Output Diagnostic Test Mode: Notes

CAUTION: Fuel pump runs continuously while in output Diagnostic Test Mode (DTM). Check fuel injectors using only the time necessary (to prevent flooding of combustion chambers.

Output Diagnostic Test Mode is used when using Scan Tools VAG 1551/1552 or VAS 5051/5052, always continue with output diagnostic test mode until last component in output diagnostic test mode test sequence has been checked. If you are not using Scan Tools VAG 1551/1552 or VAS 5051/5052 follow scan tool manufacturer's instructions.

When Output Diagnostic Test Mode is performed on most engines ,Output Diagnostic Test Mode activates each component for 60 seconds, or until right arrow button is pushed to activate next component. Output Diagnostic Test Mode automatically terminates after 10 minutes.

When using scan tool in Output Diagnostic Test Mode to activate engine and emission components, components are checked either acoustically or by touch unless specified differently in component sequence list. Some components may be barely audible, check component by touch or use mechanics stethoscope if necessary.