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Dan
Dan, Technician
Category: Mazda
Satisfied Customers: 23739
Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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2000 mazda 626 automatic trans 2.0 4cyl Will not start have

Customer Question

2000 mazda 626 automatic trans 2.0 4cyl Will not start have no spark at plugs. I ve replaced coil pack. crank position sensor checked all fuses and relays. Can you help with this problem?
Submitted: 9 months ago.
Category: Mazda
Expert:  Dan replied 9 months ago.

Hello, my name is***** the check engine light come on for bulb check when first turning key on?

Customer: replied 9 months ago.
My code reader indicates no code stored. the check engine
light does come on when first turning the key
Expert:  Dan replied 9 months ago.

Have you tried a different key? Are you getting any type of security system warnings on dash? Thanks.

Customer: replied 9 months ago.
there are no security key light on the dash keys are the same as before this issue
Expert:  Dan replied 9 months ago.

Does the black/white wire going to coil have power while trying to start?

Customer: replied 9 months ago.
black/white wire to coil has battery voltage when cranking
Expert:  Dan replied 9 months ago.

Considering what has been replaced it sounds like the ECM has failed. Verify wiring between crank sensor and ECM are good, if so replace the ECM. Crank sensor should produce around 1.5 while cranking. Here is a wiring diagram to help with testing. Let me know if you have questions, thanks.

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https://www.dropbox.com/s/k6znrv8x4ao7oqj/ckpswd.pdf?dl=0