General notes on ignition system

• Only the components which specifically relate to the ignition system are dealt with here. For the other components of the injection and ignition system. Refer to Component locations overview 
• For trouble-free operation of the electrical components, a voltage of at least 11.5 V is necessary.
• Disconnecting and connecting the battery must only be done with the ignition switched off, otherwise the engine control module could be damaged.
• During some checks it is possible that the control module will detect and store a fault. Therefore after completing all checks and repairs the Diagnostic Trouble Code (DTC) memory must be interrogated and if necessary erased. Refer to Engine control module Diagnostic Trouble Code (DTC) memory, interrogating and erasing  .

• If the engine starts, runs for a short period and then stops, after troubleshooting, repairs or component tests, then the cause may be the immobilizer, which is blocking the engine control module. In such cases the control module must be adapted. Refer to Adapting components and functions  ; Adapting components and functions.

Safety precautions. Refer to Safety precautions 

Test data, spark plugs. Refer to Test data, spark plugs