Question about 2001 Mazda MPV

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I understand that dtc p1512 is very common on these mpv mazda's. In reading I also see it is sometimes but not always accompanied by a fan curcuit related error message dtc. I figured I save some time knowing I have two mpv's booked for Tuesday, one with p1512 by it's self with the second van having p1512 accompanied by a rad fame curcuit dtc, ( can't remember exact #), p0???. Freeze frame stored for rad fan code but will recheck after resetting ecm until returnig for more diagnostics.

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  • lkcuriousche Sep 06, 2010

    thanks for that. I will have to wait until Tues. to check as mentioned. I figured there might been a common fix being the fact it seems to such a common problem or complaint.
    Thanks again
    Louie

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  • Mazda Master
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Hi.

P1512 is stored when the Intake Manifold Runner Control shutter (IMRC ) valve is stuck closed.

The IMRC valve is opened by an actuator located behind the radiator, on top of valve cover.
The IMRC actuator is controlled by the PCM (main computer), and it is wired to
The actuator is connected to a 5-volt Black/Blue wire used to send the position switch voltage signal, and a Brown/White ground wire. When the IMRC actuator is closing the valves in the intake manifold, the switch should open, and the Black/Blue wire at the IMRC actuator should read 5 volts. If that does not happen, and you get the CEL, then the problem is the valve.
Repair is done testing and replacing faulty part, or replacing both valve and actuator.

About radiator fan problem, I do not think that they are related, first get rid of the shutter valve code that can have several side effects.

Also, as this is a very common problem I suggest calling Mazda and finding out if there is any cover on this repair.

Posted on Sep 06, 2010

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  • Master
  • 2,926 Answers

Your codes are related to circuit monitoring a short in the circuit. Have you replaced the relay with a known good relay? if so, have you verified the fan will work when wired direct? if so, it is a bad connection either in the connector itself or a frayed wire.

Posted on Sep 06, 2010

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Mazda mpv 2000 check engine light on code p1512 how to fix?


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I hope this helped (remember to rate and comment this answer).

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