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Testing 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 being turned at starter speed.
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◆ The ignition must be switched off before disconnecting or connecting ignition system wiring and high-voltage cables for test instruments.
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◆ In order to run the engine at starting speed without actually starting it (for example, to test compression), unplug the connectors on the ignition coils and also the connectors on the injectors.
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◆ During some of the tests the control unit may identify and record faults. The fault memory should therefore be interrogated and (if necessary) erased after completing the tests and any repair work that may be required. Generate readiness code after erasing fault memory.
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◆ The ignition must always be switched off when cleaning the engine.
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