CRANKS BUT NOT START

1997 Mazda 626

Tiny

Andy akas

August, 10, 2012 AT 5:46 AM

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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10 Answers

Tiny

saturntech9

August, 10, 2012 AT 7:09 AM

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?

Tiny

KHLow2008

August, 10, 2012 AT 7:20 AM

The guy is not a qualified electrician. He should not have done that.

Tiny

Andy akas

August, 10, 2012 AT 7:38 AM

We have checked all the fuses, they are ok

Tiny

KHLow2008

August, 10, 2012 AT 7:57 AM

Is the engine running now?
Did you check the charging of the alternator? You need a voltmeter to do that.

Tiny

Andy akas

August, 10, 2012 AT 8:20 AM

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

KHLow2008

August, 10, 2012 AT 9:10 AM

Remove the PCM and check the circuitboard for signs of shorting and burnt smell.

Tiny

Andy akas

August, 10, 2012 AT 9:21 AM

I have done that, there is no smell of burnt and no shorting

Tiny

KHLow2008

August, 10, 2012 AT 9:33 AM

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?

Tiny

Andy akas

August, 10, 2012 AT 10:02 AM

V4, test lamp, engine check light don't on when ignition is on

Tiny

KHLow2008

August, 10, 2012 AT 10:35 AM

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.

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