| Observe the following points to prevent injury to persons and/or damage to the injection and preheating system: |
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| Disconnect and connect wires of the preheating and injection system and measuring device wires when the ignition is switched off. |
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| If the engine must be operated at starter speed, without it starting, (e.g. during compression pressure testing), disconnect the connector at the injection pump. |
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| Before disconnecting the battery determine the code of radio sets fitted with anti-theft coding. |
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| Switch off the ignition before disconnecting and connecting the battery, as this may damage the 4AV control unit. |
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