Mechanics

CRANKS BUT NOT START

1997 Mazda 626 • 2,230,000 miles

Alternator problem, after fixed and tested ok, the electrician about changing the battery when the engine is running asked me to raise the throtle while removing the terminal of the battery, immediately it resulted to a high voltage and the car refuse to start again. We have tried the plug but it did not produce shock. Could this kind of problem affect the pcm? If yes can the pcm be repair? Because when the pcm is fixed, the battery, oil and ABS indicator lights appears on the dashboard. Pls assist me
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Andy akas
August 10, 2012.



Whydid he want to remove the battery cable while it was running?Thats a good way to spike and ruin the pcm you cant remove the battery cable while the car is running on a computer controled car. Have you checked all the fuses?


Saturntech9
Aug 10, 2012.
The guy is not a qualified electrician. He should not have done that.


KHLow2008
Aug 10, 2012.
We have checked all the fuses, they are ok


Tiny
Andy akas
Aug 10, 2012.
Is the engine running now?
Did you check the charging of the alternator? You need a voltmeter to do that.


KHLow2008
Aug 10, 2012.
It is not running, no spark in d plug, when ignition is on, the vehicle with a key logo don't appear on the dashboard. It is only the ABS, battery and oil logo that appears


Tiny
Andy akas
Aug 10, 2012.
Remove the PCM and check the circuitboard for signs of shorting and burnt smell.


KHLow2008
Aug 10, 2012.
I have done that, there is no smell of burnt and no shorting


Tiny
Andy akas
Aug 10, 2012.
Let us start all over again with the basics.
Which engine do you have?
Do you have a voltmeter or test light?
Does the Check Engine Light comes on when ignition switch is turned on?


KHLow2008
Aug 10, 2012.
V4, test lamp, engine check light don't on when ignition is on


Tiny
Andy akas
Aug 10, 2012.
Attached are the PCM schematics.
At the PCM, turn ignition switch on and ground terminal # 2 (Blue) with a test light and note if the MIL comes on.

Turn O/D on/off and note if the indicator in dash works.

If answer is NO to both above, check Meter Fuse (15 A ) underdash.


KHLow2008
Aug 10, 2012.