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Checking ignition system
Safety precautions
To prevent injuries to persons and/or damage to the fuel injection and ignition system, the following must be noted:
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◆ Do not touch or disconnect ignition wiring when the engine is running or at starter speed.
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◆ Always switch off the ignition before connecting or disconnecting ignition system wiring. This also applies to HT cables and measuring instrument leads.
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◆ To run engine at starting speed without actually starting it (for example, in order to test compression), unplug connector from the output stage of the ignition coils and also the connectors on the injectors.
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◆ In the case of some tests, a fault may be recognised and stored by the control unit. At the end of all tests and repairs, therefore, the fault memory should be interrogated and, if necessary, erased. After erasing the fault memory the readiness code must be renewed .
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◆ Always switch off the ignition before washing the engine.
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