General notes on ignition system

The battery must only be disconnected and connected with the ignition switched off since the Engine Control Module (ECM) can otherwise be damaged.
For the electrical components to work properly, a voltage of at least 12.7 V is required.
It is possible that the control module will recognize a malfunction and store a DTC during some tests. After completing all tests and repairs, DTC memory should therefore be checked and erased if necessary.
If the engine only starts briefly and then turns off again after troubleshooting, repair or checking of the components, it may be that the immobilizer is blocking the Engine Control Module (ECM). DTC memory must then be checked and if necessary, control module must be adapted.

CAUTION:

Safety precautions before disconnecting battery:
See BATTERY DISCONNECT PRECAUTIONS .
The battery must only be disconnected and connected with the ignition switched off since the Engine Control Module (ECM) can otherwise be damaged.