| Note the following if testers and measuring instruments have to be used during a road test: |
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| Test equipment must always be secured on the rear seat and operated from that position by a second person. |
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| If test and measuring instruments are operated from front passenger's seat and the vehicle is involved in an accident, the person sitting in this seat could be seriously injured when the airbag is triggered. |
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| To avoid any risk of injuries to persons and/or damage to the fuel injection and ignition system, always observe the following safety precautions. |
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| Persons wearing a cardiac pacemaker must at all times maintain a safe distance from high-voltage components such as the ignition system and gas-discharge headlights. |
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| Do not touch or disconnect ignition wiring when the engine is running or being turned at starter speed. |
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| Always switch off the ignition before connecting or disconnecting injection or ignition system wiring or tester cables. |
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| Always switch off the ignition before cleaning the engine. |
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| Always switch off the ignition before connecting or disconnecting the battery, otherwise the engine control unit may be damaged. |
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| If the engine has to be operated at the starting speed without actually starting (e.g. to test compression pressure), detach the four connectors from the ignition coils using assembly tool -T40039- → Chapter. Also remove fuse 27 from fuel pump control unit -J538-. |
Note | Removing fuse 27 will interrupt the voltage supply for the fuel pump control unit -J538-. |
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