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Code 054 - position sensor malfunction camshaft(DPRV)

Sensor not connected to wiring harness

1. Check sensor connection to wire harness.
2. If the sensor cable plug is plugged into the wiring harness outlet, check that the plug is connected correctly according to wiring diagram harness. If the sensor is connected incorrectly, then, as a rule, along with the fault code "054", for example, the fault codes "053", "023", "024" can be recorded.

Water present in the sensor connector

1. If the sensor is properly connected to the wiring harness receptacle, disconnect the harness receptacle from the sensor and check for water in the connector. If necessary, shake out the water from the plug and socket of the sensor connector, clean the contacts from dirt.
2. After eliminating the malfunction, turn on the ignition, start the engine and check for the absence of the “054” DTC.

Short circuit on ground of the signal wire of the sensor

1. Disconnect the transducer and assembly from the wiring harness to test for circuit integrity. Ignition OFF, use an ohmmeter to check the connection of circuit "8" of the harness with engine ground: from track "2" of the sensor socket to metal parts of the engine.
2. Repair the indicated circuits as necessary.
3. After eliminating the malfunction, turn on the ignition, start the engine and check for the absence of the “054” DTC.

Broken sensor signal wire

1. Carefully inspect the integrity of the sensor cable and its sheath. The cable could be damaged by the cooling fan or hot intake pipes of the motor.
2. To test the integrity of the harness circuit, disconnect the sensor and unit from the harness.
3. With the ignition off, check with an ohmmeter the connection of circuit "8" from contact "2" ("DPRV +") of the sensor socket to contact "8" of the block socket.
4. After eliminating the malfunction, turn on the ignition, start the engine and check for the absence of the “054” DTC.

Short circuit on the wiring of the signal wire of the sensor

1. Disconnect protective case sensor sockets.
2. Turn on the ignition and use a voltmeter to check the voltage between the sensor socket contacts "2" ("DPRV +") and "3" ("DPRV-0V").
3. If the voltage is about "12 V", then disconnect the sensor and control unit from the wiring harness. Disconnect the battery from the electrical system and check with an ohmmeter the connection between contact "2" of the sensor socket and contacts "18", "27" and "37" of the block socket.
4. After eliminating the malfunction, turn on the ignition, start the engine and check for the absence of the “054” DTC.

Breakage of the shielding of the sensor wires or harness

1. To check a probable malfunction, disconnect the sensor and the unit from the wiring harness and, with the ignition off, check the integrity of the shielding braid of the wire “8” of the cable with an ohmmeter: from contact “3” of the sensor socket to contact “19” of the socket of the unit.
2. If necessary, additionally inspect the quality of crimping and connections of the sheaths of the shields of the wires in the body of the bundle.
3. After eliminating the malfunction, turn on the ignition, start the engine and check for the absence of the “054” DTC.

Broken wire of power supply of the sensor

1. Disconnect the protective cover from the sensor wiring harness socket.
2. Turn on the ignition and check the voltage between the terminals "1" ("+ 12V") and "3" ("0V") of the sensor socket with a voltmeter. If the measured voltage is close to zero, then there is probably an open circuit "37d" of the sensor power supply.
3. Disconnect the wiring harness from the sensor and the control unit and use an ohmmeter to check the continuity of the "37d" circuit between track "1" of the sensor socket and track "37" of the control unit socket.
4. After eliminating the malfunction, turn on the ignition, start the engine and check for the absence of the “054” DTC.

The connection of the wires of the power supply of the sensor is reversed

1. Remove the protective cover from the sensor harness socket and, with the ignition on, check the voltage between the terminals "1" (+ 12V) and "3" (0V) of the sensor with a voltmeter — it should be equal to the voltage of the electrical system.
2. If the voltage is close to zero, then disconnect the sensor and the control unit from the wiring harness and check with an ohmmeter the incorrect installation of the contact sockets in the sensor socket, provided:
   • if contact "1" ("DPRV + 12V") of the sensor socket is connected to contact "19" of the block socket,
   • and contact "3" ("DPRV-0V") of the sensor socket is connected to contact "37" of the block socket.
3. If necessary, reinstall the wires in the sensor block according to the wiring diagram.
4. After eliminating the malfunction, turn on the ignition, start the engine and check for the absence of the “054” DTC.

Malfunction of the camshaft position sensor

1. To check the sensor's serviceability, remove it from the engine and, without disconnecting the sensor from the wiring harness, with the ignition on, check the voltage at the sensor output between terminal “2” (“DPRV +”) and “3” (“DPRV-0V”). When doing this, remove and bring the steel object close to the end of the sensitive element of the sensor. This voltage should change:
   • from less than 1.0 V - when approaching a steel object;
   • up to about 5.0V - when it is removed.
2. If the voltage remains constant, then the sensor is defective and must be replaced.
3. After replacing the sensor, turn on the ignition, start the engine and check that there is no DTC "054".

Malfunction of high voltage ignition circuits

1. Check if the stability of the synchronization channel of the camshaft position sensor is influenced by interference from the on-board network created by a faulty high-voltage part of the ignition system.
2. Disconnect the high-voltage wires and check with an ohmmeter their active resistance together with the terminals — it should be within 6 kOhm. If necessary, replace high-voltage wires with serviceable ones.
3. Check for high voltage short to engine ground. Correct the route of high-voltage wires, clean the sheathing of wires and lugs from dirt.
4. Check the resistance of the secondary windings of the ignition coils — it should be within 13 kOhm.
5. After eliminating the malfunction, turn on the ignition, start the engine and check for the absence of the “054” DTC.

Malfunction of the engine control unit

1. Disconnect the control unit from the wiring harness and carefully inspect the integrity of the harness socket and unit plug contacts. If necessary, straighten the connector pins or replace them. If water is found in the connector, the block must be removed, the remaining water must be removed, and the block must be dried at a temperature not exceeding 85 ° C.
2. Connect the control unit to the system.
3. After replacing the tested block with a control one, turn on the ignition, start the engine and check for the absence of the "054" DTC.
4. If the code "054" is not registered on the control unit, then replace the tested unit with a good one.

Large mounting gap between sensor and marker

1. If the mounting clearance is higher than normal:
   • remove the sensor and inspect it for possible damage to the housing, clean the sensor from dirt. Check with a vernier caliper the size from the plane of the sensor to the end of its sensitive element — it should be within 24 ± 0.1 mm. A sensor that does not meet this requirement must be replaced;
   • if the sensor is serviceable, replace the camshaft gear cover with another, which provides a normal mounting clearance when installing the sensor.
2. After eliminating the malfunction, turn on the ignition, start the engine and check for the absence of the “054” DTC.

Small mounting gap between sensor and marker

1. Remove the sensor from the engine (if necessary, rotate the camshaft until a marker pin appears in the hole in the gear cover). Measure with a vernier caliper the distance from the sensor installation plane to the marker pin. Determine the actual clearance by subtracting 24 mm from the measured value. The gap should be within 0.5..1.2 mm.
2. If the mounting clearance is below normal:
   • remove the sensor and inspect it for possible damage to the housing, clean the sensor from dirt. Check with a vernier caliper the size from the plane of the sensor to the end of its sensitive element — it should be within 24 ± 0.1 mm. A sensor that does not meet this requirement must be replaced;
   • If the sensor is in good working order, when installing it, place a gasket of appropriate thickness under the sensor flange, which provides a normal mounting clearance when installing the sensor.
3. After eliminating the malfunction, turn on the ignition, start the engine and check for the absence of the “054” DTC.

Increased face runout of the camshaft gear

1. If the malfunction occurs intermittently at minimum speed idle move, then there is probably an increased face runout of the camshaft gear.
2. Remove the camshaft gear and inspect it. If its parts have increased wear, then the gear needs to be replaced.
3. After eliminating the malfunction, turn on the ignition, start the engine and check for the absence of the “054” DTC.

Incorrect insertion or missing marker

1. Probably the case:
   • incorrect pressing of the camshaft marker pin;
   • increased play of the camshaft marker;
   • the marker pin is not installed on the camshaft gear.
2. Remove the camshaft gear, inspect the location of the marker pin. If the above malfunctions occur, eliminate them.
3. After eliminating the malfunction, turn on the ignition, start the engine and check for the absence of the “054” DTC.

Incorrect installation of the camshaft marker

1. Probably there is an incorrect installation of the camshaft marker pin in relation to the phase of the top dead center of the first cylinder and the position of the synchronization disc.
2. Remove the camshaft position sensor and remove the spark plugs.
3. Crank the engine until the marker pin appears in the hole in the camshaft gear cover. Verify:
   • the middle of the marker pin must coincide with the middle of the first tooth of the synchronization disk;
   • the length of the marker pin should be 24 ± 1 ° of camshaft rotation.
4. If there are structural inconsistencies, eliminate them.
5. After eliminating the malfunction, turn on the ignition, start the engine and check for the absence of the “054” DTC.

Methods for checking the health of the sensor circuit

1. Start and warm up the engine. Check the nature of the appearance of the current malfunction code "054":
   • if the code is constant, then see reasons: 1..6, 8, 9, 11, 16.
   • if the code is inconsistent, see reasons: 2, 6, 10, 9, 11..16.
   • if the code appears only in the mode of limiting the minimum speed of a hot engine, then see the reasons: 9, 11, 12, 14.
2. After eliminating the malfunction, turn on the ignition, start the engine and check for the absence of the “054” DTC.

Information from the site was used

The sensor is not connected to the wire harness.

1.Check the sensor connection to the wire harness.
2.If the sensor cable plug is plugged into the wiring harness receptacle, check that the plug is connected correctly according to the wiring harness wiring diagram. If the sensor is connected incorrectly, then, as a rule, along with the fault code "054", for example, the fault codes "053", "023", "024" can be recorded.

A short to ground on the sensor signal wire.
2.To check circuit integrity, disconnect the sensor and unit from the wiring harness. Ignition OFF, use an ohmmeter to check the connection of circuit "8" of the harness with engine ground: from track "2" of the sensor socket to metal parts of the engine.
3. Repair the indicated circuits as necessary.

Broken sensor signal wire.
1.Carefully inspect the integrity of the sensor cable and its sheath. The cable could be damaged by the cooling fan or hot intake pipes of the motor.
2.To test the harness circuit, disconnect the sensor and unit from the harness.
3. With the ignition off, use an ohmmeter to check the connection of circuit "8" from contact "2" ("DPRV +") of the sensor socket to contact "8" of the block socket.
4.After elimination of the malfunction, turn on the ignition, start the engine and check that there is no malfunction code "054".

Short circuit to the wiring of the sensor signal wire.
1. Detach the protective cover of the sensor socket.
2. Turn on the ignition and check the voltage between the sensor socket contacts "2" ("ДПРВ +") and "3" ("ДПРВ-ОВ") with a voltmeter.
3.If the voltage is about "12 V", then disconnect the sensor and the control unit from the wiring harness. Disconnect the battery from the electrical system and check with an ohmmeter the connection between contact "2" of the sensor socket and contacts "18", "27" and "37" of the block socket.
4.After elimination of the malfunction, turn on the ignition, start the engine and check that there is no malfunction code "054".

Breakage of the shielding sheath of the sensor wires or harness.
1.To check a probable malfunction, disconnect the sensor and the unit from the wiring harness and, with the ignition off, check the integrity of the shielding braid of the wire "8" of the cable with an ohmmeter: from contact "3" of the sensor socket to contact "19" of the block socket.
2. If necessary, additionally inspect the quality of the crimping and connections of the sheaths of the shields of the wires in the body of the bundle.
3.After elimination of the malfunction, turn on the ignition, start the engine and check for the absence of the "054" malfunction code.

Broken wire of the sensor power supply.
1. Disconnect the protective cover from the sensor wiring harness socket.
2. Turn on the ignition and use a voltmeter to check the voltage between the terminals "1" ("+ 12V") and "3" ("0V") of the sensor socket. If the measured voltage is close to zero, then there is probably an open circuit "37d" of the sensor power supply.
3. Disconnect the wiring harness from the sensor and the control unit and use an ohmmeter to check the continuity of the "37d" circuit between track "1" of the sensor socket and track "37" of the control unit socket.
4.After elimination of the malfunction, turn on the ignition, start the engine and check that there is no malfunction code "054".

The connection of the wires of the power supply of the sensor is reversed.
1. Remove the protective cover from the sensor harness socket and, with the ignition on, check the voltage between the terminals "1" (+ 12V) and "3" (0V) of the sensor with a voltmeter - it should be equal to the voltage of the on-board network.
2.If the voltage is close to zero, then disconnect the sensor and the control unit from the wiring harness and check with an ohmmeter the incorrect installation of the contact sockets in the sensor socket, provided:
- if contact "1" ("DPRV + 12V") of the sensor socket is connected to contact "19" of the block socket,
- and contact "3" ("DPRV-OV") of the sensor socket is connected to contact "37" of the block socket.
3. If necessary, reinstall the wires in the sensor block in accordance with the electrical diagram.
4.After elimination of the malfunction, turn on the ignition, start the engine and check that there is no malfunction code "054".

Malfunction of the camshaft position sensor.
1.To check the sensor's serviceability, remove it from the engine and, without disconnecting the sensor from the wiring harness, with the ignition on, check the voltage at the sensor output between terminal "2" ("ДПРВ +") and "3" ("ДПРВ-ОВ") ... When doing this, remove and bring the steel object close to the end of the sensitive element of the sensor. This voltage should change:
- from less than 1.0 V - when approaching a steel object;
- up to about 5.0V - when removed.
2. If the voltage remains constant, then the sensor is defective and must be replaced.
3.After replacing the sensor, turn on the ignition, start the engine and check for the "054" DTC.

Malfunction of high voltage ignition circuits.
1.Check if the stability of the camshaft position sensor synchronization channel operation is influenced by the on-board noise caused by a faulty high-voltage part of the ignition system.
2. Disconnect the high-voltage wires and check with an ohmmeter their active resistance together with the tips - it should be within 6 kOhm. Replace high-voltage wires with good ones if necessary.
3.Check for the possibility of shorting the high-voltage discharge to engine ground. Correct the route of high-voltage wires, clean the sheathing of wires and lugs from dirt.
4. Check the resistance of the secondary windings of the ignition coils - it should be within 13 kOhm.

Malfunction of the engine control unit.
1.Connect the control unit to the system.
2.After replacing the tested block with a control one, turn on the ignition, start the engine and check for the absence of the "054" DTC.
3.If the code "054" does not register on the control unit, then replace the tested unit with a good one.

Large mounting gap between sensor and marker.
2.If the mounting clearance is higher than normal:
- if the sensor is serviceable, - replace the camshaft gear cover with another one that provides a normal mounting clearance when installing the sensor.
3.After elimination of the malfunction, turn on the ignition, start the engine and check for the absence of the "054" malfunction code.

Small mounting gap between sensor and marker.
1.Remove the sensor from the engine (if necessary, turn the camshaft until a marker pin appears in the hole in the gear cover). Use a vernier caliper to measure the distance from the sensor installation plane to the marker pin. Determine the actual clearance by subtracting 24 mm from the measured value. The gap should be within 0.5..1.2 mm.
2.If the installation clearance is below normal:
- remove the sensor and inspect it for possible damage to the housing, clean the sensor from dirt. Check the size from the plane of the sensor to the end of its sensitive element with a vernier caliper - it should be within 24 ± 0.1 mm. A sensor that does not meet this requirement must be replaced;
- if the sensor is in good working order, when installing it, place a gasket of appropriate thickness under the sensor flange, which provides a normal mounting gap when installing the sensor.
3.After elimination of the malfunction, turn on the ignition, start the engine and check for the absence of the "054" malfunction code.

Increased end runout of the camshaft gear.
1.If the malfunction manifests itself intermittently at the minimum idle speed, then there is probably an increased face runout of the camshaft gear.
2. Remove the camshaft gear and inspect it. If its parts have increased wear, then the gear needs to be replaced.
3.After elimination of the malfunction, turn on the ignition, start the engine and check for the absence of the "054" malfunction code.

Incorrect insertion or missing marker.
1.Probably takes place:
- Incorrect pressing of the camshaft marker pin;
- increased play of the camshaft marker;
- the marker pin is not installed on the camshaft gear.
2. Remove the camshaft gear, inspect the location of the pin-marker. If the above malfunctions occur, eliminate them.
3.After elimination of the malfunction, turn on the ignition, start the engine and check for the absence of the "054" malfunction code.

Incorrect installation of the camshaft marker.
1. Probably, there is an incorrect installation of the camshaft marker pin in relation to the phase of the top dead center of the first cylinder and the position of the synchronization disk.
2. Remove the camshaft position sensor and unscrew the spark plugs.
3.Turn the engine crankshaft until the marker pin appears in the hole in the camshaft gear cover. Verify:
- the middle of the marker pin must coincide with the middle of the first tooth of the synchronization disc;
- the length of the marker pin should be 24 ± 1 ° of camshaft rotation.
4. If there are constructive discrepancies, eliminate them.
5.After elimination of the malfunction, turn on the ignition, start the engine and check for the absence of the "054" malfunction code.

Methods for checking the health of the sensor circuit.
1.Start and warm up the engine. Check the nature of the appearance of the current fault code "054":
- if the code is constant, then see the reasons: 1..6, 8, 9, 11, 16.
- if the code is inconsistent, then see reasons: 2, 6, 10, 9, 11..16.
- if the code appears only in the mode of limiting the minimum speed of a hot engine, then see the reasons: 9, 11, 12, 14.
2.After elimination of the malfunction, turn on the ignition, start the engine and check for the absence of the "054" malfunction code.

This can happen at any time without warning. Imagine you are driving on the highway, driving on high speed, and then suddenly the engine of the car turns off. After you experience the unpleasant moments of power steering disengagement and efficiency deterioration brake system, you, parking on the side of the road, will wonder what happened to the car. A common reason An unexpected engine shutdown while driving is a malfunction of the camshaft sensor (camshaft position sensor).

Sometimes the camshaft sensor (CMP) can fail without warning, causing the engine to stall. In some cases, the driver may not be aware of sensor problems until the engine refuses to start when starting.

See also:

In this article, we will look at the main symptoms of a malfunction of the camshaft position sensor, and also tell you what to do to fix the problem. But first, let's find out what this sensor does in a car.

What is a Camshaft Position (CMP) Sensor?

The camshaft controls the opening and closing of the intake and exhaust valves

The cylinder head of your car's engine contains one or two camshafts, which are equipped with petals that are necessary for the intake and exhaust valves to work. The crankshaft is located in the cylinder block, which, receiving torque from the movement of the pistons in the block, transmits it using gears, a timing chain (or timing belt) to camshaft.

Camshaft

In order to determine which cylinder of the engine is in the stroke, your car's computer monitors the position of the camshaft rotation relative to the position crankshaft using the camshaft sensor (CMP). The information received from the CMP sensor is necessary to adjust the timing of the spark supply to the combustion chamber and operation fuel injectors... Thus, the camshaft sensor directly affects the fuel consumption of the vehicle and the amount of emissions in the exhaust.

The most common camshaft sensors are magnetic and Hall effect sensors. Both types of sensors transmit a voltage signal to electronic unit engine control or on on-board computer cars.

The magnetic type of the camshaft sensor produces its own alternating current(sine wave). Typically this sensor has two wires. A Hall effect sensor uses an external power supply to receive a digital signal, and typically has three wires.

Camshaft position sensor

Depending on the make and type of your vehicle, your engine may have one or more camshaft sensors. There are also two types of CMP sensors that can be used in your car.

Camshaft sensor malfunction symptoms

Just like any part or component of your car, the CMP sensor will eventually stop working due to wear and tear. This will happen in any case as soon as its maximum service life has expired. This is usually due to wear on the inner wire winding or related component.

Typically, in this case, your engine may start to run intermittently, and the symptoms of a malfunction can vary depending on the type of sensor wear. For example, a sensor may wear out a connector, an internal sensor circuit, or fail a related component.

- On some vehicles, if the camshaft position sensor is faulty, the transmission may lock up in one gear until you turn off the engine and restart it. This can be repeated with a certain cyclicality.

- If the camshaft sensor starts to work incorrectly while the car is moving, you may feel that the car starts to jerk, losing speed.

- If the camshaft sensor is faulty you may experience a noticeable loss of engine power. For example, your car will not be able to accelerate above 60 km / h.

- may stall intermittently due to a malfunction of the CMP sensor

- If the sensor fails, you will notice poor engine performance: loss of dynamism, misfires when the ignition is turned on, jolts during acceleration, pops in the exhaust system, etc.

- On some car models, if the camshaft sensor is faulty the ignition spark can completely disappear, which ultimately leads to a failure to start the engine.

Once your vehicle's computer detects a malfunctioning camshaft position sensor, it will usually cause a dashboard indicator "Check engine" (Check Engine). Immediately after detecting poor performance of the CMP sensor, the computer will write the sensor error code into its memory. In order to accurately determine the cause of the camshaft sensor malfunction by connecting special equipment to the diagnostic connector of the machine. Further, using a special computer program read the error code. Below is a table of diagnostic error codes that are associated with wear on the camshaft sensor.

CMP Sensor Error Codes

Common CMP DTCs	Cause of camshaft sensor error
P0340 CMP	No signal from the camshaft sensor
P0341 CMP	Incorrect valve timing
P0342 CMP	Low signal level of the camshaft sensor circuit
P0343 CMP	High signal level of the camshaft sensor circuit
p0344 CMP	Unstable signal from the camshaft sensor (intermittent signal)

Location of the camshaft sensor in the car

As you can probably guess, the specific location of the camshaft position sensor varies by make and model. vehicle... In most cars, you can find the sensor somewhere around the cylinder head. Look for the sensor around the top of the timing belt location or in the protected wiring harness at the front of the engine.

The sensor can also be located at the back of the cylinder head.

Some car models may have a special compartment under the hood in which a camshaft sensor is installed (for example, in some cars manufactured by General Motors).

In addition, in some car models, the camshaft sensor may be located inside the cylinder head.

Check your vehicle manual if necessary to find out exactly where the CMP sensor is located. If you do not have a manual for the repair and maintenance of your car, then you can find it on the Internet or purchase it at a car shop, where a large selection of similar auto literature is presented.

We strongly recommend that all car owners purchase a similar book (manual for repair and maintenance) specifically for your modification and car model. The vehicle manual will help you in case of breakdowns and malfunctions, and will become a valuable reference for you to carry out the planned Maintenance vehicle and for minor repairs.

Camshaft Sensor (CMP) Troubleshooting

If your car's computer has detected a sensor error and has already turned on the "Engine check" icon on the dashboard, then you can easily find out the error code yourself, which led to the display on the tidy. To do this, we advise each driver to purchase an inexpensive set of diagnostic equipment for computer diagnostics... If you cannot afford to purchase a diagnostic scanner for a car, then contact any inexpensive car service where you are considered errors in a car computer.

After you know from the error code that there is a malfunction of the camshaft sensor or related components in your car, you should do some simple tests. Remember that a DTC indicating a potential CMP sensor failure does not necessarily mean that the CMP sensor itself has failed. After all, it is possible that the cause of the malfunction is not in the sensor, but in the sensor connector, or there is damage to the wires connected to it. Or the related components of the car may be out of order.

True, in order to accurately establish whether the camshaft sensor is functioning normally, you may need to carry out a large amount of diagnostics. It should be especially taken into account that in some cases, in order to check the effectiveness of the CMP sensor signal, you may need special equipment, without which it is difficult to establish the cause of the malfunction.

However, you can do a few simple checks yourself using a digital multimeter (DMM):

- First, check the electrical connector at the camshaft sensor and the condition of the wires. Disconnect the connector and check for signs of rust or debris. For example, fuel. All this can interfere with good contact for the transmission of electricity.

Then check for damaged wires: broken wires, signs of wires melting from nearby hot surfaces.

Also, make sure that the camshaft sensor wires do not touch the spark plugs or ignition coils, which can interfere and prevent the sensor from transmitting the correct signal.

- After the above checks, use a digital multimeter that can test alternating current (AC) voltage or D.C.(DC) - depending on the specific type of camshaft sensor that is used in your vehicle.

Also, before testing, you need to set the correct electrical parameters on the multimeter for the specific type of CPM sensor. Usually, such information is indicated in the manual for the repair and maintenance of cars.

- Some camshaft sensors allow you to create a splitter of the electrical circuit of the CMP sensor in order to read the signal from the sensor while it is working in the car.

If the type of your sensor does not allow you to connect the multimeter wires to it, then you can, by disconnecting the connector from the sensor, attach a copper wire to it by inserting it into each sensor connector.

Then plug the connector back into the sensor, being careful not to short-circuit the wires during testing. If you use this method, insulate the wires with electrical tape.

Testing the two-wire camshaft sensor

If the camshaft sensor in your car has two wires, then this means that the car manufacturer has installed a magnetic type of CMP sensor on the car. In this case, set on the multimeter " AC voltage".

Have an assistant turn the ignition key without starting the engine.

Now let's check the presence of electricity, which should flow through the sensor circuit. Take one lead of a multimeter and place it to ground (any metal part on the motor). You should lean the other terminal of the multimeter against each wire that you connected to the camshaft sensor connector. If none of the wires have electric current then the sensor is completely defective.

Place one terminal of the multimeter against one wire of the camshaft sensor, the other terminal of the measuring equipment against the second wire of the sensor. Look at the multimeter display. Check the indicator with the specification indicated in the car repair manual. In most cases, you will output a fluctuating signal between 0.3 and 1 volt.

If there is no signal, then the camshaft position sensor is faulty

Testing three wire camshaft sensor

After you have checked the camshaft sensor wires, the condition of its connector, etc., and determined that a three-wire CPM sensor is installed in your car, it's time to test its performance with a multimeter. To do this, set the multimeter to " direct current".

Ask the assistant to turn the key in the ignition, but without starting the engine.

Lean one lead of the multimeter to the ground (to a metal bracket, to a bolt or to a metal part of the motor). Connect the other lead of the multimeter to the power supply lead of the sensor. Compare the readings of the multimeter to the specifications in the repair manual of the machine.

Have your assistant start the engine.

Connect the red lead of the multimeter to the red lead of the sensor and the black lead of the multimeter to the black lead of the sensor. Compare the reading from your multimeter to the specification found in your vehicle repair manual. If the indicator on the multimeter is lower than indicated in the repair manual or the data is completely absent, then most likely the camshaft sensor is out of order.

Remove the camshaft sensor and check for signs of physical damage or contamination.

If, after self-diagnosis of the camshaft position sensor, you have established that it is completely serviceable, then there may be a breakdown or failure in the vehicle components associated with the sensor.

For example, the timing chain (or) may be under-tensioned or over-tightened. It is also possible that the belt tensioner or timing chain is worn out. Be careful!!!

In case of such problems with the machine, the cause of the malfunction can also be severe worn out belt Timing Because of this, the camshaft and crankshaft may lose sync. As a result, the camshaft sensor may send the wrong signal to the car computer. As a result, this will lead to improper ignition and fuel injection.