator pedal for 3 seconds with the engine off and the ignition on until the Check-Engine lamp flashes. Then ease off the throttle.

- If no fault is stored, i.e. no warning came from the warning lamp, a flashing code appears.

- The flashing code is listed in the Diagnosis/Troubleshooting plan.

- The fault can also be read directly using System Tester 9288. After the repair the fault memory must be erased using the System Tester.

- If the fault memory is read via the Check-Engine lamp, repairs may be performed using conventional shop equipment.