No check engine light with igition on

Tiny
RAMESES
  • MEMBER
  • 2000 MITSUBISHI
  • 1.9L
  • 6 CYL
  • MANUAL
  • 200 MILES
Engine turns when starting, but fuel pump relay wont come on even safety relay wont come on.
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Tuesday, June 14th, 2016 AT 6:58 PM

15 Replies

Tiny
CARADIODOC
  • EXPERT
Have you checked the diagnostic fault codes? If that is the automatic shutdown (ASD) relay, it gets turned on by the engine computer when it sees engine rotation, (cranking or running), and it knows that by the signals from the crankshaft position sensor and camshaft position sensor. Sometimes a failed sensor wont set a code if you are just cranking the engine. Most of the time the computer has to see the missing signal for a longer time period when you're coasting to a stop with a stalled engine.

If you are testing voltages at the ignition coil, any injector, or at the fuel pump, you still should see 12 volts for one second after turning on the ignition switch. That indicates the ASD relay and circuitry are okay and the computer has control over the relay. Use a test light for that. Many digital voltmeters don't respond fast enough for you to see that one-second blip.
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Tuesday, June 14th, 2016 AT 7:07 PM
Tiny
RAMESES
  • MEMBER
CARADIODOC thank for your respond. This car original problem was shutting down at unknown time of use. One mechanic already took a look at it and made it worst, he changed ignition coil and the said two relays then he gave up. I have no handheld monitor to see the fault code. By manually pressing the two relays I was able to run the car engine. On my investigation those two relays are loosing negative supply. I am not sure if it now has a faulty ECM. Yesterday I found a hanging wire with some sort of hard plastic material I assumed that it was a chipped part of sensor, I found it and the sensor was located by the side of the engine near near the air intake manifold. I do not know what sensor it is.
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Tuesday, June 14th, 2016 AT 8:19 PM
Tiny
CARADIODOC
  • EXPERT
What model do you have? I cannot find anything in 2000 with a 1.9L engine.
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Tuesday, June 14th, 2016 AT 11:25 PM
Tiny
RAMESES
  • MEMBER
Its Mitsubishi Lancer MX year 2000 model. Been searching for troubleshooting manual, but could not find one. Thank you very much CARADIODOC for spending time to help me. If you can find the link to download the file please tell me and I greatly appreciate you in advance.
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Wednesday, June 15th, 2016 AT 2:37 AM
Tiny
CARADIODOC
  • EXPERT
Which engine do you have? I can't copy and paste wiring diagrams. Sometimes I can manage to copy a small section of one system, but it won't let me copy entire manuals.

I can't find "Lancer" anywhere for 2000. I use ProDemand for wiring diagrams and Rock Auto for parts pictures and reference. Neither one lists a Lancer for 2000. Is there another model that's similar? There IS a Lancer listed for 2002. Only shows it with a 2.0L engine.
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Wednesday, June 15th, 2016 AT 10:18 PM
Tiny
RAMESES
  • MEMBER
Hi CARADIODOC! This car is asian, actually its only 1.6l. I made a mistake about it. I will try to search from those two you gave me regarding wiring diagrams & parts. I am not sure but from your experience thus all sensors goes directly to ecm? If I wont find any circuit reference about it my only way is to trace the sensor wirings one by one. Thank you and good day.
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Thursday, June 16th, 2016 AT 6:07 PM
Tiny
CARADIODOC
  • EXPERT
I never approve of throwing parts at a problem in hopes one will fix it, but since I don't have access to information for your model, the two best suspects are the crankshaft position sensor and the camshaft position sensor. It's the signals from both of them that tells the Engine Computer the engine is rotating, (cranking or running), and it's time to turn on the automatic shutdown, (ASD) relay. On some other models that might be called the ignition relay, fuel injection relay, ECM relay, or something like that.

Both of those sensors commonly fail on any car brand by becoming heat-sensitive. Typically they cause stalling at first when the engine is warmed up, or a failure to restart shortly after stopping a hot engine, then they work again after they cool down for an hour. Eventually they fail completely.

You may need to get these from a salvage yard, or buy one new one to try, then try the other one. The typical symptoms are no spark, no injector pulses, and the fuel pump doesn't run during cranking. Be aware that on some engines these sensors have a thick paper spacer on the end to set the critical air gap. Some have a thin plastic rib molded onto the end. Some don't require any adjustments.
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Thursday, June 16th, 2016 AT 10:12 PM
Tiny
RAMESES
  • MEMBER
CARADIODOC thank you so much for your advice. I think I was getting near of the problem solution. I found that the crank position sensor was open circuit & put a relay coil instead of it. Turn the ignition on & the car started normally but trip after awhile due to maybe missing signal from the sensor. I will buy that sensor & replace it. Hopefully the problem was solve by your help & kindness. Any advice of what type of handheld to buy to make works easier? Or a software I could download from sites using bluetooth connection to the pc to communicate to any car or engine? Again thank you so much.
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Friday, June 17th, 2016 AT 2:46 AM
Tiny
CARADIODOC
  • EXPERT
I have a Chrysler DRB3 scanner for all of my personal vehicles. A lot of independent shops bought them because with an extra plug-in card, it will do emissions-related stuff on all car brands after 1995. All the good scanners are expensive. You have to use it a lot to save money on taking your car to a mechanic.
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Friday, June 17th, 2016 AT 3:02 AM
Tiny
RAMESES
  • MEMBER
Thank you CARADIODOC, gota save some money for that scanner. Problem solve on that lancer after cps replacement. Hopefully my friends mind is rested while driving that car. Well give it a test drive tomorrow morning but I knew it was solve be'coz of you. Thank you very much.
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Friday, June 17th, 2016 AT 7:13 AM
Tiny
KEN
  • ADMIN
Yes Caradiodoc is one of our best guys, Please let us know what you find so we can continue.
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Friday, June 17th, 2016 AT 9:06 AM
Tiny
CARADIODOC
  • EXPERT
Hahaha. I have a lot of people fooled! :)
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Friday, June 17th, 2016 AT 3:01 PM
Tiny
RAMESES
  • MEMBER
My first impression of CARADIODOC? Expert & knows what he's saying, no ball rolling about it KEN. He'd help me a lot & I thank him so much 'coz the drive test passed. Replacing crank position sensor solved the problem KEN.
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Saturday, June 18th, 2016 AT 4:46 AM
Tiny
KEN
  • ADMIN
Great to hear the problem is fixed, please use 2Carpros anytime!
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Saturday, June 18th, 2016 AT 9:03 AM
Tiny
RAMESES
  • MEMBER
Thank u very much KEN. I surely use 2Carpros each time I will need expert advice. I feel at home over here.
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Sunday, June 19th, 2016 AT 2:28 AM

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