Motronic Injection System, Safety Precautions

Motronic Injection System, Servicing

Safety precautions

To reduce the risk of personal injury and/or damage to the fuel injection and ignition system, always observe the following:

CAUTION: Fuel system is under pressure. Before opening system, place rags around the connection. Then release pressure by carefully loosening connection.

- Only disconnect and reconnect wires for injection and ignition system, including test leads, when ignition is turned off.
- If engine is to be cranked at starting RPM without starting (e.g. for compression testing), disconnect connector from ignition coils and from fuel injectors.
- 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. Readiness code must be generated after DTC memory is erased.
- Always switch ignition off before cleaning engine.

CAUTION:
- Safety precautions before disconnecting battery:
- The battery must only be disconnected and connected with the ignition is switched off, since the Engine Control Module (ECM) can otherwise be damaged.

If special testing equipment is required during road test, note the following:

CAUTION:
- Test equipment must always be secured to the rear seat and operated from there by a second person.
- If test and measuring equipment is operated from the passenger seat, the person seated there could be injured in the event of an accident involving deployment of the passenger-side airbag.