Mazda CX-5 Service & Repair Manual: Camshaft Position (CMP) Sensor

Mazda CX-5 Service & Repair Manual / Engine / Control / Camshaft Position (CMP) Sensor

Purpose/Function

Detects the camshaft speed as basic information for mainly determining the fuel injection timing and ignition timing.
Detects the camshaft speed and inputs it to the PCM as a CMP signal.

Construction

Intake CMP sensor

Installed on the cylinder head.
A GMR element has been adopted as the detecting element for detecting the intake camshaft speed.

Exhaust CMP sensor

Installed on the rear housing.
A GMR element has been adopted as the detecting element for detecting the exhaust camshaft speed.

Operation

Inputs the signal, which fluctuates according to the camshaft speed, to the PCM.

CMP sensor characteristic

Fail-safe

Intake CMP sensor


DTC No.	Fail-safe function
P0340:00	Set 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.

Camshaft Position (CMP) Sensor Removal/Installation

CAUTION: When replacing the CMP sensor, make sure there is no foreign material on it such as metal shavings. If it is installed with foreign material, the sensor output signal will malfu ...

Crankshaft Position (CKP) Sensor Inspection

Visual Inspection CAUTION: When foreign material such as an iron chip is on the CKP sensor, it can cause abnormal output from the sensor because of flux turbulence and adversely affect ...

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Camshaft Position (CMP) Sensor Inspection
Intake CMP Sensor Visual inspection CAUTION: When replacing the CMP sensor, make sure there is no foreign material on it such as metal shavings. If it is installed with foreign material, the sensor output signal will malfunction resulting from fluctuation in magnetic flux and caus ...