Component Location
Description
1. General Description

The Camshaft Position Sensor (CMPS) is a sensor that detects the compression TDC of the NO. 1 cylinder. The CMPS consists of a hall type sensor and a target on the end of the intake camshaft. When the target triggers the sensor, the sensor voltage is 5V. If not, the sensor voltage is 0V. These CMPS signal is sent to the ECM and the ECM uses the CMPS signal for synchronizing the firing of sequential fuel injectors.

2. DTC Description

The ECM monitors the camshaft sensor signal transiton position which must change only once per crankshaft revolution. If no camshaft signal is detected while crankshaft signal is detected, the ECM sets DTC P0340.

DTC Detecting Condition

Item

Detecting Condition

Possible Cause

DTC Strategy

● Check Camshaft Signal Switching

● Open or short in signal, ground or power supply circuit

● Contact resistance in connectors

● Misadjust crankshaft and camshaft pulley position

● Defective CMP sensor

Enable Conditions

● No Crankshaft Position Sensor signal error

Threshold Value

● No signal switching

● Rising/falling camshaft edge not within defined window : -5 ~ +5 teeth

Diagnostic Time

● 80 revolutions

Fail Safe

● Injection start position is fixed to 180°CRK before TDC

● Spark retard ( 7 ~12°CRK )

Schematic Diagram
note
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Signal Waveform
Яндекс.Метрика