| General indications relative to the ignition system |
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| Only ignition related components are dealt with in this group. The remaining injection and ignition components → Chapter |
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| Before disconnecting or connecting the battery, the ignition must be switched off; if this instruction is not observed, the engine control unit may be considerably affected. |
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| The engine control unit is capable of self-diagnosis. |
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| The components marked * are tested by self-diagnosis. |
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| For perfect operation of electrical components, a minimum voltage of 12.4 V is required. |
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| On some tests it is possible that the control unit will detect and record a fault. Therefore, once all tests and repairs are finished, the fault memory must be consulted and erased if necessary. |
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| If the engine starts briefly and then stops after fault finding, repair or testing of components has been carried out, it could be due to the immobiliser blocking the engine control unit. In such a case, the fault memory must be consulted, adapting the control unit if necessary → Vehicle diagnosis, testing and information system VAS 5051, Fault memory: consult and erase. |
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