― Vehicle was driven 20,000 km {12,427 mile} (distance specified for sedimentor draining during periodic inspection servicing) since sedimentor data reset was performed
― During fuel injector carbon deposit burn-off
1.If the PCM detects engine oil deterioration or an excess engine oil level, it sends (1) the wrench indicator light request signal to the instrument cluster.
2.The instrument cluster microcomputer turns the transistor on (2) based on the engine oil warning light request signal.
3.When the transistor turns on, a ground circuit with the engine oil warning light is established and the engine oil warning light illuminates (3).