2009 mitsubushi colt 1.3 strange intermittent fault
Discussion
I've included a diagram of the two relays whose operation is confusing me.When i put the engine relay into place the car (i've tried three relays!)won't even turn over,engine is dead!
What should happen is pin four on engine relay should give power to pin 1 on throttle relay with ignition on.If i remove engine relay and bridge pin 3 and 4 on the junction box(which relay 'should' do itself)pin one goes live on the throttle relay as it should!
I've checked all terminals on the junction box for power with ignition on and off with both relays removed and all is good,it's just when i put both relays back into place things go tits up??
And to make things more confusing with the engine relay removed and pin 3 and 4 bridged car starts like i mentioned,but like its running on 2 cylinders,then when it warms up revs drop and it starts hunting badly!!
It either does this,or,it runs sweet as a chuffing nut!!lol???I'm thinking somethings duff in the junction box,or there's an internal fault in the ecu?Am i far off?:-)
One fault code,p1977 Etv comm error
What should happen is pin four on engine relay should give power to pin 1 on throttle relay with ignition on.If i remove engine relay and bridge pin 3 and 4 on the junction box(which relay 'should' do itself)pin one goes live on the throttle relay as it should!
I've checked all terminals on the junction box for power with ignition on and off with both relays removed and all is good,it's just when i put both relays back into place things go tits up??
And to make things more confusing with the engine relay removed and pin 3 and 4 bridged car starts like i mentioned,but like its running on 2 cylinders,then when it warms up revs drop and it starts hunting badly!!
It either does this,or,it runs sweet as a chuffing nut!!lol???I'm thinking somethings duff in the junction box,or there's an internal fault in the ecu?Am i far off?:-)
One fault code,p1977 Etv comm error
I've fitted correct relays,he had another of these cars that was running,i took relays off that and nothing!It's just strange you fit relays and the car is dead,remove engine relay,bridge pin 3 and 4 on the junction box where the relay was and car starts,either runs perfect or like a bag of spanners.
When the cars starts it instantly sounds rough as hell,stays like this and the revs stay steadyish,then after a minute or two the revs start to hunt up and down constantly,or as i said it sometimes runs perfectly.
I'll check more into the wiring/connection etc,thanks for your replies!
I'll check more into the wiring/connection etc,thanks for your replies!
Sorry,never checked back on replys!Putting correct,new relay in,the car is dead,doesn't crank at all!Short the two pins on the relay box and the car either runs perfectly,or like a bag of spanners!
I never got to the bottom of it.
The two wires that go to the ecu in the above original diagram of mine,neither show voltage with ignition on!
I never got to the bottom of it.
The two wires that go to the ecu in the above original diagram of mine,neither show voltage with ignition on!
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