Fuel Flow Diagnostic Function
- If navigator functions "RANGE," "FUEL," or "ECON" are not normal, check navigator using fuel flow diagnostic function as follows: Press "SPD" button. Within 5 seconds press "US/M" and "RESET" buttons simultaneously. Then press "SET" button. Enter "123" into navigator. The display should read from 2 to 4 with engine idling.
- To deactivate diagnostic function, press "SET" button and then another function button. If fuel flow function is good, replace navigator. If fuel flow function indicates failure, check fuel flow system. On models with EFI, check logic module. On models with 2.6L engine, check fuel flow sensor.