Description

The Camshaft Position (CMP) sensor consists of a magnet and an iron core which is wrapped with copper wire, and is installed onto the cylinder head. When the camshaft rotates, each of 3 teeth on the camshaft passes through the CMP sensor. This activates the internal magnet in the sensor, generating a voltage in the copper wire. The camshaft rotation is synchronized with the crankshaft rotation. When the crankshaft turns twice, the voltage is generated 3 times in the CMP sensor. The generated voltage in the sensor acts as a signal, allowing the ECM to locate the camshaft position. This signal is then used to control ignition timing, fuel injection timing, and the VVT system.

DTC No.

DTC Detection Condition

Trouble Area

• No Camshaft Position (CMP) sensor signal to ECM while cranking (2 trip detection logic)

Case 2

• Camshaft/Crankshaft misalignment detected at engine speed of 600 rpm or more (1 trip detection logic)

• Open or short in CMP sensor circuit

• Jumped tooth of timing chain

DTC P0340 indicates a malfunction relating to the CMP sensor (+) circuit (the wire harness between the ECM and CMP sensor, and the CMP sensor itself). Reference: Inspection using an oscilloscope

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A063955E13

HINT:

• The correct waveform is as shown in the illustration.

• G2+ stands for the CMP sensor signal, and NE+ stands for the Crankshaft Position (CKP) sensor signal.

• Grounding failure of the shielded wire may cause noise in waveforms.

Items

Contents

Terminals

CHI: G2+ - G2-CH2: NE+ - NE-

Equipment Settings

5 V/Division, 20 ms./Division

Conditions

Cranking or idling

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