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2016 – MX-5 – Engine

CAMSHAFT POSITION (CMP) SENSOR [SKYACTIV-G 2.0]

Purpose

• Detects the camshaft position as basic information for mainly determining the fuel injection timing and ignition timing.

Function

• Detects the camshaft position and sends it to the PCM as a camshaft position signal.

  CMP sensor characteristic

  

Construction

• The intake CMP sensor is located on the cylinder head.

• The exhaust CMP sensor is located on the rear housing.

• A magnetic resistance element has been adopted for the detection part of the CMP sensor.

• The magnetic resistance element detects a magnetic field which varies with the distance from the magnetized object (detection plate) and outputs as a voltage value.

  

Operation

1. The CMP sensor detects (1) the camshaft position.

2. When the camshaft position is detected, it sends (2) to the PCM as a camshaft position signal.

Fail-safe

Intake CMP sensor

DTC No.	Fail-safe function
P0340:00	Sets the electric variable valve timing control to the maximum cam retard mode.

Exhaust CMP sensor

DTC No.	Fail-safe function
P0365:00	Stops the fuel injection. Stops the ignition.

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