Camshaft Sensor HH-CMP2903

HEHUA NO: HH-CMP2903

OEM NO: 
23431-5M006
23731-4M500
23731-4M5006
23731-4M505
23731-4M506
23731-4M50B
23731-5M000
23731-5M001
23731-5M005
23731-4M50C
B3731-4M526
2132537
SU5745
5S1359
PC462
PC459
23731-5M005
23731-5M006
B3731-4M50B
B3G31-4M50B

APPLICATION:
INFINITI FX35 (2003 – 2008)
INFINITI G35 (2003 – 2007)
INFINITI I35 (2002 – 2004)
INFINITI M35 (2006 – 2008)
INFINITI QX56 (2004 – 2010)
NISSAN 350Z (2003 – 2006)
NISSAN ALTIMA (2002 – 2006)
NISSAN ARMADA (2005 – 2012)
NISSAN FRONTIER (2005 – 2012)
NISSAN MAXIMA (2002 – 2008)
NISSAN MURANO (2003 – 2007)
NISSAN NV1500，2500，3500 2012
NISSAN PATHFINDER (2004 – 2012)
NISSAN QUEST (2004 – 2009)
NISSAN TITAN (2004 – 2012)
NISSAN XTERRA (2005 – 2012)

CAMSHAFT SENSOR FUNCTION: FUNCTIONAL PRINCIPLE
The task of the camshaft sensor is to work with the crankshaft sensor to define the exact position of the crankshaft drive. Through the combination of both sensor signals, the engine control unit knows when the first cylinder is in the top dead point.

This information is needed for three purposes:

For the start of injection during sequential injection.
For the actuation signal of the solenoid valve for the pump-nozzle injection system.
For cylinder-selective knocking control.

The camshaft sensor works according to the Hall principle. It scans a ring gear on the camshaft. The rotation of the ring gear changes the Hall voltage of the Hall IC in the sensor head. This change in voltage is transmitted to the control unit and evaluated there in order to establish the required data.

Camshaft position sensor function

SYMPTOMS OF A FAULTY CAMSHAFT POSITION SENSOR: SYMPTOMS
A faulty camshaft sensor can cause the following symptoms:

Starting difficulties
Engine indicator lamp comes on
Fault code is stored
Control unit enters an emergency program
CAMSHAFT POSITION SENSOR FAULTY: CAUSE OF FAILURE
Reasons for failure of the camshaft sensor can be:

Mechanical damage
Break in the encoder wheel
Internal short circuits
Interruption in connection to the control unit
CHECKING THE CAMSHAFT POSITION SENSOR: TROUBLESHOOTING
Check the camshaft sensor: Hall generator OK
Hall generator – example OK

TROUBLESHOOTING:
Check sensor for damage ✓
Read out the fault memory ✓
Check the electrical connections of the sensor wiring, the connector, and the sensor for correct connection, breaks, and corrosion.
1Checking the connection line
Check the connection line from the control unit to the sensor using the ohmmeter. Remove the connector from the control unit and remove the sensor, check the individual cables for continuity. A circuit diagram is required for the pin assignment. Reference value: approx. 0 Ohm.

2Checking the connection lines for short circuit to frame
Check the connection lines for short circuit to frame. Measurement between sensor plug and vehicle ground, control unit plug removed. Reference value: >30 MOhm.

3Checking the supply voltage
Check the supply voltage from the control unit to the sensor. Insert the control unit plug, switch the ignition on. Reference value: approx. 5 V (note manufacturer’s specifications).

4Checking the signal voltage
Check the signal voltage. Connect the measuring cable from the oscilloscope and start the engine. A square wave signal must be displayed on the oscilloscope.