Q: 02 Mitsubishi Lancer, no signal to injectors from ecm. Will the crank or cam sensor cause this? How do I check if it that or ecm?

asked by on

02 Mitsubishi Lancer. Replaced fuel pump, battery, and ecm was replaced with a used one. It will crank but no start. I don't think the injectors are getting the pulse signal from the ecm. They have 12v on the power side. Will a bad crank or cam sensor cause this? If so how do I check them? How do I check to see if it's a bad ecm?
My car has an automatic transmission.

You’re right in that the crank sensor (CKP) is the primary trigger for the injection pulse. But the only way to reliably check the CKP output is with a scope. If you don’t have a scope, all you can check is the internal resistance and that doesn’t tell the whole story. However, you may have made your problem more complicated by installing a used ECU. ECU’s and other modules in late model cars (cars made in this century) are mostly programmed to recognize the other modules in the car and will not operate when they find they are in a strange car. This was done to prevent chop shops from being able to sell off the modules in stolen cars. The only way to find if this is the case is with the factory scan tool. Some cars allow you to re-program the ECU. Others, like Mercedes have a much more involved unlocking procedure. If you still have the original ECU, I would recommend re-installing it to complete the troubleshooting. You can get help with this car by contacting Your Mechanic. They can send a technician to your home or office to check out your Mitsu and let you know what it will take to get it started again.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. 02 Mitsubishi Lancer, no signal to injectors from ecm. Will the crank or cam sensor cause this? How do I check if it that or ecm?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Q: Car won't start

This problem sounds like the battery is not charged enough to start the car. You should try and get a jump start so you can test the charging system and battery. You may have a defective battery, loose or bad...

Q: Q: Truck stuck in park

Be sure that you are fully depressing the brake pedal when shifting out of park as there is a parking pawl in the transmission that will prevent movement off the shifter workout first setting the brake compressed. If this does...

Q: Q: A/C stopped working

Hello. From what you describe it would appear that some sort of electrical failure has occurred. The first things I would check are the AC system's relays and fuses, including those for the blower if they are separate. If those...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...