General Notes on Fuel Injection

General Notes On Fuel Injection

NOTE:
- Fuel hoses in the engine compartment must be secured with spring-type clamps. Screw- type clamps or equivalent must not be used.
- The Engine Control Module (ECM) has On Board Diagnostic (OBD) capability, and is equipped with Diagnostic Trouble Code (DTC) memory. Before repairing or adjusting any components or systems, first check DTC memory. Also check all vacuum connections for leaks (unmetered air).
- For proper operation of electrical and electronic components, a Battery Positive Voltage (B+) supply of at least 11.5 volts is required.
- During some tests, malfunctions are recognized by the ECM and stored in DTC memory. For this reason, always check DTC memory after all tests and repairs, and erase DTC memory as necessary.
- Disconnecting and connecting the battery must only be done with the ignition switched off, otherwise the ECM could be damaged.
- Components marked with * are checked with "Check DTC Memory" function 02.
- Components marked with ** are checked with "Output Diagnostic Test Mode" function 03.


CAUTION!
- Do not use any gasket sealers or other automotive chemical compounds that contain silicone. Traces of silicone drawn into the engine pass unburned into the exhaust and can damage the oxygen sensor.
- Do not use any electrical contact sprays or equivalent near oxygen sensor connections. Proper oxygen sensor function requires reference to outside air via the cable. If any contact spray reaches the oxygen sensor, it can cause damage or improper function.