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Matt
Matt, Mechanical Engineer
Category: Toyota
Satisfied Customers: 20576
Experience:  BEng, Repaired my own cars and others for 20 years, worked in Formula 1 for 10 years
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My Dad has a 2005 Sienna van. I just went to back it into

Customer Question

My Dad has a 2005 Sienna van. I just went to back it into the driveway to load it in the morning and was a little farther out than I wanted to be so I restarted it and backed it up a little more then it seemed too close so I went to start it to move it forward and the engine wouldn't start. Battery working but it's not cranking.
Submitted: 1 year ago.
Category: Toyota
Expert:  Matt replied 1 year ago.

Hello

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

Expert:  Matt replied 1 year ago.

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