Question about 1998 Mitsubishi Eclipse

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No power to crank position sensor?

I have power to camshaft and coil pack, replaced ecu (pcm). Turns over just no sprak obviously because there is no power to crank sensor

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  • Mitsubishi Master
  • 21,873 Answers

The crank sensor gets power from the MFI relay just like the injectors and cam sensor do.

Posted on Jan 24, 2013


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Posted on Jan 02, 2017

  • 333 Answers

SOURCE: 1999 mitsubishi eclipse 2.0L na. no start.

On this model engine, the power to the coil pack is delivered directly from the power transistors located inside the PCM.
If you are not getting the signal to fire going into the coil, verify you are getting a good waveform from the crank angle sensor, and that the wiring from it to the PCM is intact. If the crank sensor is delivering signal to the PCM, and the PCM is not generating pulse via the internal power transistors, the PCM has failed (the power transistors blow open, it is fairly common on this Chrysler PCM).

Posted on Oct 30, 2009

  • 356 Answers

SOURCE: swapped a 1999 420A engine

first the cam sensor shouldn't be upside down from the 95. they both should be with the plug facing down. they 95 CAS has a different plug than the 99 CAS.
the 95 has round pins and the 99 has flat pins.

also the 95-96 relays are opposite the 97-99

besides that it could be the ecu. i also have heard of the locating pin on the intake cam shearing off, allowing the gear to turn with the timing belt without the actual camshaft spinning.

Posted on Sep 27, 2010

  • 1 Answer

SOURCE: Need help! on my 03 Lancer ls, no power on one coil pack side

You switched the coil plug with the crankcase sensor. Very common, I just had it happen. Think the ecu is not sending to that coil pack now. Gonna replace the ecu and pray.

Posted on Apr 26, 2012

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Related Questions:

1 Answer

Service engine light flashs when accelerating to speed over 65mph.

Flashing check engine light means that the catalysator can be damaged. There is most probably something wrong with the O2 sensor(s). Did you check for any fault code set in the PCM?

Aug 12, 2014 | 2002 Jeep Grand Cherokee

1 Answer

I have no spark to or from coil

Hi Rick, I'm glad to help! Rick, the PCM which is the Engine Controller must see a signal from the crankshaft position sensor and the camshaft position sensor before it will energize the ASD which is the Auto-Shut-Down-Relay. Which when energized then activates the spark to the coil pack. NOTE: Let's say the PCM is seeing the signal and is energizing the ASD but nothing is happening. If thats the case? FIRST: Try switching the ASD relay with another one just like it and see if it starts. If it doesn't, check every fuse under the hood and inside the vehicle. If they are all good. Then make sure there is power coming from the ignition switch to the ASD relay. Turn the key to the start position and see if the test light lights up. If it does then Replace the "Crank Sensor" first and see if it starts. If it still doesn't start then Replace the "Cam Sensor" If it still doesn't start. Then your into either a wiring problem somewhere or the PCM is bad. CAUTION: You must check every other possibility before replacing the PCM, because its very expensive. Hope this helps and have an awesome day Rick.

Apr 07, 2014 | 2005 Dodge Neon

1 Answer

No Spark

Is the PCM controlling the coil's ? You have B+ voltage at the dark green with orange trace wire at the coil pack ? The other two wire's go to the PCM - the PCM has transistor's that supply a ground to those two wire's when signal from crank sensor is seen . Opens an closes to build up voltage an to release a spark . You can test this control with a test light . Video's on youtube.

Nov 25, 2017 | 2003 Chrysler PT Cruiser

1 Answer

No high tension power out on sprak plug

Check crankshaft and camshaft position sensors.

Use an scanner to read any ECU trouble codes.

Nov 05, 2012 | 1999 Honda Accord

1 Answer

2003 vibe will not start

Do you know what Camshaft Actuator System is ?
The standard compression pressure is 1,400 kPa (203 psi).
The camshaft position (CMP) actuator system enables the powertrain control module (PCM) to change camshaft timing while the engine is running. The CMP actuator assembly (5) varies camshaft position in response to directional changes in oil pressure. The CMP actuator solenoid valve controls the oil pressure that is applied to advance or retard the camshaft. Modifying camshaft timing under changing engine demand provides better balance between the following performance concerns:
• Engine power output
• Fuel economy
• Lower tailpipe emissions
The CMP actuator solenoid valve (3) is controlled by the PCM. The crankshaft position (CKP) sensor (4) and the CMP sensor (1) are used to monitor changes in camshaft position. The PCM uses information from the following sensors in order to calculate the desired camshaft position:
• The engine coolant temperature (ECT) sensor
• The mass air flow (MAF) sensor
• The throttle position (TP) sensor
• The vehicle speed sensor (VSS)

This mite be something to look at , Is cam timing advanced or retarded . The ) CMP Actuator Assembly !

Mar 22, 2017 | 2003 Pontiac Vibe

1 Answer

2003 jeep grand cherokee. I dove my jeep last nigh had no problem this morning turns over but won't start. Used my code reader and got p0340 cam shaft sensor, replaced that and still having same...

DTC P0340 - Camshaft Position Sensor Circuit Malfunction
This indicates that a problem was detected in the camshaft position sensor circuit. Since it says circuit, that means the problem could lie in any part of the circuit - the sensor itself, the wiring, or the PCM. Don't just replace the CPS (camshaft position sensor) and think that will definitely fix it.

Symptoms can include:
Hard starting or no start
Rough running / misfiring
Loss of engine power

A 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

With 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

Monitor CMP sensor signal on a labscope looking for electrical noise that shows up on the pattern along with the CMP sensor Analog Current (AC) voltage sign wave signal.

Check timing belt alignment specific to the auxiliary shaft gear. There is a diamond on the gear that should align with a diamond on the rear belt cover just above the gear.

If electrical noise is present on the sensor signal, disconnect one coil pack at a time and disconnect the voltage regulator connection on the alternator to identify if the added electrical noise on the CMP signal pattern cleans up indicating the source of the electrical noise.

If no added electrical noise is present on the pattern and the timing gears are properly aligned, check the Dark Blue/Orange (DB/O) wire to verify it is not open between the sensor and PCM pin 85.

Also check the Grey/Red (GY/R) wire to verify it is providing a ground

In checking timing belt alignment, the auxiliary shaft sprocket has a diamond that should align with a diamond on the timing cover at the 12:00 position of the sprocket when the camshaft and crankshaft gears are at the top dead center position. If the Camshaft Position (CMP) sensor signal shows electrical noise on the labscope, disconnect the voltage regulator connection, and the coil packs individually to see if the electrical noise on the signal cleans up pinpointing the area of failure. If electrical noise cleans up when disconnecting a coil pack, remember that any of that pack's plug wires or the pack itself may be causing the noise.

Hope helps (remember to rate and comment this answer)..

Sep 05, 2011 | 2002 Jeep Grand Cherokee

1 Answer

Engine won't start

Sounds like an AUTOMATIC SHUTDOWN (ASD) RELAY problem. Fairly common on the Caravan.
Heres a brief overview of the ASD.
The Powertrain Control Module (PCM) operates the Auto Shutdown (ASD) relay by switching the ground path on and off.
The ASD relay supplies battery voltage to the fuel injectors, electronic ignition coil and the heating elements in the oxygen sensors.
The PCM controls the relay by switching the ground path for the solenoid side of the relay on and off. The PCM turns the ground path off when the ignition switch is in the Off position unless the 02 Heater Monitor test is being run. Refer to On-Board Diagnostics. When the ignition switch is in the On or Crank position, the PCM monitors the crankshaft position sensor and camshaft position sensor signals to determine engine speed and ignition timing (coil dwell). If the PCM does not receive the crankshaft position sensor and camshaft position sensor signals when the ignition switch is in the Run position, it will de-energize the ASD relay.
The ASD relay is located in the Power Distribution Center (PDC). The PDC is located on the driver's side inner fender well Power Distribution Center . A label on the underside of the PDC cover identifies the relays and fuses in the PDC
Check for good ground.
Good luck...i hope this helps, please rate me a fixya.

Jun 25, 2009 | 1994 Dodge Caravan

4 Answers

2.4 engine

either the engine ignition fuse\relay is bad or coil pack is defective

Jul 20, 2008 | 1995 Mitsubishi Galant

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