Question about 1991 Plymouth Grand Voyager

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What sends timing information to the engine control module to generate the spark? Crankshaft sensor? Camshaft sensor? How can I check them before buying an engine control module?

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  • Donald Patterson Oct 01, 2009

    Is there any way to check the crankshaft sensor?

  • Donald Patterson Oct 01, 2009

    Thanks!

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  • Master
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Crank Sensor sends crank signal to coil pack module and to plugs and and wires and to computer.
The camshaft sends crank timing to computer. Vehicle can run with bad cam sensor but usually not with bad crank sensor.
02 sensors set air/fuel lean/rich fuel mixture

Posted on Oct 01, 2009

  • Nate Stansfield
    Nate Stansfield Oct 01, 2009

    check with an ohmmeter. If half or below I would replace. Half to infinity is good.

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Getting p0016 code


Crankshaft Position - Camshaft Position Correlation
What does this mean? OBD Code P0016refers to
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 Possible sumptoms of OBD code P0016
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 Possible causes of OBD code P0016
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
Possible Solutions First, visually inspect the cam and crank sensors and their harnesses for damage. If you notice broken/frayed wires, repair and recheck. If you have access to a scope, check the cam and crank patterns. If a pattern is missing, suspect a bad sensor or a slipping tone ring. Remove the cam gear and the crankshaft harmonic balancer and inspect the tone rings for proper alignment and make sure they're not loose or damaged or that they haven't sheared the key that aligns them. If they are properly installed, replace the sensor. If the signal appears normal, then check the timing chain/belt for proper alignment. If it's misaligned, check for a damaged tensioner that may have allowed the chain/belt to slip a tooth or several teeth. Also check that the belt/chain isn't stretched. Repair and recheck.

Nov 05, 2015 | 2010 Jaguar XF

1 Answer

How many camshaft sensors on a 1999 olds aurora


The Ignition Control System consists of the following components:
?€¢
Two crankshaft position sensors (A and B).


?€¢
Crankshaft reluctor ring.


?€¢
Camshaft position sensor.


?€¢
Ignition control module.


?€¢
4 separate ignition coils.


?€¢
Eight spark plug wires and conduit.


?€¢
Eight spark plugs.


?€¢
Knock sensor.


?€¢
Powertrain Control Module (PCM). Camshaft Position (CMP) Sensor
Right hand rear of the engine, near the power steering pump

Oct 01, 2015 | Cars & Trucks

1 Answer

How do replace ignition control module in 1998 K-1500 5.0 liter vortec


This system does not use the ignition module used on the DI systems in the past. The VCM controller now controls the ignition control (IC) and bypass functions.
The crankshaft sensor, located in the front engine cover, is perpendicular to a target wheel attached to the crankshaft. The target wheel is equipped with slots situated 60 degrees apart. As the crankshaft rotates, the target wheel rotates past the crankshaft position sensor. The rising and falling edges created by the slots cause a signal to be sent back to the VCM. This signal occurs three times per crankshaft revolution and is referred to as the 3x signal for V6 applications. The signal occurs four times per crankshaft revolution and is referred to as the 4x signal for V8 applications.
The VCM then utilizes this 3x (V6) or 4x (V8) signal in order to provide the correct spark to the engine by way of the single coil driver module. The single coil driver module is basically an electronic switch that when commanded by the VCM, causes the primary coil voltage to breakdown, energizing the secondary coil and providing a spark via the coil wire to the distributor cap. The distributor consists of the following components:
The system consists of the following components:
?€¢
Vehicle control module (VCM)


?€¢
Distributor


?€¢
Ignition coil driver module


?€¢
Ignition coil


?€¢
Crankshaft position (CKP) sensor


Now which part do you want to replace ?

?€¢
Cap and rotor


?€¢
Camshaft position sensor


?€¢
Gear drive and shaft

The camshaft drives the distributor shaft which rotates providing a spark to the correct cylinder by way of the cap and rotor. The camshaft position (CMP) sensor functions much like the crankshaft sensor previously described but provides only a 1x signal to the VCM. That is, for every 2 rotations of the crankshaft, there is 1 rotation of the camshaft. Note that the camshaft position sensor will not affect driveability. The sole purpose of the camshaft position sensor is to provide the VCM with the necessary information for the misfire diagnostic trouble codes (DTCs).

Sep 06, 2015 | 1998 Chevrolet K1500

2 Answers

I've replaced everything to do with ignition spark on ky 1998 gmc pickup it has a 350 vortech engine why am I jot getting spark at the spark plugs ?


There is a spark control modal in the distributor most books do not tell you about it . if you have replaced everything else try that

Apr 19, 2015 | GMC Cars & Trucks

1 Answer

I have trouble code P0018.engine wont start


http://www.obd-codes.com/p0018



What does that mean?

This diagnostic trouble code (DTC) is generic and applies to all makes & models of vehicles. 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 DTC will set. Bank 2 is the side of the engine that doesn't contains cylinder #1, the "A" sensor is most likely the intake camshaft side.

Note it is not uncommon on certain models to see this DTC in conjuction with P0008, P0009, P0016, P0017, and P0019. If you have a GM vehicle and have those multiple DTCs, check for service bulletins that may apply to your engine.
Symptoms

Symptoms of a P0018 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

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
  • An improperly torqued crankshaft balancer
  • A mis-built or mis-timed engine
  • A loose or missing crankshaft balancer bolt
  • The CMP actuator solenoid stuck open
  • The CMP actuator stuck in a position other than 0 degrees

Feb 01, 2013 | Cars & Trucks

1 Answer

What does acam or crankshaft sensor do


  • The crankshaft position sensor identifies position of the crankshaft to the ignition control module (ICM), engine control module (ECM) or powertrain control module (PCM)
  • When not replaced, vehicle could experience no- or hard start, long crank time, misfire, lack of power, excessive hydrocarbons in oil, spark plug fouling, catalytic converter failure, poor fuel economy, CEL/MIL illumination or intermittent shutdown.
  • The camshaft position sensor identifies position of the camshaft to the ignition control module (ICM), engine control module (ECM) or powertrain control module (PCM)
  • When not replaced, vehicle could experience no- or hard start, long crank time, misfire, lack of power, excessive hydrocarbons in oil, spark plug fouling, catalytic converter failure, poor fuel economy, CEL/MIL illumination or intermittent shutdown
  • Jul 24, 2012 | Cars & Trucks

    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

    Hope this helps; also keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.

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

    Nov 15, 2011 | 2004 Buick Rainier

    1 Answer

    Hey i just helped my friend put a motor in is 99 gt, it turns over but no spark from the coils, ive tried eveything i can think of and still nothing


    what motor?

    Is the PCM power relay activating? If yes, you should hear the fuel pump hum for 5 seconds when the key is turned to ON.

    If yes, then check the crankshaft position sensor and camshaft position sensors to be sure they have output to the PCM.

    The crankshaft position sensor:
    • sends the powertrain control module a signal indicating crankshaft position.
    • is essential for calculating spark timing.
    Crankshaft Position Sensor (Integrated Ignition Systems) The crankshaft position (CKP) sensor is a magnetic transducer mounted on the engine block adjacent to a pulse wheel located on the crankshaft. By monitoring the crankshaft mounted pulse wheel, the CKP is the primary sensor for ignition information to the powertrain control module (PCM). The trigger wheel has a total of 35 teeth spaced 10 degrees apart with one empty space for a missing tooth. The 6.8L ten cylinder pulse wheel has 39 teeth spaced 9 degrees apart and one 9 degree empty space for a missing tooth. By monitoring the trigger wheel, the CKP indicates crankshaft position and speed information to the PCM. By monitoring the missing tooth, the CKP is also able to identify piston travel in order to synchronize the ignition system and provide a way of tracking the angular position of the crankshaft relative to fixed reference (Figure 23) .


    Camshaft Position Sensor The camshaft position (CMP) sensor detects the position of the camshaft. The CMP sensor identifies when piston No. 1 is on its compression stroke. A signal is then sent to the powertrain control module (PCM) and used for synchronizing the firing of sequential fuel injectors. The Coil On Plug (COP) Ignition applications also use the CMP signal to select the proper ignition coil to fire. The input circuit to the PCM is referred to as the CMP input or circuit.
    There are two types of CMP sensors: the three pin connector Hall-effect type sensor (Figure 20) and the two pin connector variable reluctance sensor (Figure 21).



    A4 CHECK VREF VOLTAGE TO THROTTLE POSITION (TP) SENSOR
    • Disconnect TP sensor.
    • Key on, engine off.
    • Measure voltage between VREF and SIG RTN circuit at the TP sensor harness connector. Refer to the schematic in Pinpoint Test DH .
    Is voltage between 4.0 and 6.0 volts? -------- A17 CHECK PCM DRIVER TO COILS
    • Connect incandescent test lamp between B+ and each coil driver circuit at the harness connector.
    • Crank engine.
    Does lamp blink consistently and brightly (one blink per engine revolution)?

    Jul 24, 2011 | 1999 Ford Mustang Cobra

    1 Answer

    Need to know what fires coil 1995 mercury sable both wires to coil have power when key is turned on car cranks no spark from coil new coil what gives the coil extra power to fire


    what engine? 3.0L 2 Valve? 4 Valve?
    3.4L SHO engine?

    The PCM (engine computer) fires the coils, but it is never the cause of a problem. I suspect it is the crankshaft position sensor on the front of the engine by the crank pulley. easy to change.

    Crankshaft Position Sensor The crankshaft position sensor (CKP sensor) (6C315) is a variable reluctance sensor triggered by a 36-minus-1 tooth trigger wheel located on the crankshaft pulley and damper. The signal generated from the crankshaft position sensor is called the crankshaft position (CKP) signal, which provides base timing and crankshaft speed (rpm) information to the ignition control module (ICM) (12K072). Base timing is set at 10±2 degrees before top dead center (BTDC) AND IS NOT ADJUSTABLE. The powertrain control module (PCM) (12A650) will use this information with the spark advance information to determine ignition coil (12029) turn on or turn off time.

    Sep 15, 2009 | 1995 Mercury Sable

    1 Answer

    2004 Chevy Silverado HD 2500


    On many engines with distributor less ignition systems and sequential fuel injection, a camshaft position sensor is used to keep the engine's control module informed about the relative position of the crankshaft. By monitoring cam position (which allows the control module to determine when the intake and exhaust valves are opening and closing), the control module can use the cam position sensor's input along with that from the crankshaft position sensor to determine which cylinder in the engine's firing sequence is approaching top dead center. This information is then used by the engine control module to synchronize the pulsing of sequential fuel injectors so they match the firing order of the engine. On some applications, input from the camshaft position sensor is also required for ignition timing.
    The camshaft position sensor may be magnetic or Hall effect, and mounted on the timing cover over the camshaft gear, on the end of the cylinder head in an overhead cam application, or in a special housing that replaces the distributor (in the case of some of the GM applications). Operation and diagnosis is essentially the same as that for a crankshaft position sensor.  

    Re  check the wire harness and the sensor installation to the camshaft sensor in Bank #1 which is where the #1 cylinder is. Good luck and hope this adds some light to you question, keep me posted and be glad to help.

    Jun 02, 2009 | 2003 Chevrolet Silverado 2500HD

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