Output Diagnostic Test Mode (DTM), activating: Requirements

Fig 1: Locating Coolant Fan Control Thermal Switch

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• Main fuses OK

Fig 2: Identifying Main Fuse Panel

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• Fuses 10, 28, 29, 32, 34 and 43 OK

NOTE:

• Checks using the output Diagnostic Test Mode (DTM) can only be performed if the engine is not running and the ignition is switched on.
• The output DTM sequence will be aborted if the engine is started or a rotational impulse is recognized.
• During the output DTM sequence individual components will be activated until advancing to the next component by pressing the → button.
• Components are checked audibly or by touch.
• The electric fuel pump will run during the complete output DTM.
• The output DTM sequence will be aborted after 10 minutes.
• Run engine briefly first if there is a requirement to repeat the output DTM.