DTC U1100-00: Lin Communication: Engine Oil Level Sensor And Pcm Communication Error

U1100:00 (PCM - VIN Y) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	LIN communication: Engine oil level sensor and PCM communication error
Detection condition	With the following conditions continued for specified time, a communication error between the engine oil level sensor continues for specified time more. Battery voltage: 10-16 V 1.5 s have elapsed after the ignition was switched ON (engine off or on)
Fail-safe	Not applicable
Possible cause	Malfunction in wiring harness (including connector/terminal) between sub relay and engine oil level sensor (see CIRCUIT INSPECTION .) (see CONNECTOR INSPECTION .) Malfunction in LIN communication line (including connector/terminal) between engine oil level sensor and PCM (see CIRCUIT INSPECTION .) (see CONNECTOR INSPECTION .) Engine oil level sensor malfunction (Refer to applicable ENGINE OIL LEVEL SENSOR INSPECTION (VIN Y) in the service information.) PCM malfunction (Refer to applicable PCM REMOVAL/INSTALLATION (VIN Y) in the service information.)
Repeatability verification procedure	Clear the DTC recorded in the memory. (see CLEARING DTC .) Replicate the vehicle conditions at the time the DTC was detected using the following procedure. Switch the ignition ON (engine off) Perform the DTC inspection for the PCM. (See DTC INSPECTION .)
Courtesy of MAZDA MOTORS CORP.
1	Battery
2	Sub relay
3	Engine oil level sensor
4	PCM