Question about 2004 Toyota 4Runner

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Pcm? what is a pcm? in relation to a cam shaft position sensor?

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PCM , power control module, engine computer.
cam position sensor. produces a a/c voltage at a specific turn of the engine camshaft, witch is 2 times the turn of a crank shaft, witch also has a crank position sensor and produces a a/c signal, this signal go to the PCM. the crank position sensor lets the PCM were cylinder #1 is at all times, cam position sensor signal produces the the timing signal to the injector and coils, also it is used by the PCM to know if the engine is out of timing like timing belt or chain not synchronized properly, and controls the engine timing advance. if your code is P0346 bank 2 cam shaft sensor, check the wiring and confirm before replacing, if you have code P0011, or P0012 or P0017, this means that the cam variable timing in not working, oil may be too dirty or low oil, good luck

Posted on May 14, 2014

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PCM= Powertrain Control Module. It is the brains of the car, it reads the sensor in put from all sensors including the cam shaft position sensor

Posted on May 14, 2014

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94 Jeep Grand Cherokee 4 by 4 4.0 6 cylinder intermittently cuts out I know it's the cam position sensor but I've heard there's a way to test it and also how do you clean it


There is really nothing to clean, unless you find sludge on it.

Camshaft Position (CMP) Sensor

OPERATION The Camshaft Position Sensor, or CMP sensor is located inside the distributor. The PCM uses the CMP signal to determine the position of the No. 1 cylinder piston during its power stroke. The PCM uses this information in conjunction with the crankshaft position sensor to determine spark timing among other things.
The CMP sensor contains a Hall effect device which sends either a 0.0 volt or a 5.0 volt signal to the PCM depending on the position of the distributor shaft.
If the cam signal is lost while the engine is running, the PCM will calculate spark timing based on the last CMP signal and the engine will continue to run. However, the engine will not run after it is shut off.


Fig. 1: Exploded view of a common camshaft position sensor and related components-1996 5.2L engine shown

TESTING
  1. Make sure that the ignition is OFF , remove the distributor cap and turn the engine over by hand.
  2. Verify that the distributor shaft turns. If the distributor shaft does not turn, the engine must be checked for proper mechanical operation.
  3. Backprobe with a high impedance ohmmeter between the CMP sensor connector middle terminal and battery ground.
  4. Verify that the resistance is less than 5 ohms. If the resistance is not as specified, repair or replace the wiring as necessary and continue the test.
  5. With the ignition ON and the engine OFF , backprobe with a high impedance voltmeter between the sensor connector middle terminal and either of the end terminals.
  6. Verify that a 5 volt or greater signal is present at one of the two terminals. If not as specified, repair or replace the wiring as necessary and continue the test.
  7. With the ignition ON and the engine OFF , backprobe with a high impedance voltmeter between the sensor connector middle terminal and the end terminal that did not have the 5 volt or greater signal.
  8. Crank the engine by hand and verify that the voltage reading alternates between 0.0 or 5.0 volts.
  9. Install the distributor cap and crank the engine with starter. Verify that the voltage reading is 2.5 volts (averaging voltmeters only).
  10. If the voltage readings are not as specified, the sensor may be faulty.

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Aug 02, 2017 | Jeep Cars & Trucks

1 Answer

Code P0016 on toyota sienna 2006


code p 0016 refers to crankshaft (CKP) position/cam shaft (CMP)position --bank 1 sensor A---correlation===causes --wiring--CKP sensor ---CMP sensor --mechanical fault
what that means that when the piston is in a certain and reports to the ECM then the camshaft sensor has to report the position of the cam shaft so that the two are in the correct position in relation to each other ( camshfat timing)
could be problem wires , dirty connections or failing sensors
The mechanical fault could be that the camshaft advance /retard operation has failed and throwing the correlation out

May 23, 2017 | Toyota Cars & Trucks

1 Answer

What is the funtion of cam shaft position sencer


Camshaft position sensor gives the position of cam related to the engine crankshaft which is useful for the fuel supply; ignition, injection, valve opening and closing system. Magnetic type sensor is used on the timing cover over the camshaft gear. Camshaft position sensor is same as that of crank shaft speed sensor in terms of construction and working. (Source: http://www.theautopartsshop.com/carsystem/what-is-camshaft-position-sensor.html)

Apr 19, 2013 | Cars & Trucks

1 Answer

WHAT IS THE CODE P0341


This P0341 code basically means that the powertrain control module (PCM) detected a problem with the camshaft signal. The camshaft position sensor (CPS) sends a specific signal to the PCM for Top Dead Center on the compression stroke as well as signals indicating the position of the cam sensor. This is accomplished through a reluctor wheel attached to the camshaft that passes by the cam sensor. Any time that the signal to the PCM is inconsistent with what the signal should be, this code is set. NOTE: this code can also be set by extended cranking periods.
FB.init("dd7d9e9681341cde77587bc6a2029f6f"); OBD-Codes.com on Facebook Symptoms The car will likely run with this code set, as it is often intermittent and also because the PCM can often operate the vehicle in "limp-in/limp-home" mode even with a cam sensor signal problem. There may be no noticeable symptoms other than:
  • Poor fuel economy (if engine runs)
  • Possible no start condition
Causes A code P0341 may mean that one or more of the following has happened:
  • Cam sensor wiring routed too close to spark plug wiring (causing interference)
  • Poor wiring connection at cam sensor
  • Poor wiring connection at PCM
  • Bad cam sensor
  • Damaged reluctor wheel
Possible Solutions Often relacing the sensor fixes this code, but not necessarily. Therefore it's important to check the following:
  • Check that the wiring isn't routed too close to any secondary ignition components (coil, spark plug wires, etc.)
  • Visually inspect the wiring at the sensor for any burn marks, discoloration indicative of melting or chafing
  • Visually inspect the cam sensor for damage
  • Visually inspect the reluctor wheel through the cam sensor port (if possible) for any missing teeth or any damage
  • If reluctor isn't visible from outside the engine, visual test can only be done by removing cam shaft or intake manifold (depending on engine design)
  • If all checks out okay, then replace the sensor.
Related Camshaft Trouble Codes: P0340

Mar 07, 2012 | 1996 Saturn SL

1 Answer

04 buick ranier rough idle almost stalls


DTC P0016 - Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A)
The crankshaft position sensor (CKP) and Camshaft position sensor (CMP) work in harmony to control the spark/fuel delivery and timing. They both consist of a reluctor, or tone, ring which passes over a magnetic sensor, which generates a voltage, indicating position.

The crankshaft sensor is part of the primary ignition system and functions as the "trigger". It detects the position of the crankshaft relays that information on to the PCM or the ignition module (depending on the vehicle) to control spark timing. The Camshaft position sensor detects the position of the camshafts and relays the information to the PCM. The PCM uses the CMP signal to identify the beginning of the injector sequence. What ties these two shafts and their sensors together is the timing belt or chain. The cam and crank should be precisely timed together. If the PCM detects that the Crank and Cam signals are out of time by a specific number of degrees, this P0016 code will set.

Symptoms of a P0016 will or may include:
Malfunction Indicator Lamp (MIL) illumination
The engine may run but with reduced performance
The engine may crank but not start
The engine may exhibit a rattle near the harmonic balancer indicating the tone ring is damaged
The engine may start and run, but poorly

Causes may include:
Timing chain stretched, or timing belt skipped a tooth due to wear
Misalignment of timing belt/chain
Tone ring on crankshaft slipped/broken
Tone ring on camshaft slipped/broken
Bad crank sensor
Bad cam sensor
Damaged wiring to crank/cam sensor
Timing belt/chain tensioner damaged

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Thank you for using Fixya, and have a nice day.

Nov 15, 2011 | 2004 Buick Rainier

1 Answer

1998 saturn sc2 po341


P0341 - Camshaft Position Sensor Circuit Range/Performance

This P0341 code basically means that the powertrain control module (PCM) detected a problem with the camshaft signal. The camshaft position sensor (CPS) sends a specific signal to the PCM for Top Dead Center on the compression stroke as well as signals indicating the position of the cam sensor. This is accomplished through a reluctor wheel attached to the camshaft that passes by the cam sensor. Any time that the signal to the PCM is inconsistent with what the signal should be, this code is set. NOTE: this code can also be set by extended cranking periods.

Symptoms: The car will likely run with this code set, as it is often intermittent and also because the PCM can often operate the vehicle in "limp-in/limp-home" mode even with a cam sensor signal problem. There may be no noticeable symptoms other than:
* Poor fuel economy (if engine runs)
* Possible no start condition


Causes: A code P0341 may mean that one or more of the following has happened:
* Cam sensor wiring routed too close to spark plug wiring (causing interference)
* Poor wiring connection at cam sensor
* Poor wiring connection at PCM
* Bad cam sensor
* Damaged reluctor wheel

Possible Solutions: Often relacing the sensor fixes this code, but not necessarily. Therefore it's important to check the following:
* Check that the wiring isn't routed too close to any secondary ignition components (coil, spark plug wires, etc.)
* Visually inspect the wiring at the sensor for any burn marks, discoloration indicative of melting or chafing
* Visually inspect the cam sensor for damage
* Visually inspect the reluctor wheel through the cam sensor port (if possible) for any missing teeth or any damage
* If reluctor isn't visible from outside the engine, visual test can only be done by removing cam shaft or intake manifold (depending on engine design)
* If all checks out okay, then replace the sensor.

Related Camshaft Trouble Codes: P0340


Hope helps (remember to rate this answer).

Jan 03, 2011 | Saturn SC2 Cars & Trucks

1 Answer

PO 341 code on 2002 chevy impala


Hi,
This P0341 code basically means that the powertrain control module (PCM) detected a problem with the camshaft signal. The camshaft position sensor (CPS) sends a specific signal to the PCM for Top Dead Center on the compression stroke as well as signals indicating the position of the cam sensor. This is accomplished through a reluctor wheel attached to the camshaft that passes by the cam sensor. Any time that the signal to the PCM is inconsistent with what the signal should be, this code is set.
NOTE: this code can also be set by extended cranking periods.
Here is a possible solution to the problem;
  • Check that the wiring isn't routed too close to any secondary ignition components (coil, spark plug wires, etc.)
  • Visually inspect the wiring at the sensor for any burn marks, discoloration indicative of melting or chafing
  • Visually inspect the cam sensor for damage
  • Visually inspect the reluctor wheel through the cam sensor port (if possible) for any missing teeth or any damage
  • If reluctor isn't visible from outside the engine, visual test can only be done by removing cam shaft or intake manifold (depending on engine design)
  • If all checks out okay, then replace the sensor.


Be cool!!!!

Aug 02, 2010 | 2002 Chevrolet Impala

2 Answers

1999 chrysler 300m shaft cam sensor is bad.


did you check the ASD relay,located under the hood in the fuse and relay box. hope this can help.

May 14, 2010 | 1999 Chrysler 300M

1 Answer

Error code po340 for a 2002 hyundai elantra


Here is what I could find on your P0340 error code:
CausesA code P0340 could mean one or more of the following has happened:
  • a wire or connector in the circuit could be grounded/shorted/broken
  • the camshaft position sensor may have failed
  • the PCM may have failed
  • there exists an open circuit
  • the crankshaft position sensor may have failed
Possible SolutionsWith a P0340 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:
  • Visually inspect all the wiring and connectors in the circuit
  • Check for continuity in the circuit wiring
  • Check the operation (voltage) of the camshaft position sensor
  • Replace the camshaft position sensor as required
  • Check the crankshaft position circuit as well
  • Replace circuit wiring and/or connectors as required
  • Diagnose/replace the PCM as required
Sounds like since you have replaced both the camshaft and crank shaft sensors you need to look at the PCM.  Go down the line of possible solutions and don't replace the PCM unless nothing else works obviously.  I hope this helps but it looks like you are looking at getting a new PCM.  Good luck.  Thanks for rating my response and for using FixYa!

May 27, 2009 | Hyundai Motor 2002 Elantra

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