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Matt, Mechanical Engineer
Category: Toyota
Satisfied Customers: 22736
Experience:  BEng hons Mech engineering, in auto industry 22 years
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toyota avensis estate 2006. it starting struggling to start

Customer Question

toyota avensis estate 2006. it starting struggling to start then when it got going it ran great. then the lights on the rev counter etc starting going on and off, then the rev counter was jumping about. I have had a new battery fitted two weeks ago and it worked perfect for a week then it all started happening again. if you push start it its fine . now it wont start its like the battery is flat again.
Submitted: 4 years ago.
Category: Toyota
Expert:  Matt replied 4 years ago.


If the car's not cranking then first check it can turned over by hand so double checking for any mechanical issues

If OK then check that the main battery cables are on tight and the terminals are clean and bright. Do the same for the engine / gearbox earth strap.
Then follow the main positive lead back to the engine and down to the starter motor, and check the connection at this end as well.

There should also be a small wire to the motor which should have 12V when you're turning the ignition switch to crank. If the 12V isn't there, check back along this wire for damage to the insulation or corroded connections

This 12V feed comes directly from the ignition switch so this may be faulty and need replacing

Check the resistance of the main positive lead that runs down to the motor as anything more than a few ohms and it should be replaced

Don't forget to try a jump start from another car / battery as its possible the battery is poor, if you have a voltmeter a healthy battery should read 12.7+V

also try substituting the battery for another as I've known a very flat battery to drag down the system voltage too far even with jump cables

one other thing to consider is that the immobiliser is faulty and preventing the starter from being enabled - however if the dash / ignition lights are on then this usually means that its off

If this is all OK then its possible the car needs a new starter motor

Customer: replied 4 years ago.

Hi again



A friend has put a reader on it and it comes up PO607 we dont no what this is. some one said to buy a new ECU should i

Expert:  Matt replied 4 years ago.

this p-code is pointing to an internal fault in the PCM/ ECU. More than likely, when the battery died, it caused the programming of the PCM to become corrupt. Sometimes the PCM can be re-programmed. Sometimes the only solution is going to be the replacement of the PCM

I'd suggest sending the ECU off for repair at some point and can reccommend these firms

however if its not cranking turning over its possible that its the security inside the ECU thats preventing this and you can confirm this by doing the tests I mention above about checking for 12V at the starter solenoid